GT-Four Brake on ZZT231 [Archive]

Preludekid

10-25-2008, 06:27 AM

No adaptor needed, Dia300mm discs are for MBenz. We need to find a disc with correct offset to avoid hitting the lower ball joint. Machined to PCD100 5 holes for Celica. We also made a ring for the center hole for the disc.

The Caliper is fitted on the other side of the hub. i think you get the idea by looking at the pic. the caliper needed to machine 3mm off so the disc will be seating on the center of the caliper.

Cost for it is around US$770 (Calipers, Discs, modification of discs and caliper, labor)

Just installed last night.
Discs are still running in.

http://photos-e.ak.facebook.com/photos-ak-snc1/v351/41/17/677203774/n677203774_981372_3211.jpg

http://photos-c.ak.facebook.com/photos-ak-snc1/v351/41/17/677203774/n677203774_981370_2333.jpg
http://www.febi.com/cn/service/suche/produktkatalog.jsp?site=/default/febisearch/
Type in number 24076 for disc spec

http://photos-d.ak.facebook.com/photos-ak-snc1/v351/41/17/677203774/n677203774_981371_2765.jpg

DANZZT231

10-25-2008, 08:55 AM

very nice

Looking at the Hyper Rev Celica magazine, all of these hardcore Celi uses the GT4 ST205 calipers.

StreetKing

10-25-2008, 08:56 AM

Looking good! You should paint the calipers as well to match ur car's color since you've gone custom anyway. Props for our HK brother!

StreetKing

10-25-2008, 08:58 AM

Do you get the chance to test out how well they brake?? I am sure it's kinda hard since you don't really get a lot of open straight roads over there...

Preludekid

10-25-2008, 10:33 PM

I wouldn't try it at high speed until the discs are fully ran in.
A thin film of protective oil is still on the braking surfaces.
I have to wait until it evaporate.

Initial impression is great, graduate reponses. The more you step on the pedal, the more power it gives you.

I used high temp paint to paint it black, will paint the letters silver when i got the chance.

ULE

11-05-2008, 04:25 AM

the mercedes discs have 58.5mm height, so look at theese brembo discs

09.4965.10 for a ferrari 348/355

http://www.brembo.com/ITA/catalogo_AM/2007/index.html

same dimension, 61mm height.... maybe you don't need to machine the caliper ;)

and is a ferrari brake, very cool!!!!!!!!!!!!!

Preludekid

11-05-2008, 10:39 PM

Damn it... I didn't see that...
Thanks anyway...
So, when are you going to do this?

ULE

11-06-2008, 04:00 AM

I don't know, not so close, I hope before christmas...

zuoom

12-01-2008, 08:42 PM

preludekid,

what kind/model of pads are you running?

the rotor has to be the 300mm rotor?

Preludekid

12-01-2008, 09:20 PM

I am still running on Toyota pads. It comes with the old caliper, so....
After driving with it a while, I am definitely going for after market pads.
I mean this setup is perfect... it got the look, and it got the performance.
I am going for TRD or Endless. I used TRD before and I think it is good. My friend has a ST205 GT-Four, he said the best one to go with their car is Endless pad... So, I am still thinking.

For the other part, yes you have to use 300mm disc. This is radius that we got if you install this. Bigger disc will add weight to the rotational mass anyway....

zuoom

12-01-2008, 09:24 PM

ok, note to use 300mm disc.

got some info that the stock 205 rotors are 315mm.

regarding the pads. do you have to trim off any parts to get it to fix into this setup? ie: GT4 caliper on Merc Rotor in a Gen7 Celica.

Preludekid

12-01-2008, 09:58 PM

I see what you meant. but the mounting location is different.
Their mounting arm for the caliper extend out a little more then ours.
Therefore, we can only have 300mm rotor

i did nothing to the pads.
just machined the caliper, modified the rotor, trim off the dust shield. thats it.

hotshot2101

12-01-2008, 11:25 PM

did you just use the front disc brakes???

Preludekid

12-02-2008, 11:20 PM

yes, front only

hotshot2101

12-03-2008, 02:03 AM

yes, front only can you list what u used i might do this the brakes are bigger right???

to be advised

12-03-2008, 02:34 AM

Stock ST205 brakes are indeed 315mm.

Preludekid

12-03-2008, 06:57 AM

http://www.celicagtfour.com/205_brake_upgrade.htm
Go here to find out more.

My setup is a improved version of his setup.
As I said before, you can't use 315mm.

I found out that the hub of 185 alltrac is 95% identical to 7th gen.
The owner of alltrac use 297mm. 1 reason that I think he use the 205 rotor is because he doesn't have access to other rotors.

If you don't want to change to longer studs and add a spacer for the rotor, you must use the correct offset to avoid hitting the lower ball joint. Which he had also explained in his website.

Boosted2.0

12-03-2008, 11:15 AM

Rocketeer offroad and performance makes a nice brake upgrade kit for the ST185 with a custom rotor with removable hat - you should contact him and see how much it would be to get a hat & rotor made for you. His kits use wilwood calipers which are also nice though.

TSPORTPOWER

01-06-2009, 06:02 AM

what if we used a GT4 rotor a machined to 300 mm it would be a Direct fit right ? its the same offset etc right ?

TSPORTPOWER

01-06-2009, 07:39 AM

any one please ?

MADANGEL

01-06-2009, 05:59 PM

ok, very nice, but where can i find there caliper, anyone have a toyota part number or a easy way of finding these?

MADANGEL

01-06-2009, 06:05 PM

another thing, i assume so since no one is saying anything about this, but would the stock brake cylinder, the pump, support these fine?

Preludekid

01-06-2009, 08:34 PM

TSPORTPOWER

01-08-2009, 04:16 AM

First of all, original GT4 rotor will not work because it touches the lower ball joint.

I don't know the caliper part number but i think you can ask 6GC guys about it.

stock brake cylinder, the pump, support it no problem. I have went to some twisty roads and I am still alive.

thanks but if you machine the rotor of the GT4 to 300 mm will it be a direct fitment or the off set is not the same ?

or does discs from febi any good

becouse here they are asking 48.99 € thats 66.48 USD deliverd thats cheap

but using does rotors it will be the same off set and no need for studs or spacers right

do you no what car does rotors are from i mean the merc car year etc

Celicasaur

01-09-2009, 06:27 PM

No, ^^^ the gt-four discs wont fit if they are milled because they protude too far backwards onto the axel area.

Preludekid

01-10-2009, 02:46 AM

exactly

Preludekid

01-11-2009, 01:32 AM

http://photos-c.ak.fbcdn.net/photos-ak-snc1/v1931/41/17/677203774/n677203774_1282666_7725.jpg

If you use the 205 rotor, it will grind the lower ball joint. This is my setup.

Celicasaur

01-11-2009, 10:11 AM

Ahhh i see what you mean....I'm thinking though that a spacer on the hub would help cure the grinding...?

Depending on how large the spacer is needed, maybe the caliper bracket could then just be machined down and it'll line up nicely.

Preludekid

01-11-2009, 08:31 PM

of course you can get a spacer for the hub, and that will solve the grinding problem. However, you might need to change to longer studs.
Also, there is a possiblity of wheel shake if your spacer is not balance or properly install. So, my advice is stick with the solution with the less parts for the assembly.

to be advised

01-12-2009, 12:28 AM

Would there be any problem if it grind the lower balljoint?

TSPORTPOWER

01-12-2009, 05:52 AM

but if insted of taking 3 mm of the calipers we can put a 3 mm spacer in the hub its the same thing and the disc will be a litle bit away from the ball joint right

also will this fit the stock 16 wheel ? it should ft becouse the GT4 was a 315 mm discs and it uses 16 inch wheels

i also found out that trial uses this kit for the ZZT231 but they use a R32 GTR brake rotor its 296 mm 32

Celicasaur

01-12-2009, 08:48 AM

Would there be any problem if it grind the lower balljoint?

lol, yes!!!

but if insted of taking 3 mm of the calipers we can put a 3 mm spacer in the hub its the same thing and the disc will be a litle bit away from the ball joint right

also will this fit the stock 16 wheel ? it should ft becouse the GT4 was a 315 mm discs and it uses 16 inch wheels

i also found out that trial uses this kit for the ZZT231 but they use a R32 GTR brake rotor its 296 mm 32

Problem of the spacer on the hub would be that the caliper would then also need to move outwards by the same amount. That would be achieved by shaving down the bracket lightly...in theory it should work. As long as somebody can afford the downtime (like me at the moment!) then I'm fairly sure this shouldn't be the hardest thing in the world to do.

And yes, 315mm discs should be fine on 16" wheels, as my wheels on my car had come off from a st205 when I bought them.

