Re: Auto drag launching???
Optimal shift point will be the rpm where your engine is making max hp. If you leave the shifter in D and it changes gear at or within 200 rpm on the low side of that rpm, then for a near standard car that should be fine. If not, then select the gears manualy, keeping an eye on the tachometer obviously. Redlining in each gear will cost you time, as once you go past your engines peak hp, both hp and torque are dropping off. In an ideal situation, you should hold each gear until peak hp rpm, then when you shift the revs should drop down to near peak torque rpm.