Chevrolet Duramax 16:1 Specs
Chevrolet Duramax · 4.055" × 3.898" · 16:1 engine specs: 403 ci (6.6L), 8-cylinder, 4.0551" bore x 3.8976" stroke, 16:1 compression.
Dimensions
| Displacement | 403 ci / 6.6 L |
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| Bore | 4.0551" |
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| Stroke | 3.8976" |
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| Cylinders | 8 |
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| Compression ratio | 16:1 |
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| Bore/stroke ratio | 1.04 |
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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 | diesel |
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| Advertised HP | 397–445 hp |
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What these numbers mean
| Bore/stroke character | 1.040 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 3,898 ft/min — in the range typical of performance street engines |
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| Displacement per cylinder | 50.4 ci |
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| Static compression | 16:1 — high enough that pump premium or better is normally required |
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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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| — | 397 hp | LML |
| — | 445 hp | L5P |
Vehicles (4)
- Chevrolet Silverado 2500HD/3500HD
- GMC Sierra 2500HD/3500HD
- Chevrolet Express Van
- GMC Savana Van
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← All Duramax engines