My best sugestion is start around 5250rpm and increase in increments of 250rpm until you find your best times. Picking your best shift point, and finding your best ET takes many many passes down the track till you find whats best for your car. Good luck. As well as launching, stick to a constant launch time which finding your best shift point, there's no point and changing both your shift and launch's at the same time cause you won't know which is helping/hindering.
Good luck
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