Jeep 304 Specs
Jeep 304 engine specs: 304 ci (5L), 8-cylinder, 3.75" bore x 3.4402" stroke, 8.4:1 compression.
Dimensions
| Displacement | 304 ci / 5 L |
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| Bore | 3.75" |
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| Stroke | 3.4402" |
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| Cylinders | 8 |
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| Compression ratio | 8.4:1 |
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| Bore/stroke ratio | 1.09 |
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| Piston deck clearance | 0.022" |
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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 | 150 hp |
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What these numbers mean
| Bore/stroke character | 1.090 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,440 ft/min — conservative for a street engine |
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| Displacement per cylinder | 38.0 ci |
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| Static compression | 8.4:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Chamber volume | 50.7 cc |
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| Rocker ratio | 1.6:1 |
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| Lifter type | hydraulic |
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Vehicles (4)
- Jeep CJ
- Jeep CJ-7
- Jeep J-Series Truck
- Jeep Wagoneer (SJ)
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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