TSPORTPOWER

01-13-2009, 05:43 AM

the center ring you talked about is for the hole facing the wheel not inside the disc right ? please give me the mesures
iam going for this setup the merc discs so i do need to take 3 mm of the calipers also ?

thanks

also i could no find the drawing of the Celica GTS

but could some one telme if this drawing is the same as the ones on the GTS

http://img237.imageshack.us/img237/3387/disctr1.th.jpg (http://img237.imageshack.us/my.php?image=disctr1.jpg)

is the disc hub of the GTS 132mm also ? becouse the merc was 153 mm

Preludekid

01-13-2009, 08:31 PM

The center ring that I refer to is not the mounting face (C), it is (F) with Dia55mm on the drawing.
The one for mer has a larger diameter. This hole helps you put the rotor on the same axis of the rotating hub.

Oh yes, please be aware of the wheel that you are using too. Cause not every wheel has enough space for the caliper.
If that happen, you might need wheel spacer.
My wheels has 3cm left for clearance after fitting everything together... barely made it.

My house is under minor renovation, it is a mess right now. Once it is done, I try to take off the wheel and take picture.

SMD 7

01-13-2009, 10:09 PM

looks nice

SuperDave

01-16-2009, 03:39 AM

lol, yes!!!
And yes, 315mm discs should be fine on 16" wheels, as my wheels on my car had come off from a st205 when I bought them.

315mm might be cutting it a bit fine in regards to ventilation. I know 300mm is what the R32 GTR ran with 16" rims. Can't really say for certain as I don't use larger rotors, but they do create a larger heat sink.

TSPORTPOWER

01-16-2009, 04:12 AM

315mm might be cutting it a bit fine in regards to ventilation. I know 300mm is what the R32 GTR ran with 16" rims. Can't really say for certain as I don't use larger rotors, but they do create a larger heat sink.

iam gona use the merc discs

they are 300 mm

but note that the Celica sT205 used a 315mm discs on 16 inch wheels and they are almost completly seald you cant see the calipers most of the times and no issues for it

to be advised

01-16-2009, 07:02 PM

[QUOTE=Celicasaur;4553486]lol, yes!!!

Can elaborate more on what the potential problems might faced in this grinding situation?

TSPORTPOWER

01-17-2009, 01:57 AM

[QUOTE=Celicasaur;4553486]lol, yes!!!

Can elaborate more on what the potential problems might faced in this grinding situation?

the ball joint is a moving part of the suspension , if hit the disc it will wreck the disc and destroy the ball joint , that was the suspension moving lower arm if gets really damaged it will , supose at high speed you can have acident etc , trust me its bad

culpable04

01-21-2009, 09:53 AM

Guys, I can't find the mercedez benz rotors, I looked on febi's website but it doesn't say what benz model and year they come from, I don't wanna have to import those rotors, I can get brembo or EBC rotors, but I need to know what year and model.

also, did the stock brake line fit with no mods ? is it long enough ?

to be advised

01-21-2009, 05:15 PM

Oh thats bad cos i think mine is grinding but the mechanice tells me its ok.
Think i better ask for another mechanic to advise.

Thanks for the information.

Celicasaur

01-21-2009, 05:48 PM

hmmm...how about if the lower ball joint was milled down on the outside edge slightly... :naughty:

SuperDave

01-22-2009, 02:51 AM

Reducing the strength of steering and suspension components doesn't sound like a flash idea to me.

TSPORTPOWER

01-22-2009, 07:48 AM

i have a prob i need 15 mm wheel spacers to the caliper to fit is there any draw back on using 15 mm spacer gona do it on the 4 wheels whit longer studs

TSPORTPOWER

01-29-2009, 04:00 PM

this is the pics from a guy in portugal that did this mod recently and helped my out on the center disc ring mater have mine finished too gona painted the calipers red, then gona take some pics to put here PS this is great mod and the car BREAKS like hell and i have not brake ward becouse the discs are still giving in
but he is using the same discs i am the brembos heres a few shots from he

Celicasaur

01-29-2009, 04:37 PM

stock zzt disks ^^^ ?

hombredelassrta

01-29-2009, 09:27 PM

wow well done. i like it

Preludekid

01-30-2009, 03:42 AM

congrat,

I was going to take my wheel off to take better pictures for you tonight.
Looks good mate

TSPORTPOWER

01-30-2009, 05:39 AM

this is not my setup but iam also gona use the 15mm spacers this is from another guy but iam gona use the same discs they for a merc from brembo like he is and gona use a 15mm spacer also on all 4 wheels like he is gona paint red , and he was black , celicasur the discs ARE 300 MM GTS stock are 274 mm , and this are alot more thick also

Celicasaur

01-30-2009, 08:19 PM

Care to share which merc disks they are? As in, which model merc the discs come from etc? I've got a pair of ST205 calipers also and need to make them fit because my set up really needs extra braking power :(

trdmsprts27

01-31-2009, 04:26 PM

Danm now imma have to do this conversion lol.

Quick question! Would this work as a rear set up as well?

Celicasaur

02-01-2009, 05:27 PM

I guess it could, in the same way that the front is made to work with the calipers...

I think I found the merc disks...seems like it may have come from a C43 AMG model, but I need to find the disc specs somewhere to confirm...either that, or somebody else to reveal the big secret.

Preludekid

02-01-2009, 10:26 PM

Just finished minor renovation at my home, now everything back to normal and I just took off the wheels to paint the rotor and polish the words on the caliper. the rotor is from Vito/Viano. I don't know if other merc models share this disc. Go to the first post of this topic, i have already given the part number of my febi disc, they have the spec on their web.

http://photos-f.ll.facebook.com/photos-ll-snc1/v2068/41/17/677203774/n677203774_1380597_93.jpg

http://photos-g.ll.facebook.com/photos-ll-snc1/v2068/41/17/677203774/n677203774_1380598_628.jpg

As for the rear, i didn't even think about doing it.
1) I think the Trial Celica only installed the ST205 caliper in the front.
2) I think the stopping power is more than enough now. i didn't feel brake fade after a few hot laps.
3) ST205 rear caliper and rotor can bolt straight on to ST185/ST202, no modifications

trdmsprts27

02-07-2009, 05:48 PM

what year these calipers off of. I cant seem to find em off ebay lol. Need right year to check the junk yards

Celicasaur

02-08-2009, 11:13 AM

1994-1998 generation 6 celica, ST205 model ^^^

trdmsprts27

02-08-2009, 11:49 AM

i knew the model and gen just not the exact year lol.

Celicasaur

02-08-2009, 12:04 PM

:o: my bad...

but yeah, any year between 1994 and 1998 :)

I'm going to try this, but possibly with the ferarri 355 brake discs as suggested earlier in the thread...i'll keep you all posted on developments.

trdmsprts27

02-08-2009, 07:53 PM

Anyone have a site i can get these from? lol found em on the UK ebay but they dont ship :bs:

Entranced

02-09-2009, 12:42 PM

wow, that looks sooo sexy :drool:

Celicasaur

02-10-2009, 09:08 AM

http://photos-g.ll.facebook.com/photos-ll-snc1/v2068/41/17/677203774/n677203774_1380598_628.jpg

This center hole you say that needs to be pressed in...why is that important? I'm curious :shrugs:

I'd assume that if the center hole is big enough to let the axel to poke through and allow the disc to seat firmly on the hub, there would be no need for this, no? I'm sure I'm missing the point of this somehow, but I'm not sure how... :(

trdmsprts27

02-10-2009, 11:59 AM

I didnt get that either. The rotor just sits there and the caliper keeps it firmly in place and once you bolt the rim on it the rotor will not move. :shrugs:

Preludekid

02-10-2009, 09:49 PM

of course, the rim will set the rotor firmly into position.
Without proper center hole, as soon as you leave your hand off the rotor, it will drop down and the rotor will be seating off from the center of the hub.

Again, if you don't set the rotor in the the same axis of the hub, the rotor
will spin in orbital form hence unbalance rotation.

The guy in Portugal that TSPORTPOWER posted before also has center ring made on his Brembo rotor. I don't know that guy, and he doesn't know me... that isn't a coincident. Ask your mechanic about it for more details.

I hope i explain clearly enough.

Celicasaur

02-11-2009, 02:23 AM

Ahhh.....yes, makes perfect sense - thanks for that buddy :)

trdmsprts27

02-11-2009, 03:47 AM

No it makes sense forgot theres a lil play on the studs lol.

Preludekid

02-12-2009, 06:27 AM

found a pic from japan.

http://f08batchimg.auctions.yahoo.co.jp/users/5/3/8/0/senarinnrinn-imgbatch_1234436781/600x450-2009021200033.jpg

http://f08batchimg.auctions.yahoo.co.jp/users/5/3/8/0/senarinnrinn-imgbatch_1234436781/600x450-2009021200031.jpg

davtrd

02-12-2009, 07:55 AM

http://photos-c.ak.fbcdn.net/photos-ak-snc1/v1931/41/17/677203774/n677203774_1282666_7725.jpg

If you use the 205 rotor, it will grind the lower ball joint. This is my setup.

would it work the same wit a super strut suspension set up
do u know

Soo__Fuego

02-12-2009, 07:18 PM

powerslot makes a bigger rotor for the celica, would the gt-4 caliper milled down fit those?

