Pontiac 97ci 9.64:1 Specs
Pontiac Pontiac 97ci · 3.228" × 2.98" · 9.64:1 engine specs: 97 ci (1.6L), 4-cylinder, 3.228" bore x 2.98" stroke, 9.64:1 compression.
Dimensions
| Displacement | 97 ci / 1.6 L |
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| Bore | 3.228" |
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| Stroke | 2.98" |
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| Cylinders | 4 |
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| Compression ratio | 9.64:1 |
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| Rod length | 4.8" |
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| Rod ratio | 1.611 |
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| Bore/stroke ratio | 1.083 |
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| Piston deck clearance | 0.005" |
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Construction
| Induction | 1-2 |
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| Advertised HP | 62–65 hp |
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| Years | 1982–1983 |
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What these numbers mean
| Bore/stroke character | 1.083 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 2,980 ft/min — conservative for a street engine |
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| Rod ratio | 1.611 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 24.3 ci |
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| Static compression | 9.64:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.54" |
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| Exhaust valve diameter | 1.26" |
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| Chamber volume | 41 cc |
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| Rocker ratio | 1.6:1 |
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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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| 1982 | 62 hp | — |
| 1983 | 65 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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