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To permit usage of the lower-octane fuels, all engines featured low compression ratios (9:1 and lower; well below the 10.25-11.25:1 range on high-performance engines of 1970 and earlier). This move reduced horsepower ratings on the big-block engines to 300 for the 402 cubic-inch V8, but the LS5 454 option had an "advertised" five-horsepower ...
For the 1970 model year the 396 was bored 0.03 in (0.76 mm), resulting in a 402 cu in (6.6 L) engine. Despite this, the motor was still badged as a 396. 1970 was also the final production year for the L78. Although 1970 LS6 Chevelles are generally more collectible today, 1970 L78 Chevelles are in fact rarer (4,475 units versus 2,144).
Chevrolet Performance has aided in the development of many high-performance vehicles. The 2019 Corvette ZR1 was released at the 2017 Los Angeles Motor show by Chevrolet Performance officials. The car is powered by a supercharged LT5 V8 engine that produces 755 horsepower and 715 foot pounds of torque with high octane fuel and high density air.
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The AHRA ASA (Showroom Stock Automatic) Class record-holding Chevelle LS-6 for the 1970 racing season posted a best-of-season trap speed of 106.76 mph (172 km/h), [40] which suggests something on the order of 350 "as installed" (SAE Net) HP for a 3,900 pounds (1,769 kg) car-and-driver combination.
Super Sport, or SS, is the signature performance option package offered by the Chevrolet division of General Motors on a limited number of its vehicles. All SS models come with distinctive "SS" markings on their exterior.
The L72 was a 427 cu in (7.0 L) 90° overhead valve V8 big-block engine produced by Chevrolet between 1966 and 1969. Initially rated at 450 horsepower, the rating dropped to 425 hp (317 kW) shortly after its release (although there was no change in power).
The American Auto Racing Writers & Broadcasters Association named him to their All-America Team in 1972, and he was awarded Chevrolet's of Performance in 1984. [ 6 ] Jenkins was selected 21 times to the Car Craft all-star drag racing team including winning the "Man of the Year" and "Ollie Award".