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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. | | |||||
423C | 56 | 12 | 20 | 48 | 248 | 248 | 0.400" | 0.400" | 0.014" | 0.008" | Standard | ||||
469 | 59 | 15 | 23 | 51 | 254 | 254 | 0.450" | 0.460" | 0.014" | 0.008" | Torque suit 4WD | ||||
469X | 59 | 15 | 18 | 56 | 254 | 254 | 0.450" | 0.460" | 0.014" | 0.088" | Mild Road | ||||
469/490B | 59 | 15 | 30 | 72 | 254 | 282 | 0.440" | 0.410" | 0.014" | 0.008" | |||||
490B | 67 | 31 | 30 | 72 | 278 | 282 | 0.410" | 0.410" | 0.014" | 0.008" | Ground On | ||||
490B | 74 | 34 | 36 | 72 | 288 | 288 | 0.425" | 0.425" | 0.014" | 0.008" | Hardfaced | ||||
939C | 74 | 34 | 36 | 72 | 288 | 288 | 0.480" | 0.480" | 0.014" | 0.008" | Hardfaced Only | ||||
359B | 71 | 29 | 33 | 66 | 280 | 280 | 0.415" | 0.415" | 0.014" | 0.012" | Hardfaced Only | ||||
359A | 73 | 35 | 35 | 73 | 288 | 288 | 0.415" | 0.415" | 0.012" | 0.010" | Hardfaced Only | ||||
Notes -
* New camshafts not available at this time.
* All large improvements require hardfacing.
* Valve springs require changeing above 0.460" lift.
* Profiles also available to suit the 22R type engine.