Plymouth EGM Specs
Plymouth EGM engine specs: 230 ci (3.8L), 6-cylinder, 3.7795" bore x 3.4252" stroke, 9:1 compression.
Dimensions
| Displacement | 230 ci / 3.8 L |
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| Bore | 3.7795" |
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| Stroke | 3.4252" |
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| Cylinders | 6 |
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| Compression ratio | 9:1 |
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| Bore/stroke ratio | 1.103 |
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Construction
| Block material | cast iron |
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| Head material | aluminum |
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| Valvetrain | OHV |
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| Fuel type | gas |
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| Advertised HP | 162 hp |
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What these numbers mean
| Bore/stroke character | 1.103 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,425 ft/min — conservative for a street engine |
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| Displacement per cylinder | 38.3 ci |
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| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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