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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. | | |||||
951C/952C | 42 | 10 | 8 | 36 | 232 | 224 | 196 | 190 | .295" | .295" | H | H | Std. GT. | ||
1074C/1075C | 42 | 10 | 8 | 36 | 232 | 224 | 198 | 192 | .315" | .315" | H | H | Std. Coltus. | ||
708C | 59 | 13 | 10 | 62 | 252 | 252 | 215 | 215 | .345" | .345" | H | H | BD.10. | ||
805C | 60 | 14 | 11 | 63 | 254 | 254 | 220 | 220 | .355" | .355" | H | H | BD.14. | ||
952 | 54 | 22 | 28 | 56 | 256 | 264 | 224 | 234 | .354" | .354" | H | H | Factory rally. | ||
935C | 64 | 28 | 30 | 62 | 272 | 272 | 230 | 230 | .352" | .352 | H | H | Rally/ race. | ||
1044 | 73 | 41 | 48 | 72 | 294 | 300 | 240 | 246 | .354" | .354" | H | H | Road race/ rally. | ||
800C | 73 | 42 | 42 | 73 | 295 | 295 | 244 | 244 | .358" | .358" | H | H | Road race only. | ||
817C | 79 | 39 | 39 | 79 | 298 | 298 | 245 | 245 | .410" | .410" | H | H | 4000-8200 rpm. | ||
793C | 75 | 35 | 39 | 71 | 290 | 290 | 258 | 258 | .405" | .405" | H | H | 4500-9000 rpm. | ||
Notes -
- Although standard springs will run up to .400", rpm over 7500 will not be maintained with safety.
- When lift over .360" is used, the lifter preload must be reset.
- Computer chips also available for some applications.