See other engines in this family
Ford Predator specs: 315.3 ci (5.2L) 8-cylinder, 3.701 x 3.661 in (94 x 93 mm) bore and stroke, 9.5:1 compression. Rated 760 hp. Rod ratio and piston speed.
The Ford Predator is close to square: 3.7008" bore against 3.6614" stroke, within 1.1%, which splits the difference between a high-revving layout and a torque layout. The 3.6614" stroke puts mean piston speed at 4,000 ft/min around 6,550 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 39.4 ci (646 cc).
9.5:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 4 engines in the Coyote family, the largest at 315.3 ci. Factory fitments include the Ford Mustang Shelby GT500.
| Displacement | 315.3 ci / 5.2 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.6614" |
| Cylinders | 8 |
| Compression ratio | 9.5:1 |
| Bore/stroke ratio | 1.011 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 760 hp |
| Bore/stroke character | 1.011 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,661 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 39.4 ci |
| Static compression | 9.5:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.