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| Profile Number |
Advertised
Timings |
DURATION |
VALVE
LIFT |
TAPPET CLEARANCE |
REMARKS |
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| 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. |
|
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| 764 | 88 | 40 | 38 | 74 | 308 | 292 | 256 | 251 | 0.594" | 0.577" | 0.022" | 0.018" | |||
| 424 | 71 | 25 | 31 | 70 | 276 | 281 | 226 | 235 | 0.465" | 0.495" | 0.014" | 0.012" | Mild 2500 - 7000 RPM | ||
| 140 | 70 | 37 | 37 | 71 | 288 | 288 | 240 | 240 | 0.492' | 0.492" | 0.018" | 0.016" | 3200 - 6000 RPM | ||
| 420 | 80 | 40 | 40 | 80 | 300 | 300 | 246 | 246 | 0.520" | 0.520' | 0.022" | 0.020" | 3800 - 7500 RPM | ||
| 126 | 94 | 34 | 48 | 86 | 308 | 313 | 254 | 254 | 0.534" | 0.534" | 0.026" | 0.024" | Race / Sky boat | ||
| 764R | 80 | 32 | 47 | 71 | 292 | 308 | 251 | 256 | 0.577" | 0.594" | 0.022" | 0.020" | Road / Drag 4000 - 7500 RPM | ||
| 392C | 76 | 44 | 47 | 73 | 300 | 300 | 254 | 254 | 0.560" | 0.560" | 0.022" | 0.018" | Road / Drag 4500 - 8000 RPM | ||
| 285C | 82 | 49 | 55 | 76 | 310 | 310 | 252 | 252 | 0.545" | 0.545" | 0.022" | 0.018' | |||
| 389 | 96 | 44 | 52 | 88 | 320 | 320 | 272 | 264 | 0.540' | 0.561" | 0.024"
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0.020" | Road / Drag | ||
| 745 | 88 | 48 | 51 | 81 | 316 | 312 | 273 | 273 | 0.640" | 0.640" | 0.026" | 0.024" | Drag only | ||
| 341 | 82 | 46 | 46 | 82 | 308 | 308 | 276 | 276 | 0.545" | 0.545" | 0.014" | 0.014" | drag only | ||
Notes -
* Fluted lifters recomended on all profiles.
* We have a large range of profiles, this is only a selection.
* Valve springs are critical for higher lift cams, spring platforms may require machining.
* *
