1972 340 Demon

1968 Dodge Dart GT Sleeping Beauty?
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It was a walk through the SEMA (Specialty Equipment Market Association) Show that prompted Norm to get the idea of adding supercharged power to the 1972 Demon 340, creating another GSS high-performance car, and one that would actually take advantage of this lowered compression ratio of the 340. A deal was worked out with Joe Granatelli at Paxton Products, who were suppliers of belt-driven, centrifugal superchargers. This system was calibrated to work on the small block Mopar® engine, using the stock Thermo-Quad carburetor, albeit completely sealed-in with a pressure box.

Besides the actual supercharger, the ’72 340-cid engine was treated to a set of Crower aluminum valve spring retainers, modified fuel pump, fuel pressure regulator, Milodon competition oil pump, re-curved (Chrysler electronic ignition) distributor, re-jetted and re-calibrated carburetor, full-capacity hoses, oversize pulleys and a special high-capacity air intake filter (located on the passenger’s side radiator support panel). This belt-driven supercharger turned out to be the perfect response to the lower factory compression ratio for the 340-cid engine, as the new, lower 8.5:1 pistons were ideal for blower applications.