Yet another MSD crank trigger wiring question

[Rob Petrie E395]

It is a 93-97 LT1 Firebird so no cam sensor. Right now, it still has the Commander 950 Pro FI system in it. Yes timing through the C950. But I have the Holley HP system here now. Hopefully within the next couple weeks I can start installing it. Going to order the 554-118 Hull effect crank trigger you suggested and the 558-431 Cam/Crank harness unless you have a better suggestion. I see they say to use the 558-306 universal harness. I don't see a harness that is just for the Hull Effect Crank Trigger. Unless I buy the universal unterminated 306 Harness and make one. Will it hurt anything to use the 431 and just leave the cam sensor connector tied back out of the way?

Originally Posted by Robin Lawrence

There are a few possibilities here.

I am not a fan of the 2 wire magnetic crank sensor when triggering the Holley EFI.
I assume that you are running the timing through the Holley HP ECU.

I prefer the Holley 554-118 Hall Effect Sensor. It uses the same 4X Wheel and Bracket that you already have from MSD.

In the ignition configuration I would look at the settings for the crank sensor and the output to trigger the MSD box. The default signal output is 1.5ms. I have seen boxes that wanted more dwell time for the MSD box to trigger properly. Try 5ms and then 9ms if the 5 doesn't work.
Be sure that the crank sensor if setup to magnetic with the 2 wire MSD sensor and not digital.

Does this engine use a Cam sensor?

Robin