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One of the most influential elements of the Tri-Five was the recent development of their newest 265 cid (4,340 cc) V8 engine, which was first offered in 1955. [4] It was an overhead valve high compression, short stroke design that remained in production in various forms for decades.
Stiffer valve springs can help prevent valve float and valve bounce but at the expense of increased friction losses, higher stresses, and more rapid wear in the valvetrain. Various techniques have been used to offset the effect of stiffer springs, such as dual-spring and progressive-sprung valves, roller-tipped tappets, and pneumatic valve ...
Performance modifications included a "hot" camshaft (in reality, just a camshaft used in various applications during the '70s with .440"/.440" lift and 196°/208° duration at .050"), stiffer valve springs, a larger vibration damper (same as all '73-'79 350s, 403s, and 455s), a Y-pipe dual-outlet exhaust system, and richer secondary metering ...
Lap 93: The valve spring on Jim Reed's vehicle started acting strangely. Lap 95: The oil pressure on Gene Stokes' vehicle suddenly became abnormal. Lap 111: Ralph Earnhardt took over the lead from Ned Jarrett. Lap 113: Axle problems took Jimmy Thompson out of the race. Lap 128: Problems with the vehicle's bearing took Nelson Stacy out of the race.
The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline-powered, V8 engines that was developed and have been produced by the Chevrolet Division of General Motors from the late 1950s until present. They have powered countless General Motors products, not just Chevrolets, and have been ...
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