NewCelica.org Forum banner

Stiffer Rear Anti Roll Bar mod Guide (free mod)

1 reading
15K views 42 replies 24 participants last post by  many  
#1 · (Edited)
Free MOD !!! Brought to you by SK Race Development ( thats how i call my own tuning ;) )

How to Make your rear anti roll bar ( sway bar ) stiffer on your celica VVTi VVTLi / GT GTS

1. Get both your rear wheels from the floor and remove the wheels
2. Remove the Links From The anti roll bar and rear suspension on both sides. (link see Pic1&3)
3. Then wrap the anti roll bar against the rear suspension with a tie-wrap (see pic2)
4. Then start drilling a hole under the original hole, begin small and go up to 10mm in small steps.
( the space between my holes is 11mm the hole its size is 10mm)
5. Remove the tie-wrap Re-attatch your links to he new drilled hole's and put everything back together
and you got a free stiffer rear anti roll bar (pic3)
(do the same on both sides ofcource all steps)

The Effect on handling : The car feels more stable and turns in better, also it makes the cornering speeds higher!
Less overall understeer and ofcource more fun to drive you can even kick the back out more easy if you want.
and if you really race and just go for the raceline it just turns in quite a bit better, makes my cd player skip in some of my test corners. That never happend before^^, its a free mod and its defenitly worth it !!!

Pic1
Image

Pic2
Image

Pic3
Image


Greetings
Sebastian
The netherlands
www.celicavvti.tk
direct mod guide link ---> http://www.geocities.com/celicavvti1999/skrd.html

i submitted this for install guide's - Suspension / Brakes
can't waith for a moderator too pass this :D im verry happy with this mod it really works and helps better then i tought even tough it just seems such little difference. just moving it down like one inch.

(update guide fix/Clarification )
 
#4 · (Edited)
that’s just temporary to hold the bar while drilling holes ! u cut it off later on ( i should add that to the guide maybey )
(the last pic shows it all connected again in the new hole the tie-wrap dissapeared ;) cut off )
 
#6 · (Edited)
the bar itself is verry tough, i found out while drilling the hole's in it gave me some extra trust in toyota steel. i am not that afraid it will snap / break.

can you Clarify yourselve further jlitman ?
or maybey a other forum member with some more knowlegde about vehicle dynamics can awnser on the probebility. i dont think its such a massive increase of stress on the component

in time you will know the durabilety of this mod hehe i gonne keep it this way !
but i dont worry about it, and even if it should snap no worry's it isnt a critical component u can drive without one and get it replaced

also not too much difference compered to origninal setup ---> http://img10.imageshack.us/img10/6793/origineelbarsml.jpg
 
#14 · (Edited)
yes they are massive and strong :bang:
i got the idea to do the back because i wanted to emliminated some more understeer.
someone posted a link here on the forum of somebody who did this too the front but the link was dead. but i know it could be done so i did the back :)

will this become a install guide in Suspension / Brakes ? ^^ i already posted it i geuss its waithing for approval :)

and for those who havn't seen my car in action yet, here it is on the nurburgring nordschleife http://www.youtube.com/watch?v=_hLQtSZZ7JM&fmt=18
 
#16 · (Edited)
No she said she could do it under 10 minutes in a van. But she never really managed. then she lost all extra weight in the van still didnt manage then she had a doge viper drive in front of her to kill the drag and she still just didnt manage to get under the 10 minutes. just by a few seconds. :gap: (her best with the van was 10min08sec)

i did it well under 10 minutes, 9min22sec i assure you thats pretty good for a 143 HP celica with some traffic(little) on the track, and a yellow flag situation in the end where i lose 6 seconds of my laptime(compared the loss to another lap i did on video). and its just the 12th lap ever i drove there
 
#17 ·
i may try this, is there enough room to do the front bar like this as well?
 
