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In 1989, NASCAR changed rules requiring cars to use current body styles, similar to the Cup cars. However, the cars still used V6 engines. The cars gradually became similar to Cup cars. 1994 was the final year that V6 engines were used in the Busch Series, as many short track series had abandoned six-cylinder engines. In 1995, changes were made.
Triad Racing Technologies was a body parts and chassis supplier for NASCAR teams that ran under the Toyota manufacturer. The company was originally formed as Triad Racing Development before it was merged in late 2008 with Bill Davis Racing by Michael Held and Marty Gaunt.
GM also made extensive use of economies of scale for the LS: with the exception of the 4.8L and 7.0L engines, all variants used the same 3.622" stroke (with most of those variants using the same basic crankshaft casting), the 4.8L and 5.3L variants utilized the same block casting, and several variants used the same length connecting rod.
Chevrolet Performance, formerly "GM Performance Parts", is an automotive performance parts brand that sells everything from camshafts and cylinder heads to high-performance crate engines and upgrades for late-model Chevrolet vehicles. It was founded in 1967 to support the Trans-Am Camaro race teams.
One popular idea was to use 231–275 cu in (3.8–4.5 L) six-cylinder engines; instead of Cup Series' 358 cu in (5.9 L) V-8s. [5] [6] [7] In 1989, NASCAR changed rules requiring cars to use current body styles, similar to the Cup cars. However, the cars still used V6 engines. The cars gradually became similar to Cup cars.
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The maximum engine speed is 6,500 RPM. A 4.5 L version replaced the 3S-GTE as the engine used in Toyota's 500 hp (373 kW) Super GT race cars up to 2009 [citation needed] and a 5.0 L version was used in the Grand American Road Racing (Grand Am) Series. [8] Applications (calendar years): [2] Lexus LS 430 (2000–2006) Lexus GS 430 (2000–2007)
They are powered by small-block V-8 engines, usually of 355 to 368 cu in (5.8 to 6.0 L) of displacement, although larger or smaller engines can be used. Engine components are largely similar to those used in the Cup Series, but Whelen Modified Tour engines use a small four-barrel carburetor (rated at 390 cu ft [11 m 3] per minute, about half ...