300WHP forged steel or forged chromoly rods?

[cool2miketlu]

I am only looking at around 15psi for my car, is forged steel rods sufficient?? I know forged chromoly rods are better but when I am not seeing the power that makes it necessary I do not want it.
For people who knows about boosting is forged steel rods good enough for around 300~350WHP? Doing valves and valvesprings and retainers also a good thing to do???
So far I am sleeving the block, low compression pistons, rods, bearings for sure not sure if I need to do the valves + valvesprings + retainers... Its not too much money so I may do the valves as well but difference between forged steel and forged chromoly is around $500 and I rather not spend this if I do not have to.
Input please!!!!

[nyoneway]

Forge steel rods is fine for your power goal of 300whp. The new rods are denser, stronger per inch, as well as beefier (more metal) than the stock.

Having low compression pistons also places less stress on the rods - that's also factored in. Maybe your can spend that extra $500 on a better oil pump. New valves are nice if you can afford it and the valvesprings are not neccessary but might as well if you get new valves - the whole 9 yards while you're at it. So I guess it all depends on your budget. Basically all you need is Rods + Pistons + Oil Pump.

Oh yea, if you start messing with the valves and such, make sure you goto a experienced and reputable place. Have a dealer service manual ready and make sure they shim it and have it back to factory tolerances.

[tirechirp]

Which brands of rods are you talking about? I didn't know there were many choices available.

[cool2miketlu]

I do not know exactly but my mechanic is a Lexus tech, he is having shops he trust to do these jobs and use their recommandations. These shops are very experienced in engine buildup, since I do not know my engine as well as I like I am going to trust his judgement.
Looks like Steel may be the better choice, and now I should consider oil pump... I do remember there is a thread reguarding that somewhere... I guess I will be using search function :)

[Tikked Again]

As for bearings.

I have not heard of any company (other than toyota) that makes bearings for the 1zz.

[Darkside]

have fun going through trannies every year

[cool2miketlu]

well I was hoping I may be able to go through this tranny within a year, when it is time to replace I will see what I can replace it with. Worst come to worst I will swap to a GT-S tranny and tune down the turbo.

[marc]

Originally posted by Darkside
have fun going through trannies every year

yeah I was just gonna say, good luck with your transmission champ.

[Jersey Jay]

Mike, Chromoly would be the ticket so you would be on the safe side. We use forged steel pipe fittings in my industry and I've seen them crack from time to time sorry to say. I think you best bet would be to purchase a Skyline or a Saleen S-7 if you can live without the ABS.

[Darkside]

looks like i'll have a twin to race when i get back to socal next year :burnout:

[cmiguel32]

Originally posted by Darkside
looks like i'll have a twin to race when i get back to socal next year :burnout:

you'll have a triplet on the east coast if you ever make it out this way.

[Darkside]

cmiguel - mods?

cool2miketlu - what turbo are you changing to? what brand pistons/rods? returnline fuel system? valvejob isnt necessary by any means, but it would kinda be cool

DD hooked me up with my T3/T4 setup and i have Wiseco 8.8 pistons, Crower chromoly rods, and the same returnline fuel system that DD used for the boosted TRD GTS celi

i'm still trying to find an affordable bulletproof manual tranny but no luck so far.....my car is easily capable of 300-350 whp without harming my level10 tranny, but it is still an auto :(

[cool2miketlu]

I may either go with T3/T4 turbo (not exactly sure about the size for this yet) or go with the ball bearing T25 (direct replacement)
Only boosting 300~350 small turbo is fine for that, probably more preferable because it spool up faster :)
Custom oil cooler, GReddy oil catch can, bunch of other stuff I do not recall I already have right now...
Aria Pistons, overbored and sleeved, Eagle Rods I think... I do not recall the brand.

Already got the return fuel line with FPR and Supra TT fuel pump modified to fit intank.

[cmiguel32]

Right now im waiting on my turbo kit from stafford (shipped by christmas supposedly)
but as far as my motor goes i have:

wesico 8.8.1 pistons 1mm overbore
crower chromoly rods
motor's top deck is sealed with a custom aluminum block guard
block is o-ringed
EIP tuning custom copper head gasket
ARP stud kit (main/head/exhaust)
550cc injectors from mwr
250 LPH fuel pump from mwr
Apexi Power FC / commander
Apexi avcr
B&M oil cooler

I'm planning on building my spare head pretty soon

transmission:
TRD LSD
Fidanza flywheel
rps turbo clutch

granted i'll probably toast the tranny within a year too.
when that happens i'll have to get something custom.

