Haltech E8 - Manual (Page 35)

Haltech E11/E8 Instruction Manual
Ignition Setup
Figure 29 - Ignition Setup Page
Timing Group
• Lock Timing - When this setting is checked, the ignition advance is fixed to the value described in
Lock Degrees BTDC.
• Lock Degrees BTDC - The ignition advance angle used when Lock Timing is enabled.
• Trigger Angle BTDC - This is the angle between the trigger input and the corresponding piston’s
(or rotor’s) TDC. For multi-tooth triggers such as those found on Toyota’s, Honda’s and Mazda’s,
the trigger point is the tooth defined by the Tooth Offset that is described below. The trigger angle
must be between the largest intended advance angle and the angle between trigger events.
E.g. If the largest ignition advance angle you wanted to use was 32 degrees on a 4 cylinder engine, then
your trigger angle must be between 32 to 180 degrees. Angle between triggers for a 4 cylinder is 720/4 =
180 degrees. For more information on how to set the tooth offset and trigger angle correctly please refer to
the quickstart guide you received with your ECU.
• Tooth Offset - The tooth offset is the number of teeth from the Home signal to the tooth that is
chosen to be the trigger tooth. The trigger tooth should be chosen so that the trigger angle can be
dialled into the range described below. If this field is grey and not able to be changed, then ignore
this parameter, as it does not apply for the given trigger.
Setting the Base Timing
Copyright © Haltech 2008 Page: 35
Note : Setting the base timing correctly is the most imporatant step in getting the Haltech
ECU to operate correctly. If the base timing is not set correctly none of the software
settings will be correct. This is the most important step in the setup procedure.