Subaru ER27 Specs
Subaru ER27 engine specs: 163.1 ci (2.672L), 6-cylinder, 3.622" bore x 2.6378" stroke, 9.5:1 compression.
Dimensions
| Displacement | 163.1 ci / 2.672 L |
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| Bore | 3.622" |
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| Stroke | 2.6378" |
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| Cylinders | 6 |
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| Compression ratio | 9.5:1 |
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| Bore/stroke ratio | 1.373 |
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Construction
| Block material | aluminum |
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| Head material | aluminum |
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| Valvetrain | SOHC |
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| Fuel type | gas |
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| Advertised HP | 145 hp |
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What these numbers mean
| Bore/stroke character | 1.373 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 2,638 ft/min — conservative for a street engine |
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| Displacement per cylinder | 27.2 ci |
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| Static compression | 9.5:1 — in the range that usually runs on pump premium |
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