This page is to help with setting up the Primary Trigger option
Specifically for the VAG 60-2 wheel, but it will contain general information
MegaTune is an easy way to setup the trigger values, but you need to know what you are changing.
current decimal values
Primary Trigger
- Edge -- Rising
- Type -- Multitooth
- Filtering -- Disabled
- Tooth Relation (Usually Disabled) -- Disabled
- TDC after trigger (degrees) -- 60.0 though I am guessing it should be 6dbtdc
- Number of teeth on wheel -- 58 actual nubs
- Trigger Tooth -- 3 The third nub after the space (trailing/leading??)
- Next Trigger Tooth -- 15 (V8) or 20 4clyn
- Crank minimum period (usec) -- 1280
- Angular width of tooth -- 2 shouldnt this be 360/(# of teeth + missing teeth 360/60 = 6
- Tooth Relation to Normal (usually 181) -- 181
- Tooth Relation to Missing (usually 118) -- 118
- Angular width of missing tooth -- 6 ( shouldn't this be 12)
- Engine Phase, when reset -- 240
These are all you settings, but these are not normally how motorheads describe thier motors or triggers.
Typical Descriptions
- TDC -- Regular meaning when #1 cylinder is at top of rotation
- Number of actual teeth on wheel
- Number of missing teeth on blank spot on wheel if there were teeth there
- Relation of blank spot to TDC this would be in degrees
- Leading egde angle from TDC
- Trailing egde angle from TDC
So using these values how do we get the other ones.