All that you need to change is the blower pulley to get more boost from your charger. Changing of the crank pulley is not really needed, but by getting a smaller crank pulley will make it easier on the engine to create the HP. I just changed the blower pulley and mine worked out fine.
The size is 2.93" for a 9lb pulley. The part number for the pulley is PD-D10045-293 and will cost $60.
The By-Pass Valve is a pressure-release valve that allows air that is being forced down the throat of your motor to be by-passed back into the supercharger for later use. The By-Pass increases reliability for your motor and your supercharger and will give you smoother idling, due to a reduction in blower surge. If you are running at pressures of 7psi or above, then it is deffinately mandatory to run a By-Pass Valve or your chances of damaging head gaskets, rings, seals, or other important parts of your engine are extremely high.
Powerdyne makes a standard by-pass valve and will install in about 20 minutes and cost $130. The part number for your '92 is
PD-A10261-011.
You can still use the stock 12:1 FMU with 9lbs of boost and your 155lph fuel pump will be able to handle the extra power even though you can never have too much fuel if you do decide to go with a higher fuel system at a later time. Fuel equals power.
Well, good luck.
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94 Mustang GT
93 Mustang, LX, convertable, red, supercharged powerdyne 9lbs, aod w/ shift kit, 3.55s, performer manifold, ford motorsports shorty headers, flowmasters, eibach sport springs, chrome cobra rims
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