Chevrolet 454ci 9.301:1 Specs
Chevrolet Chevrolet 454ci · 4.251" × 4.000" · 9.301:1 engine specs: 454 ci (7.4L), 8-cylinder, 4.251" bore x 4" stroke, 9.301:1 compression.
Dimensions
| Displacement | 454 ci / 7.4 L |
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| Bore | 4.251" |
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| Stroke | 4" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 9.301:1 |
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| Rod length | 6.136" |
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| Rod ratio | 1.534 |
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| Bore/stroke ratio | 1.063 |
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| Piston deck clearance | 0.008" |
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Construction
| Block material | cast iron |
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| Head material | cast iron |
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| Valvetrain | OHV |
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| Fuel type | gas |
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| Advertised HP | 230–365 hp |
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| Years | 1971–1972 |
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What these numbers mean
| Bore/stroke character | 1.063 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 4,000 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.534 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
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| Displacement per cylinder | 56.8 ci |
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| Static compression | 9.301:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Intake valve diameter | 2.07" |
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| Exhaust valve diameter | 1.725" |
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| Chamber volume | 96.4 cc |
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| Rocker ratio | 1.7:1 |
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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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| 1971 | 365 hp | — |
| 1972 | 230 hp | — |
| 1972 | 270 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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