Ford Boss 351 engine
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| Ford Boss 351 V8 | |
|---|---|
| Manufacturer | Ford Motor Company |
| Production | 1970– |
| Predecessor | Ford Boss 302 V8 |
| Class | 90° OHV V8 |
| Engine | 351 in³ (5.8 L) |
| Related | Ford 335 "Cleveland" V8 |
| Similar | Chevrolet Small-Block V8 Chrysler Hemi V8 |
The Ford Boss 351 is a modified 351 in³ (5.8 L) 335 "Cleveland" V8. Created in 1970, it uses the basic four-bolt Cleveland block and crankshaft but both are constructed from high-strength nodular iron. The cylinder head is modified for better airflow and solid lifters. Aluminum valve covers added to the look. The forged connecting rods were shot-peened and magnafluxed for strength, and forged domed pistons gave an 11.3:1 nominal (11.1:1 advertised) compression ratio.
- Configuration: 90° V8, overhead valve
- Engine displacement: 351 in³ (5.8 L)
- Bore and stroke: 4.00 in (101.6 mm) by 3.5 in (88.9 mm)
- Bore/stroke ratio: 1.14:1
- Bore spacing: 4.38 in (111.3 mm)
- Connecting rod length: 5.78 in (146.8 mm)
- Maximum power: 330 hp (246 kW) at 5,400 rpm
- Maximum torque: 370 ft·lbf (501 N·m) at 4,000 rpm
- Compression ratio: 11.3:1 (64.6-67.6 cc quench type chambers)
- Piston compression height: 1.631 in (41.4 mm)
- Carburetor: Autolite 4V, spread bore, 750 ft³/min
- Fuel: Premium leaded
- Valve train: Mechanical
- Valve lash cold: .022 in (0.6 mm) intake and exhaust, .025 hot
