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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. | | |||||
| 560 | 68 | 20 | 28 | 60 | 268 | 268 | 220 | 220 | 0.407" | 0.407" | 0.012" | 0.010" | 1st improvement | ||
| 524C | 65 | 25 | 25 | 65 | 270 | 270 | 236 | 236 | 0.427" | 0.427" | 0.016" | 0.014" | Mild Road | ||
| 663A | 70 | 22 | 26 | 66 | 272 | 272 | 244 | 244 | 0.420" | 0.420" | 0.016" | 0.014" | Mild Road | ||
| 490A | 66 | 30 | 32 | 63 | 275 | 275 | 243 | 243 | 0.440" | 0.440" | 0.014" | 0.012" | fast Road Modified Carbs | ||
| 788C | 70 | 27 | 31 | 67 | 278 | 278 | 236 | 236 | 0.460" | 0.460" | 0.014" | 0.012" | |||
| 483C | 81 | 49 | 49 | 81 | 310 | 310 | 262 | 262 | 0.480" | 0.480" | 0.014" | 0.012" | |||
| 898B | 74 | 50 | 50 | 74 | 304 | 304 | 272 | 272 | 0.447" | 0.477" | 0.012" | 0.010" | |||
| 613C | 89 | 61 | 61 | 89 | 330 | 330 | 280 | 280 | 0.528" | 0.528" | 0.012" | 0.010" | Full race to suit Formula 2 only | ||
| S/M CC | 89 | 57 | 61 | 85 | 326 | 326 | 282 | 282 | 0.570" | 0.570" | 0.012" | 0.010" | Full Race to suit Formula 2 only | ||
Notes -
* The above profiles are only the selected few from our range, please enquire if you require a different selection.
* Most of the profiles require the cams to be hardfaced, or a new camshaft to be supplied.