Preludekid

02-12-2009, 08:03 PM

would it work the same wit a super strut suspension set up
do u know

That I don't know... might be you can just use all stock parts from GT4.
Since both car uses super strunt.

Celicasaur

02-13-2009, 06:03 AM

powerslot makes a bigger rotor for the celica, would the gt-4 caliper milled down fit those?

the disk pad surface would still be as thin as oem zzt discs though...

davtrd

02-13-2009, 11:08 AM

That I don't know... might be you can just use all stock parts from GT4.
Since both car uses super strunt.

ye tink thats my nxt job
nice1

Soo__Fuego

02-13-2009, 06:53 PM

the disk pad surface would still be as thin as oem zzt discs though...

ahh ok, gotcha

Preludekid

02-17-2009, 10:17 PM

Since I didn't take any pics when I go through this process,
I hope someone will write a install guide after the have sucessfully installed.

TSPORTPOWER

05-28-2009, 04:23 PM

important note for this mod is , that using the stock brake lines is ok becouse the rubber bends ok no problem , i have this also and had the Project MU brake lines and they are like you no the stoptech brake lines but this is made for the stock calipers , meaning that they are short , prob is that when turning the wheels at max turning on manovers , the cables strech too much , one just broke 2 days ago , problem was solved by mesuring the cables stock mesures are 60 CM conector to conector , made 2 brand new SS brake lines like stop tech whith 67 cm no stress on the lines this way .

also to use this KIT on stock wheels HAVE to use at least 15mm spacers ( told by TRIAL japan to me ) and its a fact becouse i use the stock wheels and have to use that spacers

any help on the conversion please PM me

and many thanks to prelude KID

diomedes

06-03-2009, 05:57 PM

Can't wait till I do this conversion.

Anyone done the rears yet?

Toxygene

06-04-2009, 12:55 PM

Do you know if the brakes from the 90-93 ST185 Celica GT4 fit?

The reason I ask is because AP Racing just made a new Formula Brake kit for the ST185 and I'd love to see if it would fit on a ZZT Celica.

http://www.apracing.com/info/products.asp?product=%3Cimg+border%3D%222%22+src%3 D%22http%3A%2F%2Fwww.apracing.com%2Fpics%2Fproduct pics%2Ftoyota+logo.jpg%22%2F%3E-Celica+GT4+%2F+ST185++-+6+Piston+kits+CP5570-1018_1938_1713

Part numbers:

Black Caliper Kit Number - CP5570-1018.G8
Red Caliper Kit Number - CP5570-1018R2.C8

Incidentally, that AP Racing brake kit can be picked up through Stillen (http://www.stillen.com/page.asp?contactus).

http://www.turbocelica.nl/images/avisittoapracing/fitting.jpg

Preludekid

06-11-2009, 10:59 PM

Not really sure, but my setup should fit 185 as well. Hence, the AP kit should fit on ZZT231 and ST185. The entire front hub between 185 and 231 is very similar.

Thomas

08-07-2009, 07:47 AM

Let's bring this topic back to live....

I've found some GT4 calipers and I was wondering if anyone here has done this conversions lately.
The topic starter used modified Mbenz rotors and I want to know if I don't have to modify anything if I use the same rotors as Trial does (check link):

Link: http://www.trial.co.jp/trial-usa/celica/celi_calliper.htm

According a buddy of mine the Trial rotors are from TRD, but I don't have any info about these rotors.

Can somebody help me out, please?

Preludekid

08-07-2009, 08:50 AM

See the trial japan website.
I don't know any japanese but its written something about NISSAN GTR.
I think they use the disc from them.

http://www.trial.co.jp/osaka/original/turning/turning6.htm

Actually, how many people are interested in it?
Maybe I can custom make the hub just like the Trial version, and become a sponsor here.

Thomas

08-07-2009, 09:15 AM

It looks like you are right.

If you could make the hub just like that it would be awesome!

By the way, is your set-up still OK?

Preludekid

08-07-2009, 10:20 AM

Yes, without a single problem.
I am still alive after a few togue run against some fast cars like DC5R, DC2R, and Z33. Celica has more potential then people thought of.

If there are enough people interested in it, I can go see how much this would cost. My 6th gen friends also copied my setup. He is also a sponsor over at the 6th Gen Celica site. I can ask him if he is interested into doing this. He has good reputation over there. Hopefully 7th&6th gen guys group together can make the costs even lower.

My initial thought is have the disc center hub make to correct spec. Provide brake disc information so buyers can purchase it in the States. Do the hub/disc assembly on your own. The center hub isn't heavy so that will save some bucks there. I can also source the calipers too, but shipping won't be cheap..... so....

trdmsprts27

08-07-2009, 10:41 AM

i would love to do this convcersion but one lil project at a time for me lol

Preludekid

08-07-2009, 11:43 AM

I am going to get a rough quote of making it sometime next week.
My wife is out of town visiting Japan, gotta stay home all day long to look after my daugther.

euromotorsports

08-07-2009, 12:55 PM

I would be down for a kit actually... or at least just the hardware I can source the calipers myself if need be.

trdmsprts27

08-07-2009, 03:20 PM

the site ive been to has them for roughly $400 a set (front or rear) so if you can do beter that would be great.

Thomas

08-07-2009, 11:01 PM

I am going to get a rough quote of making it sometime next week.
My wife is out of town visiting Japan, gotta stay home all day long to look after my daugther.

That would be great. I'm going to pick up the calipers today. ;)

Thomas

08-07-2009, 11:46 PM

I was wondering why the GT4 brakes are grinding against the lower ball joint and the Mercedes rotors don't.
All rotors have flat surfaces right? So how is it possible?

Thomas

08-09-2009, 12:58 AM

There must be someone who can tell me why the GT4 rotor hist the lower ball joint and the MBenz rotors don't??

trdmsprts27

08-09-2009, 02:10 AM

there different in thickness

Thomas

08-09-2009, 03:20 AM

there different in thickness

The thickness is no issue here, I think.

When you look at this picture the problem would be the back of the rotor grinding against the lower ball joint.

http://photos-c.ak.fbcdn.net/photos-ak-snc1/v1931/41/17/677203774/n677203774_1282666_7725.jpg

Every rotor is flat at the back so why would the GT4 rotor hit the lower ball joint and the MBenz wouldn't?

Trm

08-09-2009, 08:47 AM

differences in rotor hat height most likely determine if it hits the ball joint or not

Thomas

08-09-2009, 09:52 AM

differences in rotor hat height most likely determine if it hits the ball joint or not

You're right...I checked it out this afternoon and depths are different.

But the GT4 rotor doesn't hit the lower ball joint. There is a clearance of 5mm.
I'll post some pictures this evening.

Thomas

08-09-2009, 03:23 PM

Checked out the GT4 calipers and rotors this afternoon and found out that the problem with the GT4 rotors isn't the lower ball joint.

This is a photo of the GT4 rotor on my celica. You see that there is still clearance:

http://i29.tinypic.com/2driagx.jpg

The bolts for mounting the capiler are also no problem for the GT4 rotors.

http://i28.tinypic.com/bhy7h2.jpg

But the problem is the diameter of 315mm and the rotor not being in the middle of the caliper.

@Preludekid: Can you tell me how much clearance the MBenz rotor gives to the bolts of the calipers? And could you take a picture of it?

blacktsport

08-09-2009, 03:59 PM

k0pking1o

08-09-2009, 09:56 PM

one noob question. Why is this better than the stock 7th Gen brake?

trdmsprts27

08-09-2009, 10:21 PM

^our stockies are a single piston. the ST205's are 2 piston calipers = better stopping power

Thomas

08-09-2009, 11:12 PM

Please someone sort out a cheap and easy way of getting these brakes mounted. A cheap and easy to find stock disc from another car that will bolt on and exact measurements of the amount of machining needed to grind down the caliper mounts would be awesome! :gap:

Working on that as we speak! ;)

I'll keep you guys updated!

btw: look at the difference between the stock GT rotor and the GT4 rotor!!

http://i32.tinypic.com/2m7udqg.jpg

Thomas

08-10-2009, 01:09 AM

Perhaps this rotor from the Subaru WRX will do the trick.
It has 5 holes with a center circle of 100mm, diameter is 293 and the height is 57mm. The only downside is the thickness of 24mm.

Perhaps this means that we don't have to take 3mm of the caliper and drill a hole pattern. ;)
We would also have clearance for the bolts/nuts to mount the calipers with and don't grind against the lower ball joint ;)
It would just leave us with machining a center ring for the hub.

