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Profile Number | Advertised Timings | DURATION | VALVE LIFT | TAPPET CLEARANCE | REMARKS | ||||||||||
Ex Op. B.B.D.C. | Ex Cl A.T.D.C | In Op. B.T.D.C. | In Cl A.B.D.C | Advertised | @ 0.050" | Gross. | @ T.D.C. | Ex. | In. | | |||||
317 | 70 | 14 | 20 | 64 | 264 | 264 | 210 | 210 | .390" | .390" | .018" | .010 | Std. | ||
113 | 65 | 25 | 25 | 65 | 270 | 270 | 207 | 207 | .398" | .398" | .027" | .033" | .014" | .014" | Mild. |
104 | 65 | 25 | 25 | 65 | 270 | 270 | 215 | 215 | .423" | .423" | .038" | .048" | .014" | .014" | Road 2500-6500 rpm. |
240 | 75 | 25 | 25 | 75 | 280 | 280 | 218 | 218 | .423" | .423" | .040" | .053" | .016" | .016" | Std. |
154 | 71 | 25 | 31 | 70 | 276 | 281 | 216 | 227 | .398" | .398" | .033" | .054" | .014" | .014" | Mild 2300-6500 rpm. |
293C | 72 | 30 | 33 | 69 | 282 | 282 | 232 | 232 | .435" | .435" | .059" | .087" | .016" | .016" | Rally. |
402 | 77 | 34 | 37 | 74 | 291 | 291 | 241 | 241 | .400" | .400" | .061" | .095" | .014" | .012" | Fast road/rally 3200 rpm^. |
121 | 75 | 41 | 40 | 77 | 296 | 297 | 240 | 240 | .410" | .410" | .076" | .113" | .011" | .011" | Fast road 3800-6500 rpm. |
157A | 79 | 50 | 50 | 79 | 309 | 309 | 258 | 258 | .475" | .475" | .120" | .130" | .011" | .011" | Road race 4750-8000 rpm. |
446C | 91 | 43 | 50 | 87 | 314 | 314 | 264 | 264 | .480" | .480" | .014" | .014" | Ford wks. | ||
185A | 86 | 54 | 54 | 86 | 300 | 320 | 270 | 270 | .410" | .410" | .014" | .014" | Race only. | ||
Notes -
- Available on new castings only.
- Regrinds available on clients camshaft.
- Low springs pressure is recommended.