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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 ...
The top-oiler block sent oil to the top center first, the side-oiler block sent oil along a passage located on the lower side of the block first. All FE and FT engines have a bore spacing of 4.630 in (117.6 mm), and a deck height (distance from crank center to top of block) of 10.170 in (258.3 mm).
The big-block engines initially used a forged crankshaft with a stroke of 3.975" for the 1965-1967 425 and 400 CID versions; starting in 1968, both the 400 cu in (6.6 L) and the 455 cu in (7.5 L) big blocks used a stroke of 4.25 in (108 mm), with crankshaft material changed to cast iron except in a few rare cases.
The IO-390 was developed from the similar IO-360 engine, by using cylinders from the IO-580 [citation needed] to increase the O-360's cylinder bore. (Although the IO-390 cylinder assembly [ 4 ] is not the same part number as the IO-580, [ 5 ] the cylinder barrels of both have a 5.318 bore and 4.375 stroke dimension.)
A chassis dynamometer, informally referred to as a rolling road [1] or a dyno, is a mechanical device that uses one or more fixed roller assemblies to simulate different road conditions within a controlled environment, and is used for a wide variety of vehicle testing and development purposes. All Wheel Drive Chassis Dynamometer
The car returned full-time for 1991 as the No. 55 Pontiac sponsored by Jasper Engines, based in Jasper, Indiana. The team's original plan was a Winston Cup rookie campaign for popular USAC veteran and Indianapolis 500 starter Rich Vogler , but he perished while leading a USAC event at the Salem Speedway in Indiana in July 1990.
Champion spark plugs provided their dyno room. Towards the end of 1968, Kaplan enlisted help from Dan Byer, a retired engineer from AMC, to develop a new block casting. Using AMC 390 engineering drawings, they added more mass for four-bolt mains and improved the oiling system. A run of 50 blocks was contracted to Central Foundries in Windsor ...
Its block was bored out to 4.04 in (102.6 mm) but its 3.31 in (84.1 mm) stroke left unchanged, resulting in the 340 cu in (5.6 L) engine introduced for the 1968 model year. Anticipating higher loads resulting from racing operation, the engineers fitted a forged shot peened steel crankshaft instead of the cast steel unit used in the 318.