Street Ultra 582: Hardcore Horsepower’s 805 HP Pump Gas Big Chevy
[portfolio_slideshow id=57687] Back in 1999, Mike Petralia at Hardcore Horsepower & Dyno Shop in Franklin, TN built a 556-cubic-inch big block Chevy test mule for Hot Rod magazine. That engine made 790 horsepower at 6,700 rpm and 656 ft.-lbs. of torque at 5,700 rpm on pump gas. That was a ton of power back then, and more than
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