Subpage of Base setup menu


Primary trigger settings

Edge
Always rising for VR type sensors, and typically falling for Hall sensors.

Type
Coil-type is for all trigger setups without missing tooth.

Missing Tooth Type
Set how many missing teeth you have on your trigger wheel.

Special Trigger Type

TDC After The Trigger
Number of crankdegrees from the trigger tooth to TDC. This is where you calibrate the ignition angle using your strobe light. Normally minimum 40 degree, some motorbikes needs ~10degree for cranking

Number Of Teeth On Wheel
Enter the number of actual teeth on your trigger wheel.
Example : 58 teeth for a 60-2 wheel.

First Trigger Tooth
This determines what tooth to start counting TDC After The Trigger from. This can never be larger than Next Trigger Tooth - 1. The first actual tooth after the missing one(s) has index 0.

Next Trigger Tooth
Enter the number of teeth between cylinder events.
Example : 30 teeth, on a 4 cyl 4-stroke engine with 60-2 wheel.
Remember to set the tooth reference table!!

Angular Width Of Tooth
Actual angle between two teeth on the wheel.

Example of angular width of tooth

Generally value should be 360/(Number of teeth per crank rotation (+1 or 2 if missingtooth))

Crank Min. Period
Only used for coil-type as a simple filter. This parameter is the shortest time allowed between trigger teeth.' It lowers the risk of false triggering, especially on low count trigger wheels.

Filtering
The simple filter is mostly used for coil-type trigger, doesn't make sense with missing-tooth. It disables triggering for the first half of the trigger pulse to avoid noise problems.

Advanced Filtering
This is only for missing-tooth, you can specify the relative time difference allowed for a normal tooth and the missing tooth.

RPM can change relatively much during 30 degrees (12 cranktooth) during cranking, especially with a high compression engine. Not an issue with 60-2. We had to enable multitooth advanced filter on a home-grinded 12-1 (made from 12 tooth) VR trigger to crank. Otherwise the normal toothtimes (as shown by external triggerlog analysis) were sometimes x1.59 or even x1.62 of previous tooth, therefore misdetected as missing tooth by the normal 150% threshold -> no start. 175% threshold seems to work: missing tooth was between x2.02 to x2.31.

These are the settings for the advanced filter:

Example of advanced filter settings
x-1 trigger, Normal=25..169%, missing=169..288%
x-2 trigger, Normal=25..175%, missing=200..413%

For 12-1 missing tooth wheel "advanced missing tooth filter=enabled" with normal_tooth_max=175 and missing_tooth_min=175 recommended. (especially if it does not start with cranking, and trigger wheel errors occur. Try triggerlog during cranking).

Explanation: RPM can change relatively much during 30 degrees (12 cranktooth) during cranking, especially with a high compression engine.

Hall dirac filtering: Some installation of Hall sensors occasionally there are very small noise pulses (like dirac pulses). Only for problematic, noisy low toothcount HALL sensor (max 24 tooth AND trigger signal stays min 10 crankdegrees after chosen edge). It is not recommended anyway, unless it is really needed.
Must not be set for VR trigger at all.

For other special triggers use the configlets below this dialog.