Originally posted by AcsRcool
pulleys are bad because they change the turns ratio between the engine and the alternator. this means that the electrical system of your car, which relies on a certain amount of cycles per unit time from the alternator to generate the power it needs, will suck more power then you can create. It's not so horrible if you dont have a system, but if you do, I would highly recommend you not do this mod. . .
yeah i was gonna say what you've just said.
on top of what he has mentioned, if you want to run the big system in your ride, i would get an additional optima battery in your trunk to back up your alarm & run the sound system with it & get the 1farad heavy duty capacitor for your subs.
then you will be very safe to do the pulley mods.
$.02