Wait... I think you had it right the first time. Larger driver, smaller driven would make the driven spin faster. Smaller driver, larger driven would make the driven spin slower, which is what you want. Right? Car audio nuts will stick a "racing pulley" on their alternator. It is smaller in diameter, and therefore, while the surface speed (controlled by the speed of the belt) remains the same, the alternator operates at higher rpms, increasing output.Originally posted by golovko@Dec 30 2003, 01:33 PM
what stock pulleys do UDP's replace? If they replace the pulleys on the accessories, then they should be smaller, if they replace the pulley on the crank alone, then they (it) should be larger - if my thinking is correct.
edit: i had it backward