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General Motors began offering a newly developed 572 cu in (9.4 L) in 1998 [45] to the aftermarket via its GM Performance Parts division. This engine has a bore and a stroke of 4.56 in × 4 + 3 ⁄ 8 in (115.8 mm × 111.1 mm).
Vortec is a trademarked name for a line of gasoline engines for General Motors trucks. The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber , creating a better air / fuel atomization. [ 1 ]
The 305 is sometimes dismissed in performance circles because of its lackluster performance, small bore size, and difficulty flowing large volumes of air at high rpm. However, two variants of the 1983 to 1992 305 were notable performers: the 1983–1988 L69 High Output 5.0L (only used in late 1983–early 1986 F-body and late 1983–1988 Monte ...
GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in 3 (1980-1983). These use a Chrysler custom Torqueflite 904 automatic transmission with an integral Chevrolet bellhousing.
The 250 engine continued to be used in GM trucks until 1984, after which it was replaced by the 4.3 L V6 (essentially a 350-cubic-inch (5.7 L) Chevy small-block V8 with the two rear cylinders removed). It was also used in a number of large sedans by Chevrolet of South Africa until 1982.
In contrast to the higher-performance 454 SS, the Sport Equipment Package was offered with the 4.3 L V6, 5.0 L V8, and 5.7 L V8 engines. [21] Two-wheel-drive versions were offered with an upgraded ZQ8 heavy-duty suspension option, including heavy-duty shocks and high-ratio steering. [20]
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