I hold RPMs at about 4000, when lights come down stab the throttle and dump the clutch right at 6k. I find the car leaves harder this way than just holding the RPMs at 6k and dumping it. You have momentum from the flywheel accelerating when you stab the throttle.
Powershifting, hell, just don't let your right hand get ahead of your left foot. Learn to powershift cleanly and the speed will follow.
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