Power shifting is a technique used by drag racers in order to achieve faster acceleration and lower elapsed times during a race. To power shift a manual transmission vehicle, after inital launch and upon reaching the engine's power curve peak, you must keep the accelerator fully depressed, apply the clutch, upshift, and release the clutch. This must be done quickly and smoothly in order not to damage the engine by over revving during the shift. Power shifting is used only for upshifting, never for downshifting.
If you power shift while drag racing
, you'll achieve a shorter quarter mile elapsed time.