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Ford 2016 429 470HP specs: 429 ci (7.0L) 8-cylinder, 4.08 x 4.10 in (103.6 x 104.1 mm) bore and stroke. Rated 470 hp, 2016. OHV. Rod ratio and piston speed.
The Ford 2016 429 470HP is close to square: 4.08" bore against 4.1" stroke, within 0.5%, which splits the difference between a high-revving layout and a torque layout. The 4.1" stroke puts mean piston speed at 4,000 ft/min around 5,850 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.549 is short — higher piston acceleration and more side-load, typical of stroker combinations and a reason to watch piston speed closely. Each of the 8 cylinders displaces 53.6 ci (879 cc).
It is one of 12 engines in the Ford 429ci family, all of them 429 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 429 ci / 7 L |
|---|---|
| Bore | 4.08" |
| Stroke | 4.1" |
| Cylinders | 8 |
| Configuration | V8 |
| Rod length | 6.35" |
| Rod ratio | 1.549 |
| Bore/stroke ratio | 0.995 |
| Piston deck clearance | 0.005" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 470 hp |
| Years | 2016 |
| Bore/stroke character | 0.995 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 4,100 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.549 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
| Displacement per cylinder | 53.6 ci |
| Intake valve diameter | 2.2" |
|---|---|
| Exhaust valve diameter | 1.6" |
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