[cool2miketlu]

cmiguel32: I read somewhere that the PowerFC has a boost controller function, all you need to do is add an addon to it. Might want to check that out, it may be better tunning wise to have it in 1 single unit.

[cmiguel32]

The reason i went with the avcr is for the gear dependent boost control function.. but i will def. call MWR to see what they say about a boost controller function with the power fc.

[Asha'man]

Hey people, good to see that there're more crazy people around and searching for power.

Take a look at the GT28 Ballbearing Turbo. Should spool up very fast like a small turbo and give you enoguh boost for your purposes.

[cmiguel32]

cool2miketlu: about a custom oil cooler..
the one i bought by b&m fits the gt, and is only around $120 bucks. I picked it up off summit. it's a universal import kit.

[c2gas]

Originally posted by Darkside
looks like i'll have a twin to race when i get back to socal next year :burnout:

quad man!!! I`m allready there.:burnout:

[Bing]

c2gas has been running his old setup at 1 bar(14.7PSI), he ordered the rods from Monkeywrench.(just like I did)
So, chromely rods would work.

Can't really tell about the forged steel ones, since I haven't read anything about it on the boards :O

[cool2miketlu]

I am going to go with the Chromoly rods, not sure about the valve train though... It will not be needed at this HP but it would be a nice thing to do, probably one of the few or first to do this on 1ZZ in 7th gen celica. I know once I am done with these mods I am done power wise on the car, maybe will start working on sound systems. I know I am weird everyone always work on sound first but I do not listen to music that much I leave that last :D

[c2gas]

Originally posted by cool2miketlu
I am going to go with the Chromoly rods, not sure about the valve train though... It will not be needed at this HP but it would be a nice thing to do, probably one of the few or first to do this on 1ZZ in 7th gen celica. I know once I am done with these mods I am done power wise on the car, maybe will start working on sound systems. I know I am weird everyone always work on sound first but I do not listen to music that much I leave that last :D

Dont bother with the valve train if you are not gonna increase the rpm dramatically. I think MW sells the crower rods for a great price, get those. Few ppl including me has it in theri car, and works great. I personally think they are far good till 400hp.

[cool2miketlu]

yeah but the supplier of the Aria pistons got the Eagle rods, get it all at same place. Do not want Weisco pistons because I have few friends who have burned through Weisco pistons (3SGTE friends). Granted they are on crazy boosts, but with higher boost they never had problem with JE Pistons...
I would prefer JE Pistons but wanna give Aria a try :)

[c2gas]

Originally posted by cool2miketlu
yeah but the supplier of the Aria pistons got the Eagle rods, get it all at same place. Do not want Weisco pistons because I have few friends who have burned through Weisco pistons (3SGTE friends). Granted they are on crazy boosts, but with higher boost they never had problem with JE Pistons...
I would prefer JE Pistons but wanna give Aria a try :)

Yeah I don`t have that kind of expirience, but as far as I know you can only burn thru a piston burning is not correct. I donno when but it happenes when burning in the cylinder has the same flame like when you do welding with flame, and that flame coses the hole.
I was checking JE a year ago, but they did not have any pistons for us. They would have taken orders for the costum maked piston. The price was higher then wiseco as I remember.

I`m not trying to convince you. I`m just happy with the wiseco.
Get the best you can.

[cool2miketlu]

it's cool, I know Weisco is more than sufficient for boost that Celica can handle, but kinda wanna try some other supplier just to see if the other manufacturer is made as well.

Hay C2gas is that dyno right?? You are twice my boost and you are only 33WHP more than mine.

[c2gas]

Originally posted by cool2miketlu
it's cool, I know Weisco is more than sufficient for boost that Celica can handle, but kinda wanna try some other supplier just to see if the other manufacturer is made as well.

Hay C2gas is that dyno right?? You are twice my boost and you are only 33WHP more than mine.

I think it is, but this dynoshop is a BS. They use some Italian dyno (VAMAG) it`s not a good one.
But I dont think I had much more hp by the time we dynoed the car. So the number is almost correct. There is only 1 issue I could have more power then, the vvti was not connected so the power courve dropped after 5000rpm, I may would have more if that was correct. But I think the max power just would be the ~same.

BTW I personally think a high max power itself is not a goal, I was satesfied with it, I was more pissed of the power drop.
It was cleared after 2 weeks when we found that problem, but never dynoed again, just felt much better power.