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From 1952 to 1954 two compression ratios were specified, 6.8:1 with synchromesh (manual) transmission, and 7.7:1 with Hydramatic automatic transmission. [4] The engine had a remarkably low idle speed of 450 rpm with standard transmission and 375 rpm (while in drive) for the automatic; [ 5 ] a modern engine is usually tuned to a minimum 600-700 rpm.
Power ratings increased with the increase in displacement and compression ratio: (with manual transmission) Two-barrel carburetor, 8.5:1 compression, 227 hp (169 kW) at 4600 rpm, 333 lb⋅ft (451 N⋅m) at 2300 rpm; Four-barrel carburetor, 10:1 compression, 244 hp (182 kW) at 4800 rpm, 350 lb⋅ft (475 N⋅m) at 2600 rpm (with Hydramatic)
The Pontiac straight-6 engine is a family of inline-six cylinder automobile engines ... (30 kW; 41 PS) at 2400 rpm when it was introduced. The compression ratio was 4 ...
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 ...
Introduced in 1981, the 2.8 L (2,837 cc) LH7 was a High Output ("Z-code") version of the LE2 for the higher-performance X-cars like the Chevrolet Citation X-11 and higher-performance A-cars like the Pontiac 6000 STE. It retained a two-barrel carburetor and produced 135 hp (101 kW) and 165 lb⋅ft (224 N⋅m) for 1981 and 145 lb⋅ft (197 N⋅m ...
The '69/'70 "round-port" RA IV engine, a derivative of the '68½ "round-port" RA II engine, was the most exotic high-performance engine ever offered by PMD and factory-installed in a GTO or Firebird. The 1969 version had a slight advantage as the compression ratio was still at 10.75:1 as opposed to 10.5:1 in 1970.
The 301.6-cubic-inch (4.9 L) GMC inline six was produced from 1952 to 1960, when it was replaced by the V6. It has a square bore/stroke ratio of 4 by 4 inches (101.6 mm × 101.6 mm). This is the largest raised-deck engine. It was originally designed for the GMC military M135 and M211.
The Pontiac Streamliner is a full-size car produced under the Pontiac brand by ... engine with a 6.2:1 compression ratio generating 100 bhp @3,800 RPM while the ...