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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. | | |||||
827 | 65 | 11 | 17 | 63 | 256 | 260 | .480" | .460" | H | H | Std. E.A. | ||||
1160 | 65 | 15 | 17 | 63 | 260 | 260 | .474" | .454" | H | H | XR 6. | ||||
826 | 70 | 16 | 23 | 68 | 266 | 267 | .480" | .460" | H | H | |||||
826A | 60 | 26 | 28 | 63 | 266 | 267 | .480" | .480" | H | H | Moved lobe centre lines. | ||||
1337C | 70 | 30 | 34 | 66 | 280 | 280 | .530" | .530" | H | H | Speedway (valve springs required). | ||||
596C | 73 | 33 | 37 | 69 | 286 | 286 | .572" | .572" | H | H | Can be used as solid. | ||||
1189C | 76 | 36 | 38 | 74 | 292 | 292 | .540" | .540" | H | H | |||||
Notes -
- New profiles are constantly being developed
- Shims are available for the rockers.
- If required, machine cam caps for correct rocker geometry.
- Care must be taken because of the 2 to 1 rocker ratio.