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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. | | |||||
465 | 70 | 30 | 30 | 70 | 280 | 280 | 226 | 226 | .500" | .500" | .022" | .020" | S.V.O Boss. | ||
140T | 75 | 32 | 37 | 71 | 287 | 288 | 240 | 240 | .515" | .515" | .018" | .016" | Very good single carb. | ||
883C | 66 | 30 | 30 | 66 | 276 | 276 | 240 | 240 | .580" | .580" | .022" | .020" | Fast road. | ||
764 | 83 | 35 | 44 | 68 | 298 | 292 | 256 | 251 | .622" | .614" | .024" | .020" | Fast road/ drag. | ||
392C | 76 | 44 | 47 | 73 | 300 | 300 | 254 | 254 | .584" | .584" | .022" | .020" | Fast road/ drag. | ||
285C | 82 | 49 | 55 | 76 | 311 | 311 | 252 | 252 | .570" | .570" | .022" | .020 | Fast road/ drag. | ||
389 | 76 | 31 | 33 | 76 | 287 | 289 | 272 | 264 | .588" | .570" | .028" | .026" | Drag 3500-7500 rpm. | ||
361C | 94 | 56 | 60 | 90 | 330 | 330 | 275 | 275 | .595" | .595" | .025" | .020" | Drag only. | ||
Notes -
- Care must be taken with valve springs.
- Cams must be degreed in to insure best performance.
- Fluted lifters are recommended for all solid grinds.
- Roller cams are also available.