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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 | .470" | .470" | H | H | |||
| 422A | 60 | 24 | 24 | 60 | 264 | 264 | 208 | 208 | .470" | .470" | H | H | Economy 1500-4800 rpm. | ||
| 310 | 68 | 20 | 24 | 64 | 268 | 268 | 215 | 215 | .510" | .510" | H | H | Economy & more mid range power. | ||
| 1102 | 63 | 27 | 27 | 63 | 270 | 270 | 221 | 221 | .536" | .536" | H | H | |||
| 599 | 86 | 38 | 32 | 80 | 304 | 292 | 228 | 214 | .506" | .510" | H | H | 2000-6000 rpm. | ||
| 972 | 82 | 37 | 33 | 76 | 288 | 289 | 232 | 222 | .566" | .540" | H | H | 112 Lobe C/L. | ||
| 682 | 78 | 33 | 30 | 81 | 291 | 291 | 230 | 230 | .510" | .510" | H | H | 2500-6500 rpm. | ||
| 1146 | 92 | 52 | 47 | 87 | 324 | 254 | 254 | 244 | .595" | .603" | H | H | |||
| 911 | 86 | 38 | 33 | 81 | 304 | 294 | 258 | 248 | .612" | .588" | .016" | .014" | 3200-7200 rpm. | ||
| 764 | 86 | 38 | 46 | 70 | 304 | 296 | 262 | 254 | .612" | .612" | .026" | .022" | Fast street/Drag. | ||
Notes -
- A very large range of profiles available for the B/B Chevrolet, please enqiure if profile required is not listed.
- Camshaft profiles may require retarding in engine to achieve best results.
- Roller camsaft also available.
- Valve springs required over 0.530" lift.