273 V8
The 273 (4.5 L) was the first LA engine, introduced in 1964 and offered through 1969, rated at 180 BHp. It had a 3.625 in (92 mm) bore and 3.31 in (84 mm) stroke. It had a mechanical solid lifter valvetrain until 1968 when hydraulic lifters were introduced; hydraulic lifters generally make for a quieter valvetrain. The reciprocating assembly included a cast or forged steel crankshaft, cast or forged steel connecting rods and cast aluminum pistons. The valvetrain consisted of a cast nodular iron camshaft, solid or hydraulic lifters, solid pushrods and shaft-mounted, stamped steel rocker arms. These actuated the overhead steel intake and exhaust valves. The cylinder heads featured wedge-shaped combustion chambers with a single intake and a single exhaust valve for each cylinder. Spark plugs were located in the side of the cylinder head, between the exhaust ports.
A special version was also available in 1966 only - it used a 0.500-inch (12.7 mm) lift solid-lifter camshaft, fabricated-steel-tube exhaust, and a Holley 4-barrel carburetor, producing 275 horsepower (1 hp/cu in). It was available in the Dodge Dart only, and the car so equipped was called the "D-Dart". A 235 hp (175 kW) version with a less aggressive camshaft and without the tube headers was available on regular production Darts, Valiants, and Barracudas from 1965 to '67; it was standard only in the Barracuda Formula S model.
Vehicles using the 273- 1964–1968 Dodge Dart
- 1964–1968 Plymouth Barracuda
- Plymouth Belvedere
- Dodge Coronet
- Plymouth Satellite
- 1964–1968 Plymouth Valiant
- 1966–1967 Ghia 450 SS
Read more about this topic: Chrysler LA Engine