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Ford 1974 351 163HP specs: 351 ci (5.8L) 8-cylinder, 4.002 x 3.50 in (101.7 x 88.9 mm) bore and stroke, 9.282:1 compression. Rated 163 hp, 1974.
The Ford 1974 351 163HP is oversquare — the 4.002" bore exceeds the 3.5" stroke by 14.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.5" stroke puts mean piston speed at 4,000 ft/min around 6,850 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.651 is in the range most production engines fall in. Each of the 8 cylinders displaces 43.9 ci (719 cc).
9.282:1 on iron heads is low by modern standards and generally happy on regular pump fuel.
It is one of 37 engines in the Ford 351ci family, all of them 351 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 351 ci / 5.8 L |
|---|---|
| Bore | 4.002" |
| Stroke | 3.5" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 9.282:1 |
| Rod length | 5.78" |
| Rod ratio | 1.651 |
| Bore/stroke ratio | 1.143 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 163 hp |
| Years | 1974 |
| Bore/stroke character | 1.143 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,500 ft/min — conservative for a street engine |
| Rod ratio | 1.651 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 43.9 ci |
| Static compression | 9.282:1 — low by modern standards, generally happy on regular pump fuel |
| Intake valve diameter | 2.05" |
|---|---|
| Exhaust valve diameter | 1.66" |
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