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I did the tune on my 2007 Gxp Automatic.

I can feel the increase in power, although I havn't floored it or anything. Us auto drivers dont spin the tires as often, although for some reason she likes to chirp when i'm turning right from a stop (more often on the right???)

With the waste gate adjustment, pre-tune, my psi was hitting 18.
After the tune I was hitting 23 but got a knocking sound from the engine. After driving for about 50 miles the knocking sound went away. I adjusted the waste gate back to stock anyway though. I hit 22 psi yesterday with the WG at stock, so I dont think it's limited at all.

I've been playing with air intakes recently, trying to decide to use my stock or Dejon one. All in all though I'm pretty happy with the tune.
My gas milage has gone up 2 points. Normally mine is pretty low because I do a lot of stop and go driving, and I like to go fast. Even with all of the crazy stuf I do though it's still 20-ish.

For some reason I just can't bring myself to floor it though ,,,, gotta get over that problem.

__________________
Mark........
07 Cool GXP with all of the fixins.
Painted calipers, mud flaps, painted engine cover,
Dejon CAI and IC Pipes, lil chromies, JPM visor covers and center console, Westers Hot Tune, Stripes from ASAP Signs (ClearBra)..Norm's Rear Facia, JPM Padded Leather Console Cover and soon a JPM Auto Shifter

	mrk Member Join Date: Jan 2008 Location: New Orleans	I did the tune on my 2007 Gxp Automatic. I can feel the increase in power, although I havn't floored it or anything. Us auto drivers dont spin the tires as often, although for some reason she likes to chirp when i'm turning right from a stop (more often on the right???) With the waste gate adjustment, pre-tune, my psi was hitting 18. After the tune I was hitting 23 but got a knocking sound from the engine. After driving for about 50 miles the knocking sound went away. I adjusted the waste gate back to stock anyway though. I hit 22 psi yesterday with the WG at stock, so I dont think it's limited at all. I've been playing with air intakes recently, trying to decide to use my stock or Dejon one. All in all though I'm pretty happy with the tune. My gas milage has gone up 2 points. Normally mine is pretty low because I do a lot of stop and go driving, and I like to go fast. Even with all of the crazy stuf I do though it's still 20-ish. For some reason I just can't bring myself to floor it though ,,,, gotta get over that problem. __________________ Mark........ 07 Cool GXP with all of the fixins. Painted calipers, mud flaps, painted engine cover, Dejon CAI and IC Pipes, lil chromies, JPM visor covers and center console, Westers Hot Tune, Stripes from ASAP Signs (ClearBra)..Norm's Rear Facia, JPM Padded Leather Console Cover and soon a JPM Auto Shifter