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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. | | |||||
52 | 10 | 17 | 35 | 242 | 232 | .330" | .345" | .010" | .008" | Std. E15 turbo. | |||||
437 | 58 | 2 | 10 | 50 | 240 | 240 | .345" | .360" | .010" | .008"' | Std. non turbo. | ||||
452B | 52 | 8 | 10 | 50 | 240 | 240 | .412" | .412" | .010"' | .008" | 1st Imp. (non turbo). | ||||
636 | 56 | 12 | 16 | 52 | 248 | 248 | .417" | .417" | .010" | .008" | 2nd Imp. (non turbo). | ||||
1366 | 72 | 32 | 32 | 74 | 284 | 286 | .420" | .420" | .010" | .008" | Fast road (grind on). | ||||
1037C | 84 | 48 | 50 | 82 | 312 | 312 | .456" | .456" | .010" | .008" | Hardface only (@ .020'). | ||||
Notes -
- Available on regring cams only.
- Valve springs required for over .440" lift.