Turbo help

[sdenton8]

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

 

[SgtMarshal]

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.

 

[dezldave961]

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.

 

[GTPpower]

Not much on 91. 7 or 8.

And x2 on what everyone else said.

 

[sdenton8]

With the meth injection take the place of the intercooler? The benefits of cooling the temp and higher octane it adds

 

[SgtMarshal]

it will help cool some, but not a lot.

 

[dezldave961]

it will help cool some, but not a lot.

Correct, for the same basic cost, an intercooler setup will be more beneficial/consistent/no moving parts/etc. and still give you the freedom to add meth later, if you want to play with it down the road.