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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. | | |||||
113 | 65 | 25 | 25 | 65 | 270 | 270 | 207 | 207 | .364" | .364" | .013" | .012" | Standard replacement. | ||
104 | 65 | 25 | 25 | 65 | 270 | 270 | 215 | 215 | .395" | .395" | .014" | .012" | Good road improvement. | ||
154 | 71 | 25 | 31 | 70 | 276 | 281 | 216 | 227 | .371" | .371" | .013" | .012" | Sporty 2200-5000 rpm. | ||
240 | 70 | 30 | 30 | 70 | 280 | 280 | 218 | 218 | .395" | .395" | .015" | .015" | 2500-6500 rpm. | ||
140T* | 75 | 32 | 37 | 71 | 287 | 288 | 240 | 240 | .418" | .418" | .015" | .015" | Fast road 2800-6000 rpm. | ||
150A* | 71 | 40 | 40 | 71 | 291 | 291 | 240 | 240 | .442" | .442" | .013" | .013" | Club sport 3500-7000 rpm. | ||
157A* | 79 | 50 | 50 | 79 | 309 | 309 | 258 | 258 | .422" | .422" | .010" | .010" | Factory B.M.C works profile. | ||
Notes -
- For more profiles to suit B series use A series or Holden solid profiles.
* Valve springs must be changed.
* Valve-piston clearance should also be checked.