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Displacement began at 287-cubic-inch (4.7 L) and grew as large as 455-cubic-inch (7.5 L) by 1970. Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines.
A 2.7-liter, 232 hp (173 kW) Super Duty engine powered the 1984 Fiero Indy Pace Car to over 138 mph (222 km/h) during the race, but Super Duty engines were never available in factory-built GM vehicles. However, GM sold the Super-Duty-specific parts at authorized dealers and all of the parts required to convert a stock Iron Duke engine to a ...
One holdout to this industry-wide slide was the Super Duty 455 engine of 1973–1974. Available only in the Firebird Formula and Trans Am models, this was rated at 310 hp (230 kW) net initially but after having issues passing EPA emissions tests, the camshaft was changed to the old RA III cam, and with the change, came a 290 hp (220 kW) net rating.
The base 455 produced 40 fewer horsepower than the round port Super Duty 455. Horsepower for the base L75 455 was rated at 250 at 4,000 rpm and 370 lb/ft at 2,800 rpm. Pontiac removed the H.O. designation from the base engine, and simply decaled the now non-functioning shaker with "455".
The base 455 produced 40 fewer horsepower than the round port Super Duty 455. Horsepower for the base L75 455 was rated at 250 hp (186 kW) at 4000 rpm and 370 lb⋅ft (502 N⋅m) at 2800 rpm. Pontiac removed the H.O. designation from the base engine, and simply decaled the now non-functioning shaker with "455".
You’ve probably heard that the health of your nails can clue you into the health of your whole body. But that’s not the only reason to keep your nails in top condition.
The standard 1965-1967 425 cu in (7.0 L) was called the Super Rocket, and was the most powerful engine option for the Oldsmobile 88 and 98 of 1965-1967. Compression ratios of 9.0:1 at 310 hp (230 kW) or 10.25:1 at 360 hp (270 kW) were available in the U.S.
TV viewership for NFL games has also slowly increased in the UK, with a small but dedicated fan base watching more and more games, and last season's Super Bowl smashing the single-game viewing record.
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