Pontiac 346ci 10.2:1 Specs
Pontiac Pontiac 346ci · 3.898" × 3.622" · 10.2:1 engine specs: 346 ci (5.7L), 8-cylinder, 3.898" bore x 3.622" stroke, 10.2:1 compression.
Dimensions
| Displacement | 346 ci / 5.7 L |
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| Bore | 3.898" |
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| Stroke | 3.622" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 10.2:1 |
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| Rod length | 6.1" |
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| Rod ratio | 1.684 |
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| Bore/stroke ratio | 1.076 |
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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 | 305–325 hp |
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| Years | 1998–2002 |
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What these numbers mean
| Bore/stroke character | 1.076 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.684 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 43.3 ci |
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| Static compression | 10.2:1 — in the range that usually runs on pump premium |
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Variants sharing these dimensions (10)
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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| 1998 | 305 hp | — |
| 1998 | 320 hp | — |
| 1999 | 305 hp | — |
| 1999 | 320 hp | — |
| 2000 | 305 hp | — |
| 2000 | 320 hp | — |
| 2001 | 310 hp | — |
| 2001 | 325 hp | — |
| 2002 | 310 hp | — |
| 2002 | 325 hp | — |
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← All Pontiac 346ci engines