LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Dyno numbers are in. Had a big day:) with vid!!

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Old 06-17-2012, 09:14 PM
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Porting wouldn't hurt.
I only had my heads pocket ported, and I have picked up 10-15whp.

My car is only crossing the line at 5400rpm in 3rd. I shift at 6800, so I need less cam, or more gear since I am not able to use all of my power.

On the highway, the 3.69 gears are perfect. 3rd gear acceleration is awesome.

Don't worry though... I have a few more tricks up my sleeves!
Old 06-17-2012, 09:16 PM
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Just spent the day at an all Pontiac show, and had a blast. Lots of nice cars. Saw a 08 GP GXP that was all stock.



Quick Reply: Dyno numbers are in. Had a big day:) with vid!!



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