Chevrolet 302ci 11:1 Specs
Chevrolet Chevrolet 302ci · 4.002" × 3.005" · 11:1 engine specs: 302 ci (4.9L), 8-cylinder, 4.002" bore x 3.005" stroke, 11:1 compression.
Dimensions
| Displacement | 302 ci / 4.9 L |
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| Bore | 4.002" |
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| Stroke | 3.005" |
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| Cylinders | 8 |
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| Compression ratio | 11:1 |
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| Rod length | 5.7" |
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| Rod ratio | 1.897 |
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| Bore/stroke ratio | 1.332 |
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| Piston deck clearance | 0.002" |
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Construction
| Induction | 1-4 |
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| Advertised HP | 290 hp |
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| Years | 1967–1969 |
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What these numbers mean
| Bore/stroke character | 1.332 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,005 ft/min — conservative for a street engine |
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| Rod ratio | 1.897 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 37.8 ci |
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| Static compression | 11:1 — high enough that pump premium or better is normally required |
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Cylinder head
| Intake valve diameter | 2.023" |
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| Exhaust valve diameter | 1.605" |
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| Chamber volume | 61.2 cc |
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| Rocker ratio | 1.5:1 |
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| Lifter type | mechanical |
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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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| 1967 | 290 hp | — |
| 1968 | 290 hp | — |
| 1969 | 290 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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