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Supported triggers

The trigger type is set when the firmware is loaded into the ECU. If you need to change the trigger type, you need to upload the appropriate firmware.

Distributor shutter

It is intended for connection to a square-wave signal of a hall sensor in the distributor. Shutter angle 60deg on the crankshaft. If the shutter angle is different, it need to be adjusted by the zero angle correction.

Ignition advance is calculated when the shutter is exiting the hall sensor. Ignition while cranking is generated when the shutter is entering the hall sensor.

4 cyl shutter on the camshaft:

4 cyl shutter on the crankshaft:

Phasing options

  1. Separate camshaft sensor.
  2. Shutter cut at the first cylinder. Only suitable for camshaft shutter.

It is necessary to cut the rear edge of the shutter, which is used for the spark at the start, by 10% -15% (approximately 6-10 degrees). The program will detect the cut when phased injection or ignition is activated. Thus, it is possible to organize phased injection and ignition with the single hall sensor.

Audi trigger

3 sensors: angular impulse, TDC reference, phase

The system used mainly on 5-cylinder Audi engines.

  • The first sensor on the flywheel reads the teeth of the starter ring - connected to VR1+-
  • The second sensor on the flywheel reads the TDC reference - connected to DNO+ VR2-
  • The third sensor on the camshaft reads the 1st cylinder position - connected to DH1

2 sensors: angle and phase

  • The angular impulse sensor is located on the crankshaft, and has 12 teeth (Mazda, 1JZ) - connects to VR1+-
  • Inductive phase sensor - on the camshaft, reads 1 tooth - connected to DNO+ VR2-

On Toyota Celica, both sensors are located on the camshaft:

Missing tooth

60-2

The most common type of trigger. Suitable for any number of cylinders.

36-1 / 36-2

Used by American and Japanese manufacturers. Only suitable for an even number of cylinders.

36-2-1

Used by Mitsubishi

Positioning a DIY trigger wheel

  • set the crankshaft to the TDC position of the first cylinder
  • rotate the crankshaft forward by 10-15 degrees
  • position the trigger wheel so that the sensor looks at the missed teeth
  • rotate the crankshaft further, to the nearest TDC, and count the number of teeth that have passed the sensor.
  • write the counted value into the parameters

Double tooth (12+1)

Used by Honda

Nissan CAS

For Nissan optical sensors that generate 360 angular pulses per camshaft revolution. This is 180 pulses per crankshaft revolution. Therefore, it is necessary to specify 180 in the parameter "Teeth count".

The second sensor reads windows of different sizes. For synchronization, it is necessary to count the number of angular pulses that fit into the largest window. And then specify in the parameter "Impulses for sync" the number that is a little less (you need a margin for reliable reading)

If you have AEM 24-teeth disc - treat it as 12-teeth Audi-Trigger type:

  • angular impulse - to DH5
  • TDC impulse - to DH1

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