Originally Posted by DansM
That makes sense. Jus to clarify it doesn’t affect water pump or AC pump while running at higher RPM, IE track conditions, yet still delivers power? How? Is the MS pulley the same diameter but made with lighter material hence creating less parasitic drag?
Slightly lighter, as well as slightly spinning the accessories slower - freeing up power due to less parasitic drag.
Most crank pulleys on the market today are relatively similar sized, with exception of the Dinan unit.