Early Corvette Big-Block Engines - True Power
Just How Powerful Were Corvette's Early Big-Blocks?Early in the '66 model year, the 427ci L72 engine was rated 450 hp at 6,400 rpm. Not long after production began, the rating was lowered to 425 hp at 5,600 rpm. There were no changes to the engine, but Chevrolet's central office apparently realized that 450 hp would attract the attention of safety minded politicians and insurance companies. Also, there seemed to be an unwritten agreement between Ford, Chrysler, and GM that no engine would be rated over 425 hp no matter how powerful it was. In 1967, Chevy broke that rule by rating the L71 (triple two-barrel carb, solid-lifter, 427ci) engine at 435 hp. The L71 was identical to the '66 L72 except for the intake system. The L72 had one four-barrel carburetor compared to the L71's Tri-power setup.
Photo Gallery:
Chevy L71 Corvette Engine - Triple Two-Barrel Carb - Corvette Fever Magazine
Photo Gallery:
Chevy L71 Corvette Engine - Triple Two-Barrel Carb - Corvette Fever Magazine
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Early Corvette Big-Block Engines - True Power
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