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The ZR1 Corvette is one serious piece of American metal, with the athleticism of a track star and the brute power of drag racer. While light weight materials, magnetic damping and 15.5-inch Brembo brakes sounds impressive, the real meat lies under the hood of the fastest ever production Corvette. GM's supercharged 6.2L small block V8 packs at least 620 hp and nearly 600 lb-ft of torque, and its duty is to finally put the Corvette into the supercar club. We were lucky enough to spend some time with Ron Meegan, the assistant chief of GM's small block engine program, and he gave us an engineer's view of the supercharged LS9 engine. Hit the jump to learn why GM didn't use the 7.0L V8 from the Z06, why the Eaton supercharger is so special, and whether or not GM is being modest with the ZR1's projected 620 hp rating.

Related Gallery2009 Chevrolet Corvette ZR1