Do you guys think this will work?

http://i29.tinypic.com/25uis8p.jpg

Thomas

08-11-2009, 01:02 PM

If everything goes as planned I'm able to test a Subaru Impreza WRX rotor tomorrow evening! I hope this will work. It saves a whole lot of effort.

trdmsprts27

08-11-2009, 01:18 PM

gl bro hope it works

euromotorsports

08-11-2009, 02:33 PM

yeah hope it all works out bro

Preludekid

08-11-2009, 10:14 PM

I have tried subaru disc before.
The subaru disc is 25mm thick, but the GT-Four caliper is designed for 28mm thick rotor.

Also, a correction........the GT-Four caliper is 4 pots, not 2.

http://i28.tinypic.com/bhy7h2.jpg
What car is this?
205rotor on 7th gen?
I think you started to see what happen if you use 205 rotor.

Thomas

08-11-2009, 11:04 PM

I have tried subaru disc before.
The subaru disc is 25mm thick, but the GT-Four caliper is designed for 28mm thick rotor..

Does any of you guys know what will happen if I use a 25mm thick disc instead of 28mm?

What car is this?
205rotor on 7th gen?
I think you started to see what happen if you use 205 rotor.

That is a picture of my 2ZZ. The rotor is from a 205.
Like I said on the previous page, the problem isn't the lower ball joint, but the diameter of 315mm and the rotor not being in line with the caliper.
If one would grind this rotor from 315mm to 300 and take off 3mm from the caliper then the 205 rotor could be used.

Thomas

08-13-2009, 01:58 AM

Went back to the garage tonight to see if Subaru Impreza WRX disks would work in combination with the GT4 calipers.

I borrowed Subaru Impreza 2.0 turbo disks from a friend of mine while these disks have the same dimensions as the WRX ones, except for the disk diameter.

So these are the smaller (rusty) Impreza 2.0 turbo disks mounted on my 2ZZ

http://i32.tinypic.com/qpp0t4.jpg

As you can see there is quite some space on the left of the brake pad.
I wonder if this is a problem or not.

http://i27.tinypic.com/33ktyq0.jpg

Also with the Subaru Impreza WRX disks there is enough space between the disk and the lower ball joint.

http://i25.tinypic.com/29ks37c.jpg

So the conclusion is that the WRX disks will fit, but are a bit small compared to the GT4 disks (24mm - 32mm). The question is if this is a problem or not.

The advantage is that you don't have to machine 3mm of the calipers. If you ever want to sell the calipers again, then you have a better chance when the calipers are not machined.

Preludekid

08-13-2009, 02:20 AM

it will cause problem for sure.
You definitely need to align the rotor to the center of caliper.

25vs28mm:
The problem is that after a while, you pads wear out. The pistons might not have enough travel to push against the disc... you can imagine what will happen then.

Thomas

08-13-2009, 02:26 AM

Thomas

08-13-2009, 02:40 AM

@Preludekid:

Why didn't you use GT4 disks and machined these to the right diameter of 300mm? Is it because you than had to take away more than 3mm of the caliper?

Preludekid

08-13-2009, 03:40 AM

Cause some edges of the pads will be outside of braking surface.

euromotorsports

08-13-2009, 05:08 AM

Does this only apply for the superstrut suspension? or is there clearance issues with the Mcpherson front suspension as well??

Thomas

08-13-2009, 05:51 AM

This is all about the Mcpherson front suspension.

Thomas

08-14-2009, 09:01 AM

Cause some edges of the pads will be outside of braking surface.

Do you mean the edges on the inside?

What kind of problem will you get after a while when some edges are outside of the braking surface?

Preludekid

08-15-2009, 11:39 AM

Exactly, the inside edge.
That means you are not utilizing the maximum surface area for braking.

The bell and rotor combo is expensive.
I am going to see if there is someone else making it professionally.

Thomas

08-27-2009, 10:46 AM

I've taken off 2.5mm of the GT4 calipers and found someone who has GT4 discs machined to 300mm in diameter and are 29mm thick.

I borrowed the discs from him to see if I can use his GT4 discs.
If all goes as planned I will have my "BBK" finished this weekend!:wiggle:

I've got just one question. Is it possible to use the right caliper on the left side and the left caliper on the right side? The calipers are marked with a "R" and a "L" but I don't know if it could cause damage if I switch the calipers.

Would be nice if you guys could help me out with this.

doublezero

08-29-2009, 05:12 AM

Why don't you just use the Skyline gtr r32 rotors like trial?
That way you can have thick 32mm rotors and the right diameter.

Just a question. What offset is required to fit these on and what size wheel minimum requirement.

euromotorsports

08-29-2009, 11:09 AM

skyline uses 5x114 correct? wouldn:t it need to be redrilled to fit 5x100

euromotorsports

08-29-2009, 11:40 AM

would you be able to use a 332mm rotor that is 32mm thick 5x100??? or no???

Thomas

08-29-2009, 02:29 PM

skyline uses 5x114 correct? wouldn:t it need to be redrilled to fit 5x100

Correct! That is why I don't want to use that rotor. I don't want to have to drill extra holes in my rotor.

This is what I've been up to last evening:

I need to take a tiny bit of the caliper and a bit of the rotor. Once that is done and I've ordered longer brakelines I can complete the conversion.:wiggle:

http://i32.tinypic.com/2gt5e7q.jpg

http://i28.tinypic.com/29y5iqv.jpg

http://i31.tinypic.com/vffbs6.jpg

http://i25.tinypic.com/ftennb.jpg

The brake pads fit the rotor perfect. There are no edges, the brake pads cover the whole rotor.
I just have a little space left between the rotor and the inner brake pad (about 4mm). I will solve this by taking 0.5mm off the caliper and 1mm off the rotor. This leaves a space of 2.5mm, but that is no problem.

euromotorsports

08-29-2009, 02:43 PM

how much for the rotors? know where we could get it as well?

Thomas

08-29-2009, 03:21 PM

how much for the rotors? know where we could get it as well?

The rotors are about $150,- ($75 per side). I just know where to get them here in the Netherlands.

doublezero

08-30-2009, 04:08 AM

The skyline r32 rotors are 296mm in diameter and I think you can get the non-drilled ones so you can drill in the 5x100 pattern.

Can anyone tell me if the calipers would fit under 15 or 16 inch wheels. Need to know asap. Thanks!

Preludekid

08-30-2009, 08:58 AM

Thomas:
Good for you, you are a step closer.
http://i25.tinypic.com/29ks37c.jpg
You said you are going to take 1mm off from the rotor inner bell, right?
Be careful, that the ball joint is far away enough from the disc.
So, 2.5mm still isn't exactly centered right?
I guess it would work too. Lets hope for the best.

DoubleZero,
This brake is from ST205, and they come in with 16" rims as standard.
My rims is Volksracing SE37, 17" +38mm offset. I have about 5mm clearance between the caliper and the rim. So, go <+38mm. You will have trouble with +42mm. +35mm should be even better.

Thomas

08-30-2009, 01:52 PM

Thomas:
Good for you, you are a step closer.
http://i25.tinypic.com/29ks37c.jpg

This is the picture with the disks from the impreza. I'm not going to use these disks.

You said you are going to take 1mm off from the rotor inner bell, right?
Be careful, that the ball joint is far away enough from the disc.
So, 2.5mm still isn't exactly centered right?
I guess it would work too. Lets hope for the best.

No, I'm not going to take 1mm off the inner bell, although that is a possibility.
I want to take 1mm of the outer face of the rotor so that I have a little more space between the outer brake pad and the rotor.
The ball joint is far enough from the disc. That is ok.

I know, 2.5mm isn't exactly centered, but I don't think it will cause a problem.

euromotorsports

09-01-2009, 02:22 PM

just checking so basically to get it to fit perfect I need a 300mm x 28mm rotor?? I know the Acura TSX uses that exact size but its 5x114, but you can always redrill to 5x100. should fit pretty nice

Trm

09-01-2009, 03:06 PM

Rotor hat height is also an important factor to consider. The wrong dimensions & it will be difficult to center on the caliper & may hit the ball joint. Wander around http://bremboaftermarket.com/En/Car_Disc_Catalogue/Catalogue_Search.aspx & you can get the dimensions for rotors you think may work.

euromotorsports

09-02-2009, 01:15 AM

Just checking if you had the entire front hub/caliper/rotor would it fit correctly??

Preludekid

09-05-2009, 05:39 AM

doublezero

09-08-2009, 07:57 AM

Just wanting to check with preludekid.

I can get rotors with no holes drilled on them yet. Do you think the R32 rotors which measure 296mm diameter, 53mm height, 32mm thickness be ok to use without machining anything off the calipers?

The only thing is to drill the 5 holes in.

Seven-Of-Nine

09-08-2009, 09:12 AM

Is the centre bore for the R32 discs the same as the Celica's Dia 54 I think.

