Pontiac 326 Specs
Pontiac 326 engine specs: 326 ci (5.3L), 8-cylinder, 3.811" bore x 3.563" stroke, 8.6:1 compression.
Dimensions
| Displacement | 326 ci / 5.3 L |
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| Bore | 3.811" |
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| Stroke | 3.563" |
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| Cylinders | 8 |
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| Compression ratio | 8.6:1 |
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| Bore/stroke ratio | 1.07 |
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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 | 250 hp |
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What these numbers mean
| Bore/stroke character | 1.070 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,563 ft/min — in the range typical of performance street engines |
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| Displacement per cylinder | 40.8 ci |
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| Static compression | 8.6:1 — low by modern standards, generally happy on regular pump fuel |
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Vehicles (7)
- Pontiac Tempest
- Pontiac LeMans
- Pontiac GTO
- Pontiac Firebird
- LeMans
- Firebird
- Tempest
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