HP tuner advice?
My question is with out a dyno to tune the car what would the most common changes be to the ECM to help performance?
The tranny is WAYYYY to soft, I want MUCH faster shifts, speed gov, rev-limmiter and so on?
Thanks.
The a/f ratio and timing aren't too bad on the gxp's. Way more aggressive than the LS1 tune at least.

