pisc pulley
8 sec potential, 12 sec slip
iTrader: (50)
Joined: Apr 2002
Posts: 4,092
Likes: 2
From: Savannah, GA
my p1sc made 14psi of boost with a 7.65" crank and 3.4" blower pulley with an unrestricted air path to the supercharger on a 347 with stock truck heads and a 9.5:1 compression ratio
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 P-1SC.
* 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.
The standard crank pulley that comes with the ProCharger six rib kit is a 6.0" diameter. The eight rib ProCharger crank pulley is a larger 7.65 diameter, which would help you out quite a bit. Bob
* Cubic inch. The larger the engine the less boost it will make with a P-1SC.
* 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.
The standard crank pulley that comes with the ProCharger six rib kit is a 6.0" diameter. The eight rib ProCharger crank pulley is a larger 7.65 diameter, which would help you out quite a bit. Bob
