this is supposed to be in the help? area of the software.... it's not working, so here it is for me to reference tomorrow...
ah winning... instructions for tomorrow...
1.0 CRANK SENSOR SETUP
1.1 Ignition Reference Setup – "one pulse per fire" trigger, Magnetic Pickup
The following shows how to setup the crank signal for a "one pulse per fire" RPM input using either a Magnetic pickup crank trigger or distributor.
A "one pulse per fire" trigger means there is one sensor pulse for every cylinder firing (on a V8 this would be a 4 pulse crank trigger or a 8 pulse trigger in the distributor).
NOTE: In the software, the Sensor Type should be setup as "Magnetic".
1. Note the Ignition Reference Angle set in the software. This is typically set to a value that is 10° more than the highest timing you will run.
Do NOT set it higher than 75°. 60° is a common value. 60° is used for an example here.
2. Turn the engine over so that it is at the Ignition Reference Angle. For this example it would be 60° BTDC on cylinder # 1
The timing pointer should be indicating 60° BTDC on the crank.
3. Align/turn the crank trigger or distributor so that the sensor is perfectly inline with the trigger.
• For a Magnetic pickup crank trigger, this means the pickup and a magnet should be inline.
• For a Magnetic pickup distributor, this means having one of the reluctor teeth line up with the Magnetic pickup.
4. Tighten every thing up.
5. If you are not using a cam sync (if you are, continue to section 2.1), everything should be set close enough to start the engine.
It is recommended that you disconnect the injectors and crank the engine over.
Look at the timing with a timing light. It should be firing at the cranking timing value shown on the data monitor.
If it is off a few degrees, you can move the pickup slightly, or change the Ignition Reference setting to sync things up.
If you change the Ignition Reference value, note that you must cycle the ignition power for it to take affect.
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2.1 Cam Sync setup when using a "one pulse per fire" crank input
For a "one pulse per fire crank" signal (e.g. a 4 pulse crank trigger on a V8), the cam sync signal must occur in a specific range to properly identify which cylinder is cylinder # 1 If this is not done properly, individual cylinder trims will not be performed on the correct cylinder, or worse, if using individual coils, the wrong cylinder will be fired, potentially damaging the started, flexplate, or worse.
The best way to determine the proper range is by using the following basic formula to determine the crank angle range that the cam identity can occur. An example is give afterwards along with a table that has certain combinations already calculated.
Cam sync location (degrees BTDC #1) = "Ignition Reference Angle" + "A" + ("A" / 2)
"Ignition Reference Angle" = Taken from Crank Sensor Setup in software
"A" = Angle Between Crank Pulses (crank degrees between triggers on the crank sensor)
"A" for a 8 cylinder = 90°
"A" for a 6 cylinder = 120°
"A" for a 4 cylinder = 180°
Using the formula above, plug in the "Ignition Reference Angle" you are using and the proper "A" value depending on the number of engine cylinders.
The location calculated is the "ideal" location and can vary +/- 30° or possibly more.
If you are out of this range contact Holley Tech Service for options.
Example - 8 cylinder with a Ignition Reference Angle of 60°
Cam Sync Location = 60 + 90 + 90/2 = 195 degrees BTDC #1
Cam Sync Location = 60 + 90 + 45 = 195 degrees BTDC # 1
195° would be the centrally "perfect" location for this specific example.
However, this location can vary by +/- 30 degrees from this nominal target value with no issue.
Number of Cylinders Ignition Reference Angle Cam Trigger Location Range (BTDC #1)
4 60 330 +/-30 degrees
6 60 240 +/-30 degrees
8 60 195 +/-30 degrees