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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. | | |||||
300AT | 65 | 15 | 20 | 60 | 260 | 260 | 203 | 203 | .412 | .412 | .020" | .027" | H | H | Torque |
422A | 64 | 20 | 24 | 60 | 264 | 264 | 208 | 208 | .414" | .414" | .026" | .044" | H | H | Very mild. |
603 | 67 | 17 | 25 | 60 | 264 | 264 | 214 | 214 | .429" | .429" | H | H | Mild 1500-4500 rpm. | ||
310 | 68 | 20 | 28 | 60 | 268 | 268 | 214 | 214 | .445" | .445" | .054" | .029" | H | H | High lift short duration |
594 | 76 | 28 | 36 | 68 | 282 | 282 | 224 | 225 | .460" | .460" | .040" | .080" | H | H | |
592 | 79 | 25 | 31 | 73 | 284 | 284 | 222 | 222 | .447" | .447" | H | H | Factory cam #386151. | ||
682 | 78 | 33 | 30 | 81 | 291 | 291 | 230 | 230 | .450" | .450" | H | H | |||
727 | 81 | 45 | 45 | 81 | 306 | 306 | 235 | 235 | .462" | .462" | H | H | Fast road 3800-6500 rpm. | ||
512B | 66 | 36 | 30 | 75 | 282 | 285 | 233 | 233 | .480" | .480" | H | H | |||
376 | 88 | 40 | 48 | 80 | 308 | 308 | 242 | 242 | .456" | .456" | .059" | .053" | H | H | Road/drag 4000-7200 rpm. |
414C | 82 | 48 | 48 | 82 | 310 | 310 | 252 | 252 | .484" | .484" | .092" | .117" | H | H | Drag 4200-8000 rpm. |
926 | 73 | 37 | 31 | 67 | 290 | 278 | 234 | 222 | .490" | .465" | H | H | |||
Notes -
- Valve springs should be changed on cams with lift over 0.450".
- Fluted lifters are recommended for larger profile cams.