15% is pretty universal. If you take the 300hp that a stock GT is rated at, 15% off of that is 255, which is right around where I have seen stock GT's run on the dyno, a few are actually higher.
Frank
15% is pretty universal. If you take the 300hp that a stock GT is rated at, 15% off of that is 255, which is right around where I have seen stock GT's run on the dyno, a few are actually higher.15% is a realistic number. probably not even that much.