I have a 07 grand prix 3.8 na. Im buying a used cartuning kit. Its the non intercooled version.
My questions are....
how much boost can i run on 91 octane gas?
Im also thinking of adding meth injection
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I have a 07 grand prix 3.8 na. Im buying a used cartuning kit. Its the non intercooled version.
My questions are....
how much boost can i run on 91 octane gas?
Im also thinking of adding meth injection
best answer is to scan for kr and when you see it, either reduce boost or pull timing. I ran water/methanol on my supercharged gtp and it works good. I went with the AEM kit. not a hard install, worked good, was progressive, just required filling the tank. maybe keep your eyes open for a cartuning intercooler kit, or build your own using ebay piping and air to air intercooler.
I'll 2nd the intercooler upgrade. For ~$300 you can reliably and permanently lower your air temps and gain performance.
I'd guess you'd be able to do 8-10psi non-I/C and up to 15-ish with I/C. Try to run the best octane you can (91-93, and non-ethanol premium when available... converting to E85 is possible out your way, but it's extra cost in a few ways).
Good luck with the purchase, and keep us updated on progress.
Not much on 91. 7 or 8.
And x2 on what everyone else said.
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