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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. | | |||||
1021 | 252 | 263 | 198 | 218 | .405" | .405" | H | H | Series1. | ||||||
972C | 60 | 10 | 15 | 55 | 250 | 250 | 202 | 202 | .465" | .465" | H | H | Torque. | ||
753C | 68 | 20 | 28 | 60 | 268 | 268 | 224 | 224 | .525" | .525" | H | H | 2300-6500 rpm. | ||
669 | 65 | 25 | 25 | 65 | 270 | 270 | 233 | 233 | .420" | .420" | H | H | Std. Mustang. | ||
953A | 70 | 40 | 35 | 75 | 290 | 290 | 250 | 250 | .575" | .575" | H | H | Speedway. | ||
866C | 83 | 47 | 41 | 79 | 300 | 300 | 260 | 260 | .525" | .525" | H | H | Fast road. | ||
669C | 80 | 42 | 45 | 77 | 302 | 302 | 270 | 270 | .440" | .440" | H | H | Fast road. | ||
Notes -
- Series 1/ 2 or 3 engine needs to be specified.
- New profiles being developed, please enquire.
- For solid roller profiles see Chevrolet S/B.