96 myztic

Underdrive pullies on a supercharged engine will just lower/change your target boost. The pullie size on the blower, and relative psi, is set with a stock underdrive setup so if you change the water pump, alternator and crank pully ur gonna throw that all off and make a different psi then u are supposed to.

You can see this on the 03-04 cobras when they change the "lower" to a different # then stock and get a different resulting psi (hp/tq) setup.