Chevrolet LS 9.1:1 Specs
Chevrolet LS · 3.780" × 3.268" · 9.1:1 engine specs: 293 ci (4.8L), 8-cylinder, 3.7799" bore x 3.2677" stroke, 9.1:1 compression.
Dimensions
| Displacement | 293 ci / 4.8 L |
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| Bore | 3.7799" |
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| Stroke | 3.2677" |
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| Cylinders | 8 |
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| Compression ratio | 9.1:1 |
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| Bore/stroke ratio | 1.157 |
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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 | 295–302 hp |
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What these numbers mean
| Bore/stroke character | 1.157 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,268 ft/min — conservative for a street engine |
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| Displacement per cylinder | 36.6 ci |
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| Static compression | 9.1:1 — low by modern standards, generally happy on regular pump fuel |
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Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
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| — | 295 hp | LY2 |
| — | 302 hp | L20 |
Vehicles (4)
- Chevrolet Silverado 1500
- GMC Sierra 1500
- Chevrolet Express Van
- GMC Savana Van
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