Ford 429ci 9.3:1 Specs
Ford Ford 429ci · 4.362" × 3.590" · 9.3:1 engine specs: 429 ci (7L), 8-cylinder, 4.362" bore x 3.59" stroke, 9.3:1 compression.
Dimensions
| Displacement | 429 ci / 7 L |
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| Bore | 4.362" |
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| Stroke | 3.59" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 9.3:1 |
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| Rod length | 6.605" |
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| Rod ratio | 1.84 |
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| Bore/stroke ratio | 1.215 |
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| Piston deck clearance | 0.018" |
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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 | 197–208 hp |
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| Years | 1973 |
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What these numbers mean
| Bore/stroke character | 1.215 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,590 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.84 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 53.6 ci |
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| Static compression | 9.3:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Intake valve diameter | 2.09" |
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| Exhaust valve diameter | 1.661" |
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| Chamber volume | 71.5 cc |
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| Rocker ratio | 1.75:1 |
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| Lifter type | hydraulic |
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Variants sharing these dimensions (5)
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 | 197 hp | — |
| 1973 | 198 hp | — |
| 1973 | 201 hp | — |
| 1973 | 202 hp | — |
| 1973 | 208 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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