Crank Sensor

Hey Bill. You're correct on what I'm wanting to do. The shutter wheel in the distributor has eight slots, one of which is offset for the #1 reference. Been looking at various Magnum flywheels, the '92-'95 won't work as is, has eight slots, four too many unless I weld up four and offset one of the remaining four, and I'm beginning to suspect that may be the best/easiest/cheapest solution overall, and here's why.

I've considered the eight pin GM module conversion, piggy backing the 5v reference to the PCM, pin R, to pin E, which would probably cause a voltage drop problem to deal with.....or simply running two modules, one switching the 5v square and providing a clean signal to the PCM, and the other to trigger the coil.

What I don't know is what effect the lack of a #1 reference will have on the PCM. Maybe none, maybe a seizure. I've kicked around the idea of widening one lug on the reluctor to delay the mag pickup's voltage drop, hence the trigger point and creating an offset signal that way, but that would give one cylinder late timing, so that's not an ideal solution.

The other thing to consider is the movement of the advance mechanisms screwing with the PCM since it's expecting a stable reference point. It may read the movement as an increase/decrease in RPM and do weird things with the fuel. Or not......

The only way I'd know would be to try it, but....right now the new engine's in the truck but not hooked up, and all the sheetmetal is still off too. If I'm going crank sensor, now's the time. Another consideration......welding the slots in the flex plate may cause the pickup signal to be "dirty" if the metal thickness and magnetic properties aren't uniform. Overall it's an interesting conundrum, but if I wanted boring and easy I'd drive a Chevy.