Trailing Split Table

Note: This table is only visible when Engine Type is set to Rotary.

 

The Trailing Split function provides a means by which the spark timing of leading and wasted spark plugs can be individually adjusted.

 

The Trailing Split Table adjusts the timing offset in eccentric shaft degrees of the trailing spark relative to the leading spark. Positive numbers cause the trailing spark to happen before (advanced) the leading spark. Negative numbers cause the trailing spark to happen after (retarded) the leading spark. It is more common to use negative numbers in this table.

 

The main Ignition Table sets the firing point of the leading spark in actual eccentric shaft degrees.

 

The current Trailing Split angle can be viewed in the runtime values area of PCLink under the Ignition tab.

 

Trailing Split Example

If the main ignition table has an entry of 20 at a particular RPM/Load point, the leading spark will occur at 20 degrees Before TDC. If at the same RPM/Load point the Trailing Split Table has an entry of -6, the trailing spark will occur at 14 degrees Before TDC (ie 6 degrees after the leading spark).

 

If the main ignition table has an entry of 17 at a particular RPM/Load point, the leading spark will occur at 17 degrees Before TDC. If at the same RPM/Load point the Trailing Split Table has an entry of 4, the trailing spark will occur at 21 degrees Before TDC (ie 4 degrees before the leading spark).