DisasterpeaceWS6

iTrader: (1)

Anyone have any idea what psi the 3.70 pulley makes on a P1SC-1 ?

Bob@BruteSpeed

iTrader: (16)

How much boost the blower can produce depends on many variables.
* Cubic inch. The larger the engine the less boost it will make with a supercharger.
* Headers and exhaust. A better flowing system will produce less boost, requires a smaller pulley to regain the loss in boost. Ultimately though, more power will be gained.
* Camshaft and heads. A camshaft with some overlap will leak out some boost through the valves. Better flowing heads react a lot like a better flowing exhaust system.
* Altitude. Elevation plays a big part in how much boost is produced. Those people living in the higher elevations have to spin the blower harder to see boost.
* Condition of engine. An engine with real good sealing rings will ultimately produce more boost than one with worn rings.
* Rpm. An engine that is spun up higher in the rpm range will normally produce more boost.

6 rib uses a small 6.0 dia crank pulley, 8 rib uses a larger 7.65 dia crank pulley. Bob