[SSZero]

Originally Posted by 95 GSXracer

Depends on the car. In a grocery getter it will be "tuned" to shift at relatively low rpm. On sports cars they are typically programed to shift at the optimum rpm for accelerating. Someone I know ran a 3g eclipse and shifting manually it was never faster than letting it do it on its own, no matter what he tried. But as variable change so will optimum shift points. The tranny is programmed for a stock motor with stock HP curve. A modified motor may need to shift at higher rpm, etc. Only way to find out is to do both and see what works. We can all discuss this on the internet all day, but in the end the timeslips will be more accurate

Yeah, that's true. But hey, if all else fails, shiftronic will save me...