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Intended as a low compression progression from the previous years Ram Air IV engine, all 1971 455 HO engines used a heavy duty 4 bolt main block, round port cylinder heads (casting #197; with 8.4: compression), "Ram Air" style exhaust manifolds, and a two-part aluminum intake manifold. The 1971 Pontiac 455 HO was Pontiac's first engine to ...
In 1981 it underwent some changes and offered a conservatively rated 200 hp (149 kW) and 340 lb⋅ft (461 N⋅m) of torque. [1] The Turbo Trans Am was first added to the Pontiac model lineup in 1979 as a 1980 model year, and was the first production Pontiac V8 engine to use forced induction; in this case through an exhaust-driven turbocharging ...
The third generation Pontiac Firebird was introduced in late 1981 by Pontiac alongside its corporate cousin, the Chevrolet Camaro for the 1982 model year. These were also the first Firebirds with factory fuel injection, four-speed automatic transmissions, five-speed manual transmissions, four-cylinder engines, 16-inch wheels, and hatchback bodies.
The Pontiac Firebird is an American automobile built and produced by Pontiac from the 1967 to 2002 model years. [1] Designed as a pony car to compete with the Ford Mustang , it was introduced on February 23, 1967, five months after GM's Chevrolet division's platform-sharing Camaro . [ 2 ]
The L98 V8 was optional in January 1987–1992 Chevrolet Camaro and Pontiac Firebird models (rated at 225–245 hp (168–183 kW) and 330–345 lb⋅ft (447–468 N⋅m)) The 1987 versions had 20 hp (15 kW) and 15 lb⋅ft (20 N⋅m) more and a change to hydraulic roller camshaft. Compression was up again in 1990 to 9.5:1 Camaro/Firebird and 10: ...
Also called the GM small corporate pattern and the S10 pattern. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations.
1981 became the final year for the second generation Pontiac Firebird. The three engine options were unchanged for the model line-up, however, the option for a four-speed Borg Warner Super T-10 was re-introduced for the Formula and Trans Am, but was only available with the Chevrolet sourced LG4 305 5.0 liter V8.
The engineers considered developing smaller displacement versions of the existing V8, a V6 derived from the V8, a V4 derived from the V8, and an inline-four derived from one of the cylinder banks of the V8 (in the same fashion as the 1961 Pontiac Tempest's "Trophy 4" engine), but ultimately decided to create an entirely new four-cylinder engine.
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