Holley dual sync distributor

Hi

Ford v8 with Ecu master pro 8. I need help to setup the distributor in software.

Specs from manual:

CRANK SENSOR Type – 1 pulse/fire Sensor Type – DIGITAL FALLING Ignition Reference Angle - 50.0 degrees

CAM SENSOR Type – Single Pulse Sensor Type – Digital Falling

Thanks!

Share your current file and someone can help set it up. Thats an easy piece to make work.

Since its in the distributor, you take account for revolutions. Every 2 revs of the crank is 1 of the distributor. The 1 pulse fire is now a 4 pulse multitooth with a single pulse sync. Find your TDC angle and you are set, check with timing light then check for inductive delay with locked out timing. You can verify the trigger by taking a scope trace and posting it. Engine phase may need inverted.

Thank you Joshua. First time making a base map :slight_smile:

When looking at the crank shutter I count 8 teeth and the cam shutter is about 4 teeth long (nearly 180 degrees). Regarding the ignition reference angle, does it need to be 50 degrees? What dictates the degrees?

Distributor manual

Map

Thanks!

You count 8 teeth yes, but the distributor is a 1x fire. Meaning it only turns over half a revolution to 1 crank rev. So you have 4 teeth per revolution.

With the base angle. You are setting the base angle where the falling edge of the cam trigger is. Thats what the LED setup should get you. It may need to be altered to the opposite side. On multitooth the edge of the sync will signify your 0 degree. So the trigger setting would be either 50 degree or 670.

Fount this picture of a scope trace from a dual sync.

Thanks Joshua it makes sense now :grinning_face: Another question, where do I assign a four wire idle stepper motor?

Under Idle enable airflow and you will get options. Select bi polar stepper and the 2 h bridges its wired to.

Thank you Joshua :+1: