Just wondering if anyone has any info on meth injection for a GTP. My buddy just got a kit for his Cobalt SS(turbo) and he thinks it'd be a good idea for my GP. Wondering about how much knock it eliminates, prices, difficulty of installation, ease of tuning, etc.

Meth' is nasty stuff....very corrosive your S/C won't appreciate it.
Try Ethanol.
The octane rating of both is around 107.
Tuning is not too bad,but you have to keep an eye on it.
Once you get it in the ball park,it shouldn't be too hard to keep a reasonably safe tune.

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2005 GT owner [Non S/C] with a "big DIC".
Two years later and I still love the car.
Thanks Pontiac...Bleen is keen!

Grab a set of 60# injectors, and run Ethanol. L67/L32 LIM design will not evenly distribute the methanol, most likely leaving cylinders 1 and 2 lean, the chance of chipping a piston is much greater.

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'04 GP CompG - 2.6" junk

"Meth is a hell of a drug."

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

I wanna go fast!

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One Big Ass Mistake America

water/meth injection is great if you set it up right. Cools the incoming air, works especially well with an intercooled car like your friend's Cobalt SS. If you can have your tune setup right I say go for it. Better yet run e85 and water/meth.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6