GMC 302 Specs
GMC 302 engine specs: 302 ci (4.9L), 8-cylinder, 4" bore x 3" stroke, 11:1 compression.
Dimensions
| Displacement | 302 ci / 4.9 L |
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| Bore | 4" |
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| Stroke | 3" |
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| Cylinders | 8 |
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| Compression ratio | 11:1 |
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| Bore/stroke ratio | 1.333 |
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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 | 290 hp |
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What these numbers mean
| Bore/stroke character | 1.333 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,000 ft/min — conservative for a street engine |
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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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Vehicles (1)
- GMC Sprint (Trans Am racing homologation)
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