Iron Duke engine
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 to American Motors Corporation (AMC). The engine was engineered for fuel efficiency, smooth operation, and long life, not for performance. Total Duke engine production is estimated to be between 3.8 and 4.2 million units.
| Iron Duke | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Also called | Tech IV (1982-1990) |
| Production | 1977–1993 |
| Layout | |
| Configuration | Straight-four |
| Displacement | 150.8 cu in (2.5 L) |
| Cylinder bore | 4 in (101.6 mm) |
| Piston stroke | 3 in (76.2 mm) |
| Cylinder block material | Cast iron |
| Cylinder head material | Cast iron |
| Valvetrain | OHV 2 valves x cyl. |
| Compression ratio | 8.25:1 (1977–1983) 9.0:1 (1984–1993) |
| RPM range | |
| Max. engine speed | 5000 rpm |
| Combustion | |
| Fuel system | Carburetor Throttle-body fuel injection |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 85–110 hp (63–82 kW) |
| Specific power | 34.4 hp (25.7 kW)-44.5 hp (33.2 kW) per liter |
| Torque output | 123–135 lb⋅ft (167–183 N⋅m) |
| Dimensions | |
| Dry weight | 375 lb (170 kg): 3 |
| Chronology | |
| Predecessor | GM 2300 engine |
| Successor | GM 122 engine |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.