Chevrolet Chevr 1973 400 150HP Specs
Chevrolet Chevr 1973 400 150HP engine specs: 400 ci (6.6L), 8-cylinder, 4.125" bore x 3.75" stroke, 9.031:1 compression.
Dimensions
| Displacement | 400 ci / 6.6 L |
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| Bore | 4.125" |
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| Stroke | 3.75" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 9.031:1 |
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| Rod length | 5.57" |
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| Rod ratio | 1.485 |
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| Bore/stroke ratio | 1.1 |
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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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| Years | 1973 |
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What these numbers mean
| Bore/stroke character | 1.100 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,750 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.485 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
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| Displacement per cylinder | 50.0 ci |
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| Static compression | 9.031:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Intake valve diameter | 1.945" |
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| Exhaust valve diameter | 1.505" |
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