Ignition Compensation

Top  Previous  Next

Important Note

Do not use the ignition compensation to compensate for poor running resulting from other problems. Also note that changes made to compensation tables do not take effect until the ignition is switched off, engine re-started and run for several minutes.


Air Temperature Compensation

This allows the ignition advance compensation by air temperature to be adjusted. The stock behaviour is to retard the ignition timing as the intake air temperatures increases.  Note that this retard is to prevent knock at higher intake temperatures, so the retard value is subtracted from the knock ignition limit.




Low Water Temperature Ignition Advance

With lower coolant temperatures the ignition is advanced to offset the slower mixture burn rate.




High Water Temperature Ignition Retard

The ignition is retard as the coolant temperature increases in order to prevent knock.




Ignition Dwell Angle

The ignition dwell angle determines the amount of time the ignition coil charges before discharging to the spark plug. Up to a point, a longer charge time will result in a higher voltage spark.


Advanced Feature: If you are unsure what this feature does do not change this table.   Increasing the coil charge time will increase the temperature of the coil, possibly damaging the ignition coil.



Dwell Angle - sets the coil dwell angle in crankshaft degrees..


Voltage Compensation - compensates the dwell time based on battery voltage. Since the ignition coil will provide a higher voltage spark when the battery voltage is higher, the dwell angle can be reduced. The converse is true when the battery voltage is low.