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The 389 would remain the standard Pontiac V8 engine through 1966, offered in a bewildering variety of outputs ranging from 215 to 368 hp (160 to 274 kW). The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966.
Being nearly identical, it too has the distinctive odd-sided hexagonal shape. These engines can be fitted in rear wheel drive vehicles with the right bellhousing and are used in hot rods, kit cars, sand rails and late model engine swaps. All Cadillac Northstar V8s; Oldsmobile Aurora L47 V8; GM 3.5L LX5 "Short Star" V6
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 ...
Pontiac V8 engine; VVT-i This page was last edited on 20 June 2024, at 09:03 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
The exception was the optional 425 hp (317 kW) 427 cu in (7.0 L) Turbo Jet V8 was no longer listed, leaving the 385 hp (287 kW) 427 as the top engine. The three-speed Turbo Hydramatic transmission that previously only available with the 396 cu in (6.5 L) and 427 cu in (7.0 L) V8s was now optional with the 275 hp (205 kW) 327 cu in (5.4 L) Turbo ...
Heads used on the high performance 409 and 427 engines had larger ports and valves than those used on the 348 and the base 409 passenger car and truck engines, but externally were identical to the standard units – but for the location of the engine oil dipstick, on the driver's side on the 348 and the passenger's on the 409/427.
For 1958, GMC reduced the bore of Pontiac's 370-cubic-inch (6.1 L) to 3.875 in (98.4 mm), resulting in a displacement of 336-cubic-inch (5.5 L). (In Canada, however, GMC used the Chevrolet small-block engine rather than the Pontiac.) For 1959, as the Pontiac engine's stroke was lengthened to 3.75 in (95.3 mm), a further bore reduction to 3.78 ...
At the height of the horsepower era, Pontiac engines reached ratings of 390 hp (291 kW; 395 PS) (SAE gross), though other engines achieved considerably higher outputs. Federal emissions laws eventually brought the horsepower era to a close and resulted in a steady decline for Pontiac's engines. One holdout to this industry-wide slide was the ...
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