Thread: 6-71 supercharged 302 help needed

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My only experience with a supercharger was on a tiny 1300 cc VW with a positive displacement vane-type Judson compressor. So far nobody has said anything about heat. For a 10-12 second run in the quarter mile this may be the least of worries but reading the original beginning of this thread he says only occasional drag use with probably a street cruiser use most of the time. Adding 30% more fuel-air mixture means 30% more heat. In my case it meant a melted piston while on a trip from Virginia to Florida and two trips to emergency garage service to get home. The first stop was to replace the melted piston but the VW mechanic did us a favor by washing down the engine with Varsol. The second stop was about 90 miles up the road when the combination of engine heat and Varsol melted the wiring loom. Amazingly the second stop at another VW agency only cost us $12 for the complete engine wiring loom (plus meals and another night's lodging!) For regular running of a supercharged engine probably lower psi is adviseable for longer engine life and forged pistons would seem to be a good idea but don't forget provision for extra cooling too!

Don Shillady
Retired Scientist/teen rodder