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One of the key upgrades were the 6x4 heads. The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top ...
Sometimes confused with the Buick designed and built 215 cu in (3.5 L) aluminum V8 that Pontiac had used in the two years prior, the "Pontiac 215" was an adaptation of Chevrolet's 194 cu.in. inline 6 currently produced and the new 230 cu in (3.8 L) overhead valve Turbo-Thrift straight-6.
A Silver streak 8 in a 1949 Pontiac Streamliner - note the large intake silencer leading to an oil-bath air cleaner on the left side of the engine. The Pontiac straight-8 engine is an inline eight-cylinder automobile engine produced by Pontiac from 1933 to 1954. Introduced in the fall of 1932 for the 1933 models, it was Pontiac's most powerful ...
1916–1923 Buick Non-Removable-Head; 1916–1927 Oldsmobile Series 30 inline-6; 1923–1930 Buick Removable-Head; 1923–1928 Oakland inline-6; 1926–1927 Pontiac Split-Head (also modified for GMC trucks) 1928–1936 Chevrolet Stovebolt; 1928–1950 Oldsmobile F-Series (also used in Buick Marquette) 1928–1954 Pontiac GMR (also modified for ...
The Pontiac 301 Turbo is an engine that Pontiac produced for the 1980 and 1981 Trans Am.It was a V8 engine with a displacement of 301 cubic inch which produced an officially factory rated 210 hp (157 kW) and 345 lb⋅ft (468 N⋅m) of torque in 1980.
The head used during this time was the so-called "rectangle port", named after its exhaust port shape. The 290 heads use smaller valves, 1.787 in (45.4 mm) intake and 1.406 in (35.7 mm) exhaust, corresponding with its small bore. The 343 and the AMX 390 use the same larger valve heads, 2.025 in (51.4 mm) intake and 1.625 in (41.3 mm) exhaust.
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It also features higher flowing cylinder heads sourced from the L92, a more aggressive camshaft with 0.551 in (14 mm) lift, a 10.7:1 compression ratio, a revised valvetrain with 0.236 in (6 mm) offset intake rocker arms, a high-flow intake manifold, and 47 lb (21 kg)/hour fuel injectors from the LS7 engine.