The supercharger is driven by a series of gears and shafts connecting the flywheel to a planetary drive, finally spinning a dog-shifted two-speed shaft attached to the impeller.[33] Throttle control is electronic.[34] A centrifugal supercharger has the advantage of generating less heat than other designs, especially scroll-type or screw-type superchargers.[33][22] Without an intercooler (which the H2 lacks), excess heat in the intake charge can cause pre-ignition that can damage or destroy the engine.