#18 · (Edited)
i think so, but i think you will just get more understeer. just doing the back feels great car feels more stable turns in better the limit is higher. easyer to make it oversteer. The handling just feels better.

update: i just checked it seems possible but the spacebetween the hole's needs to be bigger.
i couldn't see everything with my wheels still on in the front you still should check if there is enough space for the suspension to move when u change it i can't see all the construstion in the front. but i recommand to do the back only if you want a better handling car (and then i am talking about racing performance not that it just feels better)
 
#28 ·
But will you still get that nasty body roll at the front with a racing suspension set-up - sway bars?
.
I'd try that at your next autocross.

Stiffer springs and a lower CG have some anti-roll properties. I remember you said you have some traction issues last time out.
I have a stock sway/spring setup and sometimes disconnect the front bar (just remove one endlink) and it really helps put the power down on tight courses.
At the expense of some camber control.



Just don't roll the whole car.

dB
 
#24 ·
just don't plan on reusing them if they're old. they're not that costly to replace anyways. grind them off, torch them, whatever. moog sway links if available are the tits, greaseable, built tougher than stock, all metal sockets, and provisions for removing them easily later like a hex on the shaft outside the boot to grab onto. more often than not that hex key hole gets rusted and just doesnt hold up.
 
#26 ·
---SK---

That, sir, was an outstanding lap. I've been myself, lapped it slower in a 190 and i know the kind of commitment and skill that went into that lap. I salute you!

:bowdown:

PS next time i go back, i'll make sure i have working brakes... boiling the brake fluid 3-4mins into first lap was very scary and spoilt my times all weekend :(
 
#27 · (Edited)
thank you very much for you kind words. Not so much people respect such a lap in a 143 HP Celica. It was just my 12th lap ever but i must tell you ive practiced on a pc racesim's like rFactor / GT-Evolution.
Here u can watch me practice on the Nordschleife + the F1 track http://www.youtube.com/watch?v=MNZMcfQtFnY&fmt=18
 
#30 ·
Interesting. Sounds like a very good idea, but I'm already very concered about how tail happy my car will be with essentially zero weight over the rear wheels, so I'll hold off doing this mod until I've gotten used to the current set up and if I can handle any more turn-in...
 
#31 · (Edited)
Definitely autocross only.
Street/road course, no.

I think of it as a poor mans LSD.

Ideally I'd use a less effective front sway bar, not completely removed. I considered the redrilling idea, but I don't think there is enough metal toward the end of the blade on the front bar.

I think I cured my tail happiness by splitting the friction material front to back. I hadn't realized the light rear had been locking up early even in straight line braking. Anyone willing to install an adjustable proportioning valve will have more control over this VS. swapping brake pads.
dB
 
#39 ·
yes mine is still perfect and has done about 50 quick laps on the nurburgring nordschleife
This type of mod really isn't unusual, especially for autocross cars. In the 70's and 80's there weren't a lot of performance parts available for your average daily driver car. My Dad used to talk about the guys on tight budgets used to drill holes in sway bars and cut dead coils off of springs all the time.

The main advantage of an aftermarket sway bar over a mod like the ability to use a lighter/stronger material with a hollow bar design to save weight while still increasing stiffness. This will work just fine for anyone wanting a slightly stiffer rear without spending anything.

Honestly though the biggest adjustment for oversteer vs understeer is going to be adjusting the pressures of your tires front and rear. Running a higher pressure in the front and a lower pressure in the rear will giver you quite a bit of lift off oversteer on a stock suspension.
Awesome, I'm glad to hear that they are still strong! I haven't drilled much before, so is there a special kind of drill you need?
 
#37 ·
This type of mod really isn't unusual, especially for autocross cars. In the 70's and 80's there weren't a lot of performance parts available for your average daily driver car. My Dad used to talk about the guys on tight budgets used to drill holes in sway bars and cut dead coils off of springs all the time.

The main advantage of an aftermarket sway bar over a mod like the ability to use a lighter/stronger material with a hollow bar design to save weight while still increasing stiffness. This will work just fine for anyone wanting a slightly stiffer rear without spending anything.

Honestly though the biggest adjustment for oversteer vs understeer is going to be adjusting the pressures of your tires front and rear. Running a higher pressure in the front and a lower pressure in the rear will giver you quite a bit of lift off oversteer on a stock suspension.