Supercharging of Knoxville

[hugheswho]

I'm looking to see if anyone has the original documentation for the Paxton supercharger from Supercharging of Knoxville with Paul Burch. My mechanic needs this information to fix a power loss problem at 3,000 rpm.

911SC PORSCHE * PAXTON SUPERCHARGER

Performance Data - -1981 SC with SST heat exchangers:

300 HP SAE @ 6200 RPM
302 LBS TORQUE @ 4300 RPM
0 TO 60 IN 5.0 SECONDS

Kit Details/Requirements:

Installation Time - 28 hours
Preferred Compression Ratio (C.R.) - 8.5 - 9.3:1
Low C.R. - 8.5:1
High C.R. - 9.8:1 (not recommended)

Modifications Required - A turbo tail is required. The air-conditioning condenser must be relocated (to a different location in the turbo tail) which requires extending the air-conditioning lines 10 inches. (The turbo tail and air-conditioning work is not included in the kit or the kit price.)

Optional Modifications - Raceware head studs and rod bolts are recommended, but not mandatory. The stock clutch may be retained, but the factory sport disc and lightweight clutch assembly are recommended, particularly if the clutch is to be replaced anyway.

If the serpentine belt option is selected and air-conditioning is used, a serpentine belt pulley will be required for the compressor. This requires changing the compressor clutch, which is part of the serpentine belt kit.

Miscellaneous - The nominal maximum boost available with the standard Paxton impeller is 5.0 psi. With the optional impeller it is 6.0 psi. (Note: Some installations may exceed these figures) Because there is less belt slippage, installations with the serpentine belt option will exceed these figures, often approaching 8 to 9 psi boost.

If the supercharger is to be used in conjunction with a 3.2 modification (displacement increase) the C.R. will have to be lowered to the 8.5 - 9.3:1 range. Most 3.2 kits are 10.0:1 C.R. The C.R. can be lowered by using a 1mm head gasket, but we strongly encourage doing it the right way, i.e. by machining.