Oldsmobile 330ci 10.25:1 Specs
Oldsmobile Oldsmobile 330ci · 3.938" × 3.385" · 10.25:1 engine specs: 330 ci (5.4L), 8-cylinder, 3.938" bore x 3.385" stroke, 10.25:1 compression.
Dimensions
| Displacement | 330 ci / 5.4 L |
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| Bore | 3.938" |
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| Stroke | 3.385" |
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| Cylinders | 8 |
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| Compression ratio | 10.25:1 |
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| Rod length | 6.002" |
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| Rod ratio | 1.773 |
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| Bore/stroke ratio | 1.163 |
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Construction
| Induction | 1-2 |
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| Advertised HP | 245–310 hp |
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| Years | 1964 |
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What these numbers mean
| Bore/stroke character | 1.163 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,385 ft/min — conservative for a street engine |
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| Rod ratio | 1.773 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 41.3 ci |
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| Static compression | 10.25:1 — in the range that usually runs on pump premium |
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Cylinder head
| Chamber volume | 60.19 cc |
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| Rocker ratio | 1.6:1 |
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| Lifter type | hydraulic |
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Variants sharing these dimensions (3)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
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| 1964 | 245 hp | — |
| 1964 | 290 hp | — |
| 1964 | 310 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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