Pontiac straight-8 engine
| Pontiac straight-8 engine | |
|---|---|
| Overview | |
| Manufacturer | Pontiac (General Motors) |
| Also called | Silver Streak |
| Production | 1933–1954 |
| Layout | |
| Configuration | Naturally aspirated Straight-8 cylinder |
| Displacement |
|
| Cylinder block material | Cast iron |
| Cylinder head material | Cast iron |
| Valvetrain | Flathead |
| Compression ratio | 5.7:1, 6.8:1, 7.7:1 |
| Combustion | |
| Fuel system | Carter Carburetor |
| Fuel type | Gasoline |
| Oil system | Full pressure |
| Cooling system | Water-cooled |
| Output | |
| Power output | 77–127 bhp (57–95 kW) |
| Torque output | 153–234 lb⋅ft (207–317 N⋅m) |
| Chronology | |
| Predecessor | 251 cu in (4.1 L) flathead I8 |
| Successor | 287 cu in (4.7 L) OHV V8 |
The Pontiac straight-8 engine is an inline eight-cylinder automobile engine produced by Pontiac from 1933 to 1954. Introduced in the fall of 1932 for the 1933 models, it was Pontiac's most powerful engine at the time and the least expensive eight-cylinder engine built by an American automotive manufacturer. During its 21-year run displacement of the "eight" increased twice as platforms grew. It was superseded by Pontiac's new V8, the 287, in 1955. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation.