Pontiac 350ci 8.301:1 Specs
Pontiac Pontiac 350ci · 3.877" × 3.754" · 8.301:1 engine specs: 350 ci (5.7L), 8-cylinder, 3.877" bore x 3.754" stroke, 8.301:1 compression.
Dimensions
| Displacement | 350 ci / 5.7 L |
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| Bore | 3.877" |
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| Stroke | 3.754" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 8.301:1 |
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| Rod length | 6.625" |
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| Rod ratio | 1.765 |
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| Bore/stroke ratio | 1.033 |
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| Piston deck clearance | 0" |
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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 | 160–165 hp |
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| Years | 1976 |
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What these numbers mean
| Bore/stroke character | 1.033 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 3,754 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.765 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 43.8 ci |
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| Static compression | 8.301:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Intake valve diameter | 2.113" |
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| Exhaust valve diameter | 1.663" |
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| Chamber volume | 73 cc |
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| Rocker ratio | 1.5:1 |
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| Lifter type | hydraulic |
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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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| 1976 | 160 hp | — |
| 1976 | 165 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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