Chrysler Chrys 1988 318 140HP Specs
Chrysler Chrys 1988 318 140HP engine specs: 318 ci (5.2L), 8-cylinder, 3.91" bore x 3.313" stroke, 9.801:1 compression.
Dimensions
| Displacement | 318 ci / 5.2 L |
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| Bore | 3.91" |
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| Stroke | 3.313" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 9.801:1 |
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| Rod length | 6.123" |
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| Rod ratio | 1.848 |
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| Bore/stroke ratio | 1.18 |
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| Piston deck clearance | 0.047" |
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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 | 140 hp |
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| Years | 1988 |
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What these numbers mean
| Bore/stroke character | 1.180 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,313 ft/min — conservative for a street engine |
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| Rod ratio | 1.848 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 39.8 ci |
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| Static compression | 9.801:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.78" |
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| Exhaust valve diameter | 1.5" |
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Similar engines
Source: NHRA blueprints — nhra.net blueprints
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