If I were to rebuild my 3.8s bottom end w/ forged rods and pistons, how much boost do you think i could safely run through the motor. I'd like to be able to run 15-18 psi. Do you think this would be possible??
im not 100% sure but i think you should be fine, but dont forget to replace bearings, main studs, etc basically you would want to replace anything you can while you have the motor out, maybe someone else can chime in and list anything i may have forgot to mention. Also if you plan on running that much psi you may want to consider dont a tranny upgrade as well
pretty much everything thats offered in the intense kit, or the ZZP tranny, if you decide to go with the ZZP tranny you might want to add an LSD, single chain,input outshaft, you might want to contact zoomer or Big Jeff at intense they should be able to tell everything you need and what you can go without
if you notice, he has a camaro and has a 5-speed. Im not sure really on the tranny you have. You may want to refer to the RWD tranny forum to find out more
I run 15-17 (not exactly sure as the MAP sensor is pegged and havent been to the dyno lately). 15 psi is max you will see on a scan tool due to the limitations of the MAP sensor. Being the turbo forum I'm assuming your talking about turbo boost. Both bumpin and I are SC but I think the psi should be similar.
He was probably refering to boost with a turbo on the 9.4:1 compression L36. With a stock cam, stock heads, manifolds, and a stock PCM that would be about the limit. These guys running 15-17psi unintercooled boost have stage 3 cams, headwork, and headers.
With a PCM with timing control you could probably run 9-10psi from a turbo and be safe.
He was probably refering to boost with a turbo on the 9.4:1 compression L36. With a stock cam, stock heads, manifolds, and a stock PCM that would be about the limit. These guys running 15-17psi unintercooled boost have stage 3 cams, headwork, and headers.
With a PCM with timing control you could probably run 9-10psi from a turbo and be safe.
im gonna get my pcm reworked so im aiming for 10 psi non-ic. For the PCM, what all would you need to be reworked for it to run right? i know less timing, but what else?
I will be racing twice in the next two weeks at what I feel is the best track in the country, and I think we have finally figured out my tuning problems, so stay tuned for some new times very shortly, as well as dyno numbers. I wont be putting on an intercooler until next season, I have switched setups too many times already this year. I want to get the most out of this one before I change it again.
I was runing 17 psi of boost non intercooled on 92 octane with 24* of timing all day long with 0 KR until I tried to add on a smaller pulley and ran into some slippage issues, I think the reality of this is what heads are you using, what type of exhaust configuration you have, what is your compression, what cam do you have and also what power adder do you run. I really don't think its outlandish to say that with some race gas I should be able to push 22+lbs of boost non intercooled, once I have my belt slippage figured out I will let you know how far I can take it.
I am looking at either buying the stage 2 heads from zzp or from supersix motorsports. I have the GT2 cam from zzp, but ill probably wind up buying a turbo cam and set of aftermarket heads from intense. I currently have pacesetter headers and will be using a turbo kit that bolts right up to them. The exhaust will run open from the down pipe.
I am looking at either buying the stage 2 heads from zzp or from supersix motorsports. I have the GT2 cam from zzp, but ill probably wind up buying a turbo cam and set of aftermarket heads from intense. I currently have pacesetter headers and will be using a turbo kit that bolts right up to them. The exhaust will run open from the down pipe.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
3800Pro Forums
263.9K posts
26.7K members
Since 2004
A forum community dedicated to all General Motors makes and models owners and enthusiasts running the 3800 series engine. Come join the discussion about performance, modifications, classifieds, troubleshooting, builds, tunes, superchargers, maintenance, and more!