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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. | | |||||
972 | 79 | 40 | 38 | 71 | 299 | 289 | 232 | 222 | .500" | .475" | .018" | .018" | Mild street 2500-6500 rpm. | ||
SESCO | 71 | 34 | 34 | 71 | 285 | 285 | 244 | 244 | .495" | .495' | .016" | .014" | Speedway single carb. | ||
731 | 79 | 41 | 44 | 66 | 300 | 290 | 264 | 246 | .482" | .475" | .018" | .018" | Fast road. | ||
1005C | 76 | 44 | 44 | 76 | 300 | 300 | 260 | 260 | .618" | .618" | .022" | .022" | Fast road. | ||
900C | 79 | 51 | 51 | 79 | 310 | 310 | 274 | 274 | .550" | .550" | .030" | .028" | Road race 4500-8000 rpm. | ||
1008C | 81 | 45 | 45 | 81 | 306 | 306 | 288 | 288 | .670" | .670" | .026" | .026" | Road race 5000-9000 rpm. | ||
Notes -
- Bronze Gears must be used on steel camshafts.
- These profiles chosen because of lower lift.
- For more profiles see Chevrolet s/b roller.