Centrifugal Advance
Centrifugal Advance| Advance No. Note: Identification number stamped on distributor housing. If unit is checked on vehicle, double the RPM & degrees to get crankshaft figures. | Centrifugal Advance Starts Note: On models not equipped with centrifugal advance mechanism, ignition timing controlled by ignition control module. | Intermediate Advance A | Intermediate Advance B | Full Advance |
| R241 | 0 at 500 Degrees At RPM (deg @ rpm) | 4 at 750 Degrees At RPM (deg @ rpm) | 10 at 1500 Degrees At RPM (deg @ rpm) | 16 at 2250 Degrees At RPM (deg @ rpm) |
| R243 | 0 at 450 Degrees At RPM (deg @ rpm) | --- | 8.5 at 1000 Degrees At RPM (deg @ rpm) | 15 at 2000 Degrees At RPM (deg @ rpm) |
| R246 | 0 at 600 Degrees At RPM (deg @ rpm) | 10 at 950 Degrees At RPM (deg @ rpm) | --- | 19 at 2500 Degrees At RPM (deg @ rpm) |
| R248 | 0 at 550 Degrees At RPM (deg @ rpm) | 7 at 800 Degrees At RPM (deg @ rpm) | 12.6 at 1500 Degrees At RPM (deg @ rpm) | 18 at 2250 Degrees At RPM (deg @ rpm) |
| R258 | 0 at 550 Degrees At RPM (deg @ rpm) | 4 at 750 Degrees At RPM (deg @ rpm) | 8 at 1500 Degrees At RPM (deg @ rpm) | 13 at 2450 Degrees At RPM (deg @ rpm) |
| R269 | 0 at 550 Degrees At RPM (deg @ rpm) | --- | 14 at 1375 Degrees At RPM (deg @ rpm) | 23 at 2600 Degrees At RPM (deg @ rpm) |
| R272 | 2 at 350 Degrees At RPM (deg @ rpm) | --- | 6.3 at 1000 Degrees At RPM (deg @ rpm) | 16 at 2500 Degrees At RPM (deg @ rpm) |
| R318 | 0 at 550 Degrees At RPM (deg @ rpm) | 3 at 750 Degrees At RPM (deg @ rpm) | --- | 9 at 1920 Degrees At RPM (deg @ rpm) |
| R319 | 0 at 550 Degrees At RPM (deg @ rpm) | 5 at 1500 Degrees At RPM (deg @ rpm) | --- | 7 at 1920 Degrees At RPM (deg @ rpm) |
| R324 | 0 at 550 Degrees At RPM (deg @ rpm) | 7 at 1100 Degrees At RPM (deg @ rpm) | 20 at 1600 Degrees At RPM (deg @ rpm) | 31 at 2500 Degrees At RPM (deg @ rpm) |