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Studebaker 352ci (1956) specs: 352 ci 8-cylinder, 4.00 x 3.50 in (101.6 x 88.9 mm) bore and stroke, 9.5:1 compression. Rated 275 hp, 1956.
The Studebaker 352ci (1956) is oversquare — the 4" 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. Each of the 8 cylinders displaces 44.0 ci (721 cc).
9.5:1 is in the range that usually runs on pump premium.
| Displacement | 352 ci |
|---|---|
| Bore | 4" |
| Stroke | 3.5" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 9.5:1 * |
| Bore/stroke ratio | 1.143 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 275 hp |
| Years | 1956 |
| 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 |
| Displacement per cylinder | 44.0 ci |
| Static compression | 9.5:1 — in the range that usually runs on pump premium |
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1 factory vehicle, 1956. Each year opens that model's engine table.