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The 1973–1974 L82 was a "performance" version of the 350 that still used the casting number 624 76cc chamber "2.02" heads but with a Rochester Quadra-jet 4bbl carburetor and dual-plane aluminum intake manifold, the earlier L46 350 hp (261 kW) 350 hydraulic-lifter cam, and 9.0:1 compression forged-aluminum pistons producing 250 hp (186 kW ...
The 4.3 L (262 cu in) V6 has a 4 in × 3.48 in (101.6 mm × 88.4 mm) bore and stroke, identical to the 350 cu in (5.7 L) Chevrolet V8 engine. To create a true even-fire engine, Chevrolet produced a crankshaft with 30-degree offsets between each rod pin. Consequently, rod journals were increased to a larger 2 + 1 ⁄ 4 inches (57.2 mm).
For example, if the static compression ratio is 10:1, and the dynamic compression ratio is 7.5:1, a useful value for cylinder pressure would be 7.5 1.3 × atmospheric pressure, or 13.7 bar (relative to atmospheric pressure). The two corrections for dynamic compression ratio affect cylinder pressure in opposite directions, but not in equal strength.
The LT-1 had an 11.0:1 compression ratio, Holley 780 cu ft/min (22 m 3 /min) 4-barrel carburetor, and solid lifters. For the first year the LT-1 was rated at 370 hp (276 kW) in the Corvette and 360 hp (268 kW) in the Camaro, both of these being brake horsepower (bhp) gross hp ratings.
The addition of two milled cutouts [in the head] to extend the volume of the combustion wedge can create a compression ratio of 7.5:1; one milled cutout produces a 9.5:1 compression ratio. The difference between the volume of these cutouts provides a wide compression range without making any changes in the piston or cylinder head.
The Chevrolet Stovebolt engine is a straight-six engine made in two versions between 1929 and 1962 by the Chevrolet Division of General Motors.It replaced the company's 171-cubic-inch (2.8 L) inline-four as their sole engine offering from 1929 through 1954, and was the company's base engine starting in 1955 when it added the small block V8 to the lineup.