Chevrolet's largest displacement and final, big block engine for production vehicles was the 496-cubic-inch 8.1L Vortec. The 8100, as it's sometimes called, was the last big block engine derived ...

1,000 HP E85-Fed 496-Inch Blown Big-Block Chevy Walkaround on the Westech Dyno A walkaround of a blown 496-inch big-block Chevy engine warming up on Westech's Superflow 902 dyno.

E85-Fed 496-Inch Blown Big-Block Chevy Makes Over 1,000 HP On Westech Dyno. The E85 dropped intake temps by 85 degrees!