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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.