Edit just wondering do the R32 Discs come in aftermarket two piece? can just get the middle alloy bits made up to suit the outer steel ring like the AEM / POWERSLOT types.

What specs are the Rotora disc or are those smaller i'm sure they did larger discs too.

Preludekid

09-08-2009, 10:46 PM

doublezero,

I am not sure about the hat height.

R32 32mm rotor
Unless, you send down your new pads by 2mm on each side.

doublezero

09-09-2009, 05:45 AM

doublezero,

I am not sure about the hat height.

R32 32mm rotor
Unless, you send down your new pads by 2mm on each side.

Man, I really want to know how trial make their one work with r32 rotors.

TSPORTPOWER

09-12-2009, 09:21 AM

Man, I really want to know how trial make their one work with r32 rotors.

very simple the R32 discs they use are aftermarket

and they change the central hub for a 5 /100 one becouse they are changeble

in there case you only need to change the surface that wears out not the central hub

TSPORTPOWER

09-13-2009, 04:52 AM

i still think like i told you that the Merc disc is Better solution and less expensive , you can use Brembo discs that are good and its just plug and play , making the center ring that can be used again for new discs when you need to change the old ones and the only draw back is the new holes you need to do

cheers

Thomas

12-13-2009, 12:27 AM

Finally finished my 205 brake conversion!

Let's take a walk through the process:

These are all the items I used:
http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120180.jpg

SS Brackets with thread tappered (I used these instead of nuts), SS bolts and a 2mm SS plate with the same dimensions as the brackets.
I made these brackets at my work.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120181.jpg

The brake pads: I machined 2mm of the outer brake pad for correct fitment.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120182.jpg

The used rotor is from a GT4 (ST205). The rotor is machined from 315mm to 300mm and from 32mm thick to 28mm thick.
2mm is machined from caliper mounting points.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120183.jpg

Brackets installed and torqued at 110Nm.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120189-1.jpg

It's about 2mm of centerline.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120191-1.jpg

All installed.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120184.jpg

Running brake fluid through the caliper.

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120186.jpg

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120188-1.jpg

Finally finished!

http://i48.tinypic.com/2gt3qkl.jpg

http://i743.photobucket.com/albums/xx78/Blokker/Celica/PC120193.jpg

In4Chad

12-13-2009, 03:44 AM

dayum nice write up!
oh why was the bracket made?
and i wish they could sell customize rotors to size and bolt pattern without costing an arm and a leg :(

should paint black with clear, or red with clear, or gold with clear

are you planning on doing the rear, i know the rear doesnt do much braking but it looks cool

Thomas

12-13-2009, 06:04 AM

Trm

12-13-2009, 09:20 AM

Thomas

12-13-2009, 11:12 AM

Nice conversion but too much machining every time you need to do your front brakes. Having to change two dimensions on the rotor & also the pads is extra hassle that could be avoided by searching for a rotor closer to the specs. Also would have went with grade 8 bolts or so to hold the calipers on. Looks good though.

Thanks.

Every time I need to do the front brakes? I drive about 5000 miles a year! :wiggle: I won't have to do the front brakes in a few years!
And if I need to buy new pads or rotors the machining can be done at my work ;)

A search was done for the best suitable rotor and machining needs to be done with everyone of them. These GT4 rotors don't require extra holes to be drilled or a spacer ring to fill out the center hole.

Why would you go for grade 8 bolts?

kimGT

12-13-2009, 12:05 PM

does it perform any better?

alpha Q

12-13-2009, 12:38 PM

Why would you go for grade 8 bolts?

Grade 8 bolts are the strongest

Trm

12-13-2009, 02:47 PM

The amount of stress placed on the bolts holding calipers on requires strengthened bolts. Check your stock ones, or ones that come on after market bbk, they are the heat treated etc grade 8. Just like motor mount bolts usually are ;) Easy & cheap enough upgrade. As for the machining, I wasn't referring to your car since you have access to a machine shop. Its for everyone else that would think of doing the swap like you did rather then as was done at the start of the thread. Not all rotors require that much work. A 5x100 bolt pattern into a rotor is alot less work then changing diameter & thickness. Still, congrats on getting it done & good job.

Thomas

12-13-2009, 03:00 PM

Grade 8 bolts are the strongest

Ahh I was confusing the Grade 8 with 8.8 of the metric Class. You're right. I have A4 80 SS bolts and the Grade 8 (Metric class 10.9) is the better choice.

Perhaps the best bolts are Grade 8, zinc plated. I'll check our warehouse tomorrow and see if we have 10.9 zinc plated bolts and nuts.

I could have gone for another rotor, but I didn't like the idea of adding extra holes to the rotor and don't forget a ring that needs to be machined to fill out the center hole ;)
The downside of the GT4 rotors they are hard to come by in the US.

Preludekid

12-14-2009, 08:34 PM

Thomas

12-15-2009, 12:17 AM

Great job and congrat~!
I was thinking about switching to your SS Brackets method for a long time ago. In fact, some of the 6GC guy using the Bracket method instead of nuts.
I didn't have the time for it yet.

The problem with the nuts is the space between the disc and the hub (body).
I can't fit a nut in between. there is a 10mm space in between and all the nuts are more than 10mm in height.
How did you do that?

I'm going to switch from SS to steel bolts and bracket because of the strenght. Bolts will be 10.9 metric class with fine thread.

Preludekid

12-15-2009, 05:56 AM

Thomas

12-19-2009, 02:09 PM

I got no problem using nuts, maybe because I used different disc.
I can slide the nuts into position and use the bolt to screw from behind like you.

Or what you can do is to seperate the caliper in half, install half part of the caliper with your bolts from another direction of what you are doing. Then put the disc, and assemble the caliper again.

It might cause alot of problem, but with what you said using the car for 5000mile a year. I don't think it is too much a problem. Changing brake pads isn't doesn't require to remove the caliper like the old one anyway. Changing the disc again will be a headache. Again, you are using the car not that much...

Hope this idea helps.

Thanks for the idea!
Because I wasn't satisfied with the SS brackets and nuts due to the unsufficient strenght of the SS bolts and the lack of enough thread in the SS brackets, I switched to galvanised steel bolts 10.9 metric class with fine thread and installed the calipers with the bolts from another direction.
I was afraid that I had to take apart the calipers if I wanted to install the bolts this way, but that wasn't necessary! I was able to slide in the bolts from behind the rotor and install the caliper :wiggle:

So there is no need to fabricate a bracket.
I'll post some pics tomorrow of how the calipers are now installed.

In the end this conversion doesn't require that much modifications at all.

Reniro

01-25-2010, 03:57 AM

any new Thomas ? :)

Reniro

01-27-2010, 03:01 AM

any chance to use the 315mm Rotor with 28mm thickness ?!
I could make a custom disc ... all sizes can be changed !
Are there any mods needed for mounting the caliper for the 315mm discs ?

trdmsprts27

02-04-2010, 01:44 AM

ok im about to start this project by spring, now i know the calipers need 3mm machined off in order to work but what exactly do i need as in rotors for it to work correctly? if i used spacers and extended studs what size spacer and size rotor, if i dont use spacers what size rotor? all these numbers for different rotors and not a real response kinda confused me. i know the brake lines need to be extended

Reniro

02-07-2010, 03:34 AM

i will start this project too,
maybe i have the chance to buy a blank disc of the mercedes Benz Version...
without holes and centerhole ...

Thomas

02-14-2010, 09:00 AM

any new Thomas ? :)

All is installed:wiggle:Just need to paint the calipers bronze.:wiggle:

Thomas

02-14-2010, 09:01 AM

i will start this project too,
maybe i have the chance to buy a blank disc of the mercedes Benz Version...
without holes and centerhole ...

I would just use the gt4 brake discs.

Reniro

02-17-2010, 03:24 AM

hmm, okay, but a lot of things have to been done !?
i found another Company in germany who make two-pieces
discs.... but i thing they will be very expensive :)

housefull

02-19-2010, 02:30 PM

rickpalace

03-31-2010, 08:00 PM

maybe this can help for custom discs???

http://bremboaftermarket.com/En/Car_Disc_Catalogue/Catalogue_Search.aspx?SearchMode=Size

Thomas

04-07-2010, 12:51 PM

maybe this can help for custom discs???

http://bremboaftermarket.com/En/Car_Disc_Catalogue/Catalogue_Search.aspx?SearchMode=Size

Not really. I've allready checked every rotor in that catalogue, but nothing matches exactly. The best choices are mentioned in this thread.

MADANGEL

05-03-2010, 10:32 AM

Toxygene

05-03-2010, 04:03 PM

hmm, okay, but a lot of things have to been done !?
i found another Company in germany who make two-pieces
discs.... but i thing they will be very expensive :)

Who are they? I might want to contact them.

