GETTING REVVED UP: Mark Phelan takes a look inside the new Corvette ...

The supercharged 6.2-liter V8 will produce more than 620 horsepower when it goes on sale in the 2009 Chevrolet Corvette ZR1 this summer. It is the most powerful production engine in General Motors' history, and should get 28-30 m.p.g. in highway driving.

Supercharger

The sixth-generation supercharger from Eaton Corp. uses a brand-new design that has four lobes to compress air and boost engine output. Previous superchargers had just three lobes that twisted just 60 degrees. The extra lobe and the new blower's 160-degree twist help it to compress air more efficiently, reducing fuel consumption.

Piston

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