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post #1 of 7 (permalink) Old 11-21-2010, 05:33 AM Thread Starter
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Gxp whp

What is the stock WHP for a GXP? I know Gm rates they at 260HP. I'm thinking about getting mine dyno tune.
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post #2 of 7 (permalink) Old 11-21-2010, 06:37 AM
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220-230 I believe.
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post #3 of 7 (permalink) Old 11-21-2010, 07:36 AM
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i made 220

V-8 B8
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post #4 of 7 (permalink) Old 11-21-2010, 07:54 AM Thread Starter
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Thanks guys
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post #5 of 7 (permalink) Old 11-21-2010, 08:20 PM
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yea, ive never dyno'd my car but it feels in the 200-220 range. this is my opinion on my non stage2 gxp.

07 gxp SOLD
another ecotec project in the works....
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post #6 of 7 (permalink) Old 11-21-2010, 10:41 PM
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Dave has my car. He did a tune and measured 305 HP at the wheels. It has charge tubes, Dejon IC Solo high flow cat, and GMPP tune parts. He said it was putting down about 370 ft pounds. All after he tuned it.

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post #7 of 7 (permalink) Old 11-21-2010, 11:42 PM
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on my '07 gxp 5MT, stock (no tune) w/ a K&N filter in the factory airbox and SOLO performance street race exhaust, i put down 238WHP and 242WTQ on a DynoDynamics. 400ft elevation, 65deg, can't remember the humidity or correction.
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