Secondis the blower drive. The supercharger is attached directly to the crankshaft via a 2½-inch-wide tooth belt and externally drives the input shaft at 2.2 times engine (or crankshaft) speed ...

The blower pumps more air into the motor than normal atmospheric pressure—about 14.5 psi—can push in. Remember, an engine runs on air—the expansion of air. Air expands when it is heated.

They share a standard shaft dimension of 8 by 1/2 by 8 in. The units are categorized as permanent split capacitor (PSC), totally enclosed, air-over units. All models are thermally protected, CSA ...