Re: Info on Underdrive pulleys

["Billy T." <btylaska@onramp.net>]

this is straight off the page:


An underdrive pulley is a pulley that is *smaller in diameter* than the
pulley it replaces. Any of the accessory pulleys
(alternator, air pump, power steering, and water pump) including the
crank/eccentric shaft pulleys can function as an
underdrive pulley. UNORTHODOX RACING underdrives the accessories by
changing the diameter of the
crank/eccentric pulley. This allows us to lessen the drain of each of
the accessories off the crankshaft but also, most
importantly, reduce the weight of the crank pulley.