Toxygene

05-03-2010, 04:05 PM

I went with sti rotors and calipers, I had to make some custom brakets, I have a nice mill at my job, and some grinding, been using for about 6+month wth no probs
http://www.newcelica.org/photopost/data/500/medium/IMG_00024.JPG

Maybe you could sell the bracket with instructions on how to fit the STI brakes.

How do the brakes feel by the way? Do they feel linear and firm or something different?

euromotorsports

05-04-2010, 10:27 AM

I'm wondering if the stock brake master cylinder can handle that brake setup since they were designed for STI BMC's... Anyword on brackets or anything?

MADANGEL

05-04-2010, 01:03 PM

The brakets were not exactly fun to make lol, i had to grind away at some of the bracket on the caliper and also some on the hub bracket, but the rotor drops right on, no issues, just have to get rid of the slash guard

but the car brakes very good, no shaking, or vibration, I am very happy with them, they saved me from a few accidents already, but I'm running 235/40/18, you might be able to find some 17s to fit but I had to look for rims that will fit a sti because of the offset and caliper clearance, but you can have wider tires and the wheels are about even with the fenders, looks realy nice :)

pitchblackgts

06-05-2010, 11:22 AM

anybody do the st205 rear conversion yet? I may be able to get a set of rear calipers and was hoping someone had some insight

xCraZyEddiEx

06-05-2010, 03:06 PM

jung from japan did the rear. look up his old posts.

Celaka

08-13-2010, 12:05 PM

wow nice work.... i also interested to put the st205 front and rear caliper into my zzt231 by seeing this perfect job i more confident my mechanic able to do that.. but i wonder doest our stock brake pump is able to push the st205 caliper brake piston?? doest it require to upgrade the brake pump to the bigger one????

carlito

08-24-2010, 04:30 AM

Hey guys look at that:

http://img376.imageshack.us/img376/9099/28102008197rz5.jpg

http://img111.imageshack.us/img111/7190/28102008198yy2.jpg

http://img231.imageshack.us/img231/2079/29102008199ec5.jpg

http://img291.imageshack.us/img291/412/29102008201ak4.jpg

http://img510.imageshack.us/img510/8455/29102008202fs8.jpg

http://img375.imageshack.us/img375/1615/29102008203qp5.jpg

http://img125.imageshack.us/img125/5422/29102008204ys1.jpg

It's how I resolved the problem (both calipers and disks are the stock from a ST205). ;)

Thomas

08-24-2010, 05:16 AM

Good job! Do you have a drawing of the bracket?

uplinkhack

08-24-2010, 05:21 AM

did you actually trim a small semi-circle portion off the calipers?

trdmsprts27

08-24-2010, 09:09 AM

dude i will buy a set of those brackets if it means no machining of the calipers

Thomas

08-24-2010, 01:20 PM

dude i will buy a set of those brackets if it means no machining of the calipers

Only drilling half a hole in the caliper from what I understand.

trdmsprts27

08-24-2010, 04:25 PM

yea thats better than machining them, if you use a different bolt the half moon could be a little smaller but regardless it doesn't effect the caliper

FreakyParts

09-13-2010, 09:59 AM

Hi Guys, I'm a noobie on here but a regular on CCUK
Just been looking over this thread and have a couple of questions.
Firstly, what's the PN of the Merc disks used in the OP's setup, I couldn't seem to find them. Otherwise, does anyone know what model they're off.
Secondly, some questions the guy who's made them fit with the 315mm GT4 disks...
Did you say you've machined them down to 300x28mm? I've looked at the specs on the GT4 disks and they're 315x32mm with a minimum thickness of 30mm. Have you machined them below their minimum thickness?
Also, the bolts/shim you've made up. What size bolts have you used to mount the caliper through to the threaded shim? as in thickness. Reason I ask is the rule of thumb with bolt thickness/depth is they need to go in as far as they are wide. So an M10 bolt (10mm thick) would need to screw in 10mm deep into the nut/shim mount you've made, otherwise you haven't got the strength.

I make several different BBK kits for the Celica (along with other cars) and I'm interested in offering a setup for the Gen 6-7 that uses the ST205 calipers where all the work has already been done, but without having to fit several different parts or have a lot of machining done. I also prefer re-drilling the disks and supplying spigot rings to centre the disk on the hub as that opens up a lot more options for the disks.

uplinkhack

09-15-2010, 05:01 AM

Front disc: You can use Lexus RX300 front discs. Offset is just right to not make contact with sway bar joints. However, need to drill holes to fit PCD 5x100. A custom bracket is all that is needed to fit the calipers in.

http://bremboaftermarket.com/En/Car_Disc_Catalogue/Catalogue_Detail.aspx?ModelIDMaster=65374

Discs are however only 28.1mm in thickness, but is working well in mine.

Thomas

09-15-2010, 06:14 AM

dude i will buy a set of those brackets if it means no machining of the calipers

Of what type of steel is this bracket made of? You better not use SS304 or SS316 because that material is not suited. You better also not be using SS bolts. The strenght is not up to spec. Bolts will need to be be Grade 8 or 10.9 metric class with fine thread.

Thomas

09-15-2010, 07:00 AM

Secondly, some questions the guy who's made them fit with the 315mm GT4 disks...
Did you say you've machined them down to 300x28mm? I've looked at the specs on the GT4 disks and they're 315x32mm with a minimum thickness of 30mm. Have you machined them below their minimum thickness?
Also, the bolts/shim you've made up. What size bolts have you used to mount the caliper through to the threaded shim? as in thickness. Reason I ask is the rule of thumb with bolt thickness/depth is they need to go in as far as they are wide. So an M10 bolt (10mm thick) would need to screw in 10mm deep into the nut/shim mount you've made, otherwise you haven't got the strength.
.

I've machined them down to 28mm. This is no problem while the weight of the GTS is so much less than the weight of a GT4. There is less heat involved while braking hard. So you can't refer to the GT4 specs. I'm not afraid that my disks will bend and I don't drive around that much that I need to swap my disks every one or two years for new ones due to thickness.

carlito

09-15-2010, 09:24 AM

Good job! Do you have a drawing of the bracket?
Thanks!
Actually I don't have the drawing but eventually I can get it from a friend of mine that has produced the brakets for me. ;-)

Only drilling half a hole in the caliper from what I understand.
It's correct.
Yes I had to do that, as you can see, because of one of the bolts retaining the bracket that was hitting the caliper.
Unfortunately when unsing the stock 315mm disks I experimented that I must put the caliper exactly in that position to don't hit the ball joints.
Considerate also that I also machined a bit the spindles near where the brackets are bolted to perfectly comply with the brackets.

Secondly, some questions the guy who's made them fit with the 315mm GT4 disks...
Did you say you've machined them down to 300x28mm? I've looked at the specs on the GT4 disks and they're 315x32mm with a minimum thickness of 30mm. Have you machined them below their minimum thickness?
I bought used disks with the calipers so they were quite worn and the thickness was about 30,5mm.
I'm still using them and usually on the track (Varano, Nordschleife, Rijeka) form 3 years and everything works fine but actually those disk thickness is around 28mm so I'm going to install a new set of TRD disks (32mm thickness).

Criz Valentine

09-20-2010, 09:32 AM

hello fellow celica owners from around the world.
i'm a new owner of a ss2 celica and new to this website.
i bought a hyper rev magazine on celica and was interested in st205 brakes conversion and i've been following this thread.

in my country it's easy to get parts from chop shops but i was wondering what size rotors is suitable. so far from this thread i only know it has to be 300mm in diameter but what about the thickness ?

thanks .

xCraZyEddiEx

09-24-2010, 09:18 AM

Thomas

09-24-2010, 11:39 AM

hi guys. i have a question. why have i not heard anyone mention "brake pad spacers" for this project? What are the pros and cons?

I'm using AEM (powerslot) rotors which are not that thick and i figured i would make up for the difference with spacers. If not that, why cant a person use thicker pistons?

Good questions. I've thought about spacers as well, but I'm afraid that the spacers might get stuck sideways and give brake problems. The only way to eliminate that is perhaps to put some really strong adhesive between the spacer and brake pad.

I don't know if there are bigger pistons.

xCraZyEddiEx

09-24-2010, 02:16 PM

thanks thomas.
That was the last piece of the puzzle i needed to figure out. I really wasnt in the mood to mill anything so hopefully this will work.

xCraZyEddiEx

09-25-2010, 08:50 AM

hey thomas, after doing some research i think a high temp grease or a tacky brake noise paste can be used between the back of the pad and the spacer/shim. reducing brake squeal also.

