Launch RPM

[weedburner]

Originally Posted by james schaechter

Typically, in a our stocker we see a 200-300 rpm spike of driveshaft rpm at each gear change.

If the clutch is used on the shifts, there's little if any spike. Because the slipping is basically a hydraulically timed event that re-sets when the pedal is bounced off the stop, rpm loss after the shift occurs over an extended time period much like the launch. Rather than jerking rpm almost straight down until a PP with centrifugal can relax, the loss will look more diagonal on the graph. Because the car is gaining speed while the clutch is slipping, spreading rpm loss over more time reduces both it's quantity and intensity, making that returned energy more likely to do productive work rather than go up in a blip of wheelspin.

If you are clutchless it can still help you launch higher, but you will still need an adjustable/centrifugal to get some slip on the shifts.

Grant