keep stock compression. Fight detonation w/ meth and tuning. and a good intercooler
thats my .02

 

How many miles do you have on the engine? If you have many miles don't forget you will need to resurface the cylinder walls if you change the piston rings.

If you are going to push moderate amounts of air through the cylinder you can probably stick with 10:1 pistons. If you are planning on running some massive boost I would consider going to 9.5:1 or 9:1.

running 15psi you can probably get away with 10:1 as long as you keep it cool.

 

sorry i was not to clear. my nephew has the 2.4 and is turboing it and wants to run 15psi on it.

 

Whats info for them all? I need to upgrade mine as well. Once I install ill be wanting to boost 12-15psi, and need to obvisouly upgrade to boost more then 8

 

well hahn has boosted more then 15 psi on stock internals..

http://www.turbosystem.com/ProjectVe...eStage3pdf.htm

yall should get acquainted with that before ya start talking

 

read the thread....i did all the work...you just have to follow through

 

Wiseco has made many sets of these pistons, and Carrillo has rods for the 2.4L.. i did the prototyping with them, even though other companies are selling the parts..

 

hmm good to know about the carrillo

 

Carillo making rods for the LE5 was posted on the very first page of this thread.
They look a lot like these.

 

haha i must've missed that.. their site sucks though.. none of the actual links work lol

 

Damn good point man! they use the EXACT same engine andthere making over 400 crank horsepower at 21psi without touching the internals... whats the deal guys ?? how come the skys can make that from the le5 but the cobys cant ??

 

none of the le cobalts have tried.

 

Just because you CAN doesn't mean it is SAFE.

 

does hahn mention how reliable making over 400hp is? just because it lasts for a pull or 2 doesnt mean jack. getting a stage 2 should be more than enought for most ppl anyways

 

Explain that to Bill Hahn Jr.

 

i would venture to say 300whp is safe and reliable. anything much over that and you're not forged internals then you're playing the lottery.

 

welll from what i remember when i was talking to hahn back in the day.. they had the car up to 408 whp for about 6 months and it was reliable .. they detuned it for further reliability

 

damn thats corvette territory .... so between 300whp-350whp should be safe as sunshine

 

depends on your driving habits..

 

very true

this also has nothing do to do with the tranny.. i can't guarantee the balt tranny can handle anything near that lol .. the F23 tranny has taken up to 500 whp with some clutch changes ..

however there are people that have grenaded the F23 on 200 crank hp lol

 

Makes me want to look into an SS/SC tranny swap. MVP hooked an SS/SC tranny up to an LE5 block, but he already had the SS/SC Cobalt. I wonder how his clutch search went and what he got out of it.

 

ikt was a bitch and a half for that whole build.. look on redline forums there are many cavis that have pushed nice HP out of the stock tranny though .. .

 

haha i was speaking mainly in terms of the engine itself. if your redlining every shift and bouncing off the limiter the engine just wont last. however if you have a car at that power level and dont dog on it it could essentially last forever(not in literal terms)

 

hehe yea.. i know what you meant.. i just dont want some people to think the car can handle 400 whp in stock for or even 300+ in stock form.. lol