For those peeps looking to race or track with this setup titanium spacer/shim instead of ss or aluminum. titanium does not absorb heat as bad as ss or aluminum, greatly reducing the pistons or the calipers from overheating. the con is the pads will wear quicker from the heat but i would rather sacrifice the pads rather than the other brake parts. :D

Thomas

09-25-2010, 09:20 AM

xCraZyEddiEx

09-25-2010, 09:28 AM

i'll draw up the dimensions now. give me a minute

xCraZyEddiEx

09-25-2010, 10:44 AM

before i get flamed.
yes i know its not 300mm and everything else discussed previously. lol
i have 18 inch rims, im not trying to fit these on 16's.

eddie

http://img204.imageshack.us/img204/1462/aemrotors.png (http://img204.imageshack.us/i/aemrotors.png/)

xCraZyEddiEx

09-25-2010, 10:49 AM

ST205 rotors (Front) are 32mm- so 3.5mm BRAKE PAD spacers would be needed to compensate the 25mm aem rotors

ST205 rotors (rear) are 16mm- so 3.5mm BRAKE PAD spacers would be needed to compensate the 9mm aem rotors

Eddie

Thomas

09-25-2010, 11:56 AM

So you made a bracket to mount the calliper. Do you have pictures of your setup?

And where did you purchase the AEM rotors? Are they custom made for this setup?

xCraZyEddiEx

09-25-2010, 12:03 PM

no they are not custom made for this. i purchased them some a member here that sold me the whole set. the reason i chose to use these is because i wanted something as close as possible to oem as far as specs are concerned (bolt pattern, center, bla,bla, bla.

I have not made the brackets yet but i shall very soon.

Eric_TS

10-26-2010, 04:27 PM

Short question on this project.
Would it fit with the stock 16" Rims and 20mm spacers each side ?
I am not sure between this project, the rotora BB or the stoptech BB.
Regards

xCraZyEddiEx

11-18-2010, 12:50 PM

i think it would work with the suggestion of the mercedes rotors.

Keeper818

11-18-2010, 02:12 PM

I did this already guys! here are the pics!:

http://i721.photobucket.com/albums/ww220/Keeper81/DSC01012.jpg
http://i721.photobucket.com/albums/ww220/Keeper81/DSC01013.jpg
Pics of the bracket:
http://i721.photobucket.com/albums/ww220/Keeper81/DSC01007.jpg
http://i721.photobucket.com/albums/ww220/Keeper81/DSC00263.jpg
Spacers for brake pads:
http://i721.photobucket.com/albums/ww220/Keeper81/DSC00264.jpg

xCraZyEddiEx

11-18-2010, 02:31 PM

BRILLIANT!!!!! IM GLAD THE PAD SPACERS WORKED. :applaud::applaud: DID YOU MAKE YOUR OWN OR DID YOU PURCHASE IT? IM SUPER BUSY WITH THE BABY AND MY DADDY LIFESTYLE. GREAT JOB.

xCraZyEddiEx

11-18-2010, 03:13 PM

Pure Sex!!!

Keeper818

11-18-2010, 03:23 PM

yeah make al myself :) well made a template out of aluminium and then final bracket was custom laser cutted from 15mm thick ss

xCraZyEddiEx

11-18-2010, 03:34 PM

are you going to do the rear as well?

trdmsprts27

11-18-2010, 08:37 PM

yeah make al myself :) well made a template out of aluminium and then final bracket was custom laser cutted from 15mm thick ss

could you make another set of brackets to sell?

xCraZyEddiEx

11-19-2010, 10:56 AM

what grade ss you used for the bracket and the spacers? 440?

Keeper818

11-19-2010, 11:24 AM

are you going to do the rear as well?

Rear brakes was on my to do list but actually it is more difficult to make - also GT4 rear brake pad surface is hell a lot bigger than on Aem rear brake disc or oem disc. I've give up on rear project, for now :)

Keeper818

11-19-2010, 11:53 AM

could you make another set of brackets to sell?

Yeah i could made few more set of brackets sure, just there is few things also required for this to work as a little caliper modification, brake pad spacers and bolts/washers

johny123456

11-19-2010, 11:56 AM

Could you make a full set?

xCraZyEddiEx

11-19-2010, 12:29 PM

stay out of this johny. hehehe just kidding

trdmsprts27

11-19-2010, 04:03 PM

Yeah i could made few more set of brackets sure, just there is few things also required for this to work as a little caliper modification, brake pad spacers and bolts/washers
not a big deal there. how much do you think it would cost to get a necessary kit together?

purpleharo

11-19-2010, 04:55 PM

^ interested as well!

kortik

11-19-2010, 09:30 PM

me too hope it fits matrix I think it will

Preludekid

01-01-2011, 01:35 AM

Kortik, it should have a good chance to fit that on Matrix.
AE111 can fit 205 brake without the use of adaptor, just trim down the disc diameter and redrill hole pattern.
ZZT231 MacPhason strut is 99% identical to Corolla ZZE123.
I don't know too much about Matrix, because we don't have it here.
However, it looks like Matrix share the same platform with Corolla.

kortik

01-01-2011, 04:59 AM

yes Matrix and Corolla is the same thing inside the engine bay and underneath the car

Toxygene

01-04-2011, 12:06 AM

Has anyone seen or even thought about the Six Piston 330 x 32mm AP Racing brake kit for the ST185 Celica GT-Four for our Celica's?

http://www.apracing.com/info/products.asp?product=Celica+GT4+%2F+ST185++-+6+Piston+kits+CP5570-1018_1938_1713

http://www.turbocelica.nl/images/avisittoapracing/fitting.jpg

Too much brake?:shrugs:

Soo__Fuego

01-04-2011, 12:37 AM

Rotora makes a 6 piston bolt on kit ........ hombre has the 6 piston kit.

Toxygene

01-04-2011, 01:13 AM

I've only seen a 4 piston Rotora brake kit. I saw that K-Sport makes an 8 piston but this is an AP Racing brand caliper. I somehow think the quality would be a little better from the AP.

Soo__Fuego

01-04-2011, 01:32 AM

Rotora made 3 kits. The 6 piston, 4 piston with larger 2-piece rotor and a 4 piston with smaller 1-piece rotor.

Heres hombre's 6 piston kit

http://img.photobucket.com/albums/v640/hombredelassrtas/10%20june%20ultra%20ev%20show/P6270008.jpg

For sure AP > K-sport, but the price difference is pretty substantial.

Preludekid

01-04-2011, 09:06 AM

http://www.turbocelica.nl/

this guy uses ap 6 piston, he also has a cf prop shaft. crazy dude.

Thomas

01-04-2011, 11:30 AM

http://www.turbocelica.nl/

this guy uses ap 6 piston, he also has a cf prop shaft. crazy dude.

Yeah, that is Rene, a clubmember of mine. He's got some nice upgrades planned for this year! :cool:

Toxygene

01-04-2011, 12:07 PM

Yeah, that is Rene, a clubmember of mine. He's got some nice upgrades planned for this year! :cool:

Yeah good old Muerz

Thomas

01-04-2011, 02:07 PM

Yeah good old Muerz

Meurz ;)

Preludekid

01-04-2011, 08:04 PM

I follow his website since the very begining, and i emailed him a few times asking 185 mod questions. I was planning to get a 185 back then.

His site is good and done it in a very professional eye catching way.

MADANGEL

01-21-2011, 09:49 AM

Hombre's kit is custom, i think it was meant for a g35, thats also why he has 19s, i dont know if he can run 18s

REO

02-04-2011, 01:34 AM

http://i721.photobucket.com/albums/ww220/Keeper81/DSC01007.jpg

Do you think this bracket will also work with the stock 315mm brake discs?

Then it won`t be necessary to us brake pad spacers. :wiggle:

Is it possible to get the cad file from you? Then I will modifiy it for the stock discs.

Hope you can help me.

THX REO

Shizuma

02-14-2011, 12:32 PM

This is kinda off topic but do any of you st205 brake guys know the weight on the calipers?

xCraZyEddiEx

02-14-2011, 07:56 PM

these calipers are heavy. i will try to weigh them by the weekend. they are in my basement.

Thomas

02-14-2011, 10:07 PM

these calipers are heavy. i will try to weigh them by the weekend. they are in my basement.

No they're not.

The calipers are made from aluminium and don't weigh more than the stock calipers.

xCraZyEddiEx

02-14-2011, 10:12 PM

your right thomas. i take that comment back. i was speaking about the fact that i have them in a box and overall all four calipers are pretty heavy in the box. (note i also have a rear conversion kit also in there with rotors and all.):D

Shizuma

02-15-2011, 08:13 AM

^ Cool, let me know.

REO

02-15-2011, 04:15 PM

trdmsprts27

03-02-2011, 09:24 AM

does anyone know if the front spindles off the st205 would work on the 7th gen? if so it would eliminate the need for a bracket and you could use the rotors as well.

njccmd2002

03-04-2011, 04:05 AM

wow, have not logged here in a while.

but i believe for pad spacers, you guys can use an old brake pad with the surface grinded.

so there is no definite answer since everyone is running different setups.:AF:

Shizuma

03-04-2011, 08:03 AM

The weight of 1 ST205 caliper is:

3,90 kgs
8,60 lbs

Just got it today. :wiggle:

@Thomas

I want to give my calipers a new color. What is better for an Aluminium Caliper: Color Anodizing or Powdercoating? What do you think?

