Ford 122ci 9.76:1 Specs
Ford Ford 122ci · 3.578" × 3.030" · 9.76:1 engine specs: 122 ci (2L), 4-cylinder, 3.578" bore x 3.03" stroke, 9.76:1 compression.
Dimensions
| Displacement | 122 ci / 2 L |
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| Bore | 3.578" |
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| Stroke | 3.03" |
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| Cylinders | 4 |
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| Configuration | I4 |
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| Compression ratio | 9.76:1 |
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| Rod length | 5" |
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| Rod ratio | 1.65 |
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| Bore/stroke ratio | 1.181 |
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| Piston deck clearance | 0.007" |
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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 | 80–85 hp |
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| Years | 1973–1974 |
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What these numbers mean
| Bore/stroke character | 1.181 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,030 ft/min — conservative for a street engine |
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| Rod ratio | 1.65 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 30.5 ci |
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| Static compression | 9.76:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.661" |
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| Exhaust valve diameter | 1.425" |
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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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| 1973 | 85 hp | — |
| 1974 | 80 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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