Chrysler A engine
| Chrysler A engine | |
|---|---|
 |
|
| Overview | |
| Manufacturer | Chrysler |
| Also called | Plymouth A engine |
| Production | 1956-1961 |
| Combustion chamber | |
| Configuration | V8 |
| Displacement |
|
| Cylinder bore |
|
| Piston stroke |
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| Cylinder block alloy | Cast iron |
| Cylinder head alloy | Cast iron |
| Valvetrain | OHV |
| Combustion | |
| Fuel system | Carburetor |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | water-cooled |
| Chronology | |
| Predecessor | Polyshperic engines |
| Successor | Chrysler LA engine |
The Chrysler A engine is a small-block V8 automobile engine from Chrysler Corporation. It was produced from 1956 until 1967, when it was replaced by the wedge-head LA engine. The A engine's combustion chambers are polyspherical, and it is not related to Chrysler's Hemi engines of the same era.
The A engine was first released in 1956, and was used exclusively in Plymouths until 1958. The cylinder bore center distance is 4.46 in (113.3 mm), larger than the earlier Dodge-based poly engines. The A engine formed the conceptual design basis of its successor, the LA engine.
The 277 was the first A-block engine, produced for 1956 and sharing almost nothing but the basic concepts with other engines built by Chrysler. Bore is 3.75 in (95.3 mm) and stroke is 3.13 in (79.5 mm) for a piston displacement of 276.1 cu in (4.5 L). It was replaced by the 301 in 1957, except for in low-priced Plaza models where it continued to be used during the 1957 model year.
The Plymouth 301 replaced the 278 in 1957. Its piston displacement is 299.6 cu in (4.9 L), owing to its 3.91 in (99.3 mm) bore. These dimensions are entirely different from the 1955 Chrysler 301.
The 1956 Plymouth 303 displaces 302.5 cu in (5.0 L) and uses the same connecting rods as the 277; the bore is 3.81 in (96.8 mm) and the stroke is 3.31 in (84.1 mm).
This engine was used in the following vehicles:
A 312.5 cu in (5.1 L) version of the A engine called the 313 was produced from 1957 to 1967 primarily for Canadian and export markets. This engine has a bore of 3.88 in (99 mm) and the common 3.31 in (84.1 mm) stroke, and was used in the following vehicles, amongst others:
The 318 is the most common version of the A engine, produced from 1957 through 1967 when it was replaced in all markets by the LA 318. Only Plymouth used this 318 in 1957 and 1958, but it was shared with the other Chrysler divisions from 1959 on. It displaces 317.9 cu in (5210 cc) and has a 3.91 in (99.3 mm) bore and the 3.31 in (84.1 mm) stroke.
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