Anodizing doesn't work well with cast aluminum parts, it tends to come out weird (as in ugly). Not sure on powdercoating buuuuuuut I think you'd be better off with just a high-temperature ceramic.

REO

03-14-2011, 05:05 PM

My facelift brake calipers are powder coated. RAL1036 Pearlgold. Works pretty fine.

Cast aluminium is also metallicaly conductive so I think it won't be a problem to powder coat it. It's also temperatur resistant up to 300 degrees.

REO

03-27-2011, 07:18 AM

Have mounted my Calipers yesterday. I was amused to see that it fits but after I tryed to mount the rims I got some serious problems. The caliper colides with the rims. :o:

I have to use 10mm spacers to fit it perfect.

http://style-tuning.eu/Reo/Reo/GT401.jpg
http://style-tuning.eu/Reo/Reo/GT402.jpg
http://style-tuning.eu/Reo/Reo/GT403.jpg
http://style-tuning.eu/Reo/Reo/GT404.jpg

Maybe I will try an other alternative and make a bracket to fit it with the 315mm rotors.

The current setup is with the original rotors machined down to 300mm and 2,5mm machined off the caliper mounting points.

To machine the calipers was only 15min of work. It's not a big deal to make it.

xCraZyEddiEx

03-27-2011, 10:30 AM

looks good so far continue your success. im currently working on mine as well and my painting solution was using G2 caliper paint. It looks awesome. pics soon to follow.

xCraZyEddiEx

04-10-2011, 01:01 PM

here are pictures of the g2 caliper paint i purchased on amazon along with the caliper vinyl i got from a seller in the uk

http://img21.imageshack.us/img21/9011/dscn1604bd.jpg (http://img21.imageshack.us/i/dscn1604bd.jpg/)
http://img856.imageshack.us/img856/9360/dscn1606.jpg (http://img856.imageshack.us/i/dscn1606.jpg/)
http://img857.imageshack.us/img857/8621/dscn1607r.jpg (http://img857.imageshack.us/i/dscn1607r.jpg/)

Keeper818

04-10-2011, 01:05 PM

looks good, you'll be fitting the rear ones too?

xCraZyEddiEx

04-10-2011, 01:06 PM

indeed!:gap: im just a slow modder

Keeper818

04-10-2011, 01:15 PM

i've give up on rear ones :) thought too much work to make them fit

Thomas

04-10-2011, 11:30 PM

here are pictures of the g2 caliper paint i purchased on amazon along with the caliper vinyl i got from a seller in the uk

Could you post a link to the seller of the caliper vinyl?
Thanks!

xCraZyEddiEx

04-11-2011, 08:46 AM

HERE IT IS.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=350453018706

REO

04-11-2011, 04:02 PM

Which modifications do you have to do to fit the rear calipers?

MFChop

04-12-2011, 10:05 AM

Hey can someone post up a CAD file for the brackets. I wanna do this myself and maybe even mass produce them or maybe even a kit.....

trdmsprts27

04-12-2011, 10:35 AM

Hey can someone post up a CAD file for the brackets.

x2...............please

xCraZyEddiEx

04-12-2011, 07:47 PM

i guess when im finished with everything i will try to help with that request.

Shizuma

04-13-2011, 05:45 AM

^ Or just trace it and scan it. I'll make a damn CAD file lol.

Dammed

05-25-2011, 04:22 PM

I found a nice deal on Brembo discs and calipers for the GT4. The rotors are 340mm and the caliper is about 290mm long.

The K-sport big brake kit for our celica has 356mm rotors and it fits with 18".

Do you guys think the brembo kit will fit with 18" rims?

Criz Valentine

06-20-2011, 09:02 AM

just to inform and to flame .. it is possible to use original st205 disc without machining. it has been done.

trdmsprts27

06-21-2011, 08:01 AM

^then explain away with detailed pictures

purpleharo

06-21-2011, 10:30 AM

just to inform and to flame .. It is possible to use original st205 disc without machining. It has been done

please do sir

Criz Valentine

06-25-2011, 09:11 AM

I'm no mechanic but my mechanic and I have done it. It is possible if you can purchase the knuckle of ST205, machine the knuckle to fit 7th gen driveshaft and some parts to support the knuckle. I am currently using st205 knuckles, original 315mm rotor size and a 5mm spacer as my rims have a +42 offset

check out my blog for photos:
http://toyotaforme.blogspot.com/2011/06/project-update-part2.html

Preludekid

06-26-2011, 04:00 AM

criz, sounds like your car has super strunt suspension. thats why you can swap 205 machanism on to the 7th gen.

However, i don't think it works on cars with macphson strunt.

hombredelassrta

06-26-2011, 01:18 PM

very interested on specs to mount up the rear caliper?

Criz Valentine

06-27-2011, 06:56 PM

criz, sounds like your car has super strunt suspension. thats why you can swap 205 machanism on to the 7th gen.

However, i don't think it works on cars with macphson strunt.

yes i forgot to mention that. sadly i think so too.

very interested on specs to mount up the rear caliper?

i also bought the rear calipers with the rear rotors and rear knuckle. i'm still waiting for some finances to install them

hombredelassrta

06-27-2011, 08:33 PM

Another note, that is a hell of a paintjob using a caliper kit. Was it a spray? If not what brush did you use and did you sand down the caliper first? My stock rears turned out crappy using Duplicolor brake kit. May consider sanding it down first to get the caliper smooth then a better brush.

carlito

07-07-2011, 07:52 PM

http://i721.photobucket.com/albums/ww220/Keeper81/DSC00263.jpg

Nice job! My compliments. ;)

Well, after a small upgrde of the front disks and pads (new TRD disks an yellow EBC pads),

http://img195.imageshack.us/img195/2015/dscn0158vk.jpg (http://imageshack.us/photo/my-images/195/dscn0158vk.jpg/)

let's considerate now how to put the rear braking system of an ST205 into a T23 and how I did it.

To start let's see what are the differenses between the rear braking system of a T23 and the a rear braking system of a T20.

This is the part I decide to modify from a T20 (bracket for caliper support and parking brake assembly):

http://www.toyodiy.com/parts/diag_AFKoaL.png (http://www.toyodiy.com/parts/diag_AFKoaL.png/)

This is the same assembly in a T23 (bracket for caliper support and parking brake assembly):

http://www.toyodiy.com/parts/diag_2pLbe6.png (http://www.toyodiy.com/parts/diag_2pLbe6.png/)

And this is what actually is working in my T23:

http://img200.imageshack.us/img200/6092/immagineai.gif (http://imageshack.us/photo/my-images/200/immagineai.gif/)

So:

- as first the rond plate on the back of the parking brake assy was removed;
- then the housing for the rear hub was modified (because the hub of the T23 integrates the ABS sensor and has a larger and different conical profile) to fit the hub a the T23.
- so I provide to laser cut and weld onto the T20 assy a 11mm deep spacer (the 4 holed part) to to have a correct hole position for the T23 hub, and this is the part I am talking of:

http://img202.imageshack.us/img202/7775/flangia.png

- and in the end was only necessary to assemble all the rest of the parts of the parking brake of the T20.

And this is the result (without the disk):

http://img101.imageshack.us/img101/8785/dscn0153b.jpg (http://imageshack.us/photo/my-images/101/dscn0153b.jpg/)

and with the disk:

http://img405.imageshack.us/img405/2614/dscn0154g.jpg (http://imageshack.us/photo/my-images/405/dscn0154g.jpg/)

From the rear (the handbrake cable you can see is form a T23):

http://img842.imageshack.us/img842/8992/dscn0152tb.jpg (http://imageshack.us/photo/my-images/842/dscn0152tb.jpg/)

And it works! ;)

Criz Valentine

08-25-2011, 06:00 AM

so what size rotor did you use for the rear ? original st205 size ?

carlito

08-28-2011, 11:07 AM

so what size rotor did you use for the rear ? original st205 size ?
The rotor is exactly the stock one of the ST205 like the caliper support and all the handbrake devices.

Criz Valentine

08-29-2011, 02:23 AM

so there's no machining involved ? very good thanks ... i will be doing my rear next year ...

2zzgeFelipe

01-29-2012, 10:00 AM

Hello guys, i was looking for a celica GT-S and i finally got it and i want to do some things to the car, i got rear and front calipers from GT4, now i need to know what do i have to do in order to install them i saw all the post here but no ones give the schematic of the bracket ot the drawing the i need to get it to fit, please guys a little help, ill post pictures of my car and of the calipers on tuesday, Thanks

Felipe