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A SD-455 equipped engineering prototype Grand Am was built and tested, [4] but was later dismantled and destroyed. 1973 engines may have point or unitized ignition. 1974 engines may have point or unitized ignition or starting around May 1, 1974, HEI ignition. 1975 engines have HEI ignition. 1975 was the first year for the catalytic converter.
The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. The shaker wore the decals "455 H.O." like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft.
The Iron Duke engine (also called 151, 2500, Pontiac 2.5, and Tech IV) is a 151 cu in (2.5 L) straight-4 piston engine built by the Pontiac Motor Division of General Motors from 1977 until 1993. Originally developed as Pontiac's new economy car engine, it was used in a wide variety of vehicles across GM's lineup in the 1980s as well as supplied ...
Engine bay of a 1967 AMC Marlin with a 4-barrel 343 Typhoon V8 Engine bay of a 1969 AMC AMX with a bare V8 block. The new-generation AMC V8 was introduced in 1966 [17] It is sometimes referred to as the "Gen-2" AMC V8. The first version was the completely new 290 cu in (4.8 L) Typhoon V8 introduced in a special mid-1966 model year "Rogue" hardtop.
258 engine in a 1974 AMC Gremlin Engine bay of a 1980 AMC Spirit AMX with 258 and emissions controls The 258 cu in (4.2 L) was produced from 1971 through 1990. It featured an undersquare 3.75 in (95.3 mm) bore and 3.895 in (98.9 mm) stroke; it was otherwise similar to the 199 and 232 (Note: Starting in the mid-1970s the 258's bore and stroke ...
American Motors sold the tooling back to General Motors in 1974. [4] The engine was an odd-fire V6, meaning that TDC for the cylinders was not evenly spaced around the engine but grouped in pairs. The engines in Jeeps featured a heavier flywheel than the Buick version to help dampen vibrations resulting from the engine's firing pattern.
No four-speed manual transmission cars were produced. Performance tests from 1977 estimated 0-60 mph (97 km/h) time for the Can Am with the Pontiac engine at about 10 seconds, about the same as the previous year's Le Mans with the 455, and a 1 ⁄ 4-mile (0.40 km) time of approximately 17 seconds. It is estimated that 1133 Can Ams were produced ...
The Pontiac GTO is a front-engine, rear-drive, two-door, and four-passenger automobile manufactured and marketed by the Pontiac division of General Motors over four generations from 1963 until 1974 in the United States — with a fifth generation made by GM's Australian subsidiary, Holden, for the 2004 through 2006 model years.