Chevrolet 327ci 10:1 Specs
Chevrolet Chevrolet 327ci · 4.001" × 3.25" · 10:1 engine specs: 327 ci (5.4L), 8-cylinder, 4.001" bore x 3.25" stroke, 10:1 compression.
Dimensions
| Displacement | 327 ci / 5.4 L |
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| Bore | 4.001" |
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| Stroke | 3.25" |
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| Cylinders | 8 |
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| Compression ratio | 10:1 |
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| Rod length | 5.7" |
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| Rod ratio | 1.754 |
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| Bore/stroke ratio | 1.231 |
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| Piston deck clearance | 0.002" |
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Construction
| Induction | 1-4 |
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| Advertised HP | 275–300 hp |
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| Years | 1967–1968 |
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What these numbers mean
| Bore/stroke character | 1.231 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,250 ft/min — conservative for a street engine |
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| Rod ratio | 1.754 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 40.9 ci |
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| Static compression | 10:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.945" |
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| Exhaust valve diameter | 1.505" |
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| Chamber volume | 57.5 cc |
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| Rocker ratio | 1.5:1 |
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| Lifter type | hydraulic |
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Variants sharing these dimensions (4)
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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| 1967 | 275 hp | — |
| 1967 | 300 hp | — |
| 1968 | 275 hp | — |
| 1968 | 300 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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