Haltech E6X Manual Win Version - Manual (Page 138)

E6X Manual
138
Trigger Angle
The trigger angle is simply the angle before top dead centre (BTDC) at which the trigger
event occurs. The trigger device used must produce at least one trigger event for each ignition
event and each trigger must occur a constant angle BTDC. This value must be greater than the
maximum advance you wish to run plus approx 10 deg. Therefore if the maximum advance
you wish to run is 40 deg, the Trigger Angle value should be set to at approx 50 deg. If the
Trigger Angle value is set too low, the ignition timing will not be able to achieve the full
advanced set in the ignition map/s.
In the two diagrams below, the crank pulley can be seen in two positions. The first diagram
shows the position of the engine at TDC. The second diagram shows the engine at 70 deg
BTDC. Coinciding with the engine being at 70 deg BTDC is the alignment of the CYL 1 REF
with the Sensor Pickup. The Trigger Angle (in the Trigger Setup page) for this setup would be
70 deg. Please note that only the trigger event for CYL 1 has been shown. A real trigger
wheel will require a trigger event for each cylinder.
Engine at TDC
TDC
Harmonic
Balancer
Engine Timing Mark
Sensor Pickup
C
Y
L
1
R
E
F