123ignition to signal ecu?, or do I need a cranck trigger? Options

[JeffBowlsby]

With all due respect, evidently our reasons for ownership run along different lines. I am retired and crossword puzzles bore me. I love a challenge, especially when it's technical and I can drive it when I'm done. As far as resale value, I could not care less. When the next owner acquires the car I will probably be dead. Where I live there is not a tuner within at least 150 miles. The fact that I will be tuning it myself by typing into a keyboard is very appealing to me. I didn't mean to take up your time. I was simply hoping that someone could give me an answer as to the output signal of a 123 distributor and the input signal for a stock ecu. Thanks for your time. (IMG:style_emoticons/default/beerchug.gif) Prost!

No worries! We encourage innovation and hope you will post your progress. We will be your biggest cheering section. (IMG:style_emoticons/default/driving.gif)

[barkamatic]

My mustangs tbi could care less about position of anything but the throttle (and a bunch of temp and pressure sensors). The computer does play with timing but really only to set the idle. And it knows that through the ignition module on the dizzy.

I bet you could get away with it since firing the cylinder is going to be determined by the distributor. If you keep it bank fire, timing the injection pulse need not be perfect and if that is the only thing the system is using the crank sensor for ...

Emory raises a valid point as long as you’re not trying to do sequential and the 123 is handling spark.

The biggest issue is the propensity of these dizzy drives to get installed out of time. But assuming you can pull any of this off, I’ll assume you’re capable of installing the dizzy drive correctly.

Most ECUs are expecting a Hall effect input for the crank signal. The D-jet and 123 is just providing a switched output like the trigger contacts but maybe you “invent” a MOSFET / “one shot” driver to convert to a Hall effect square wave voltage output? (IMG:style_emoticons/default/idea.gif)

As mentioned earlier not impossible but it’s not straightforward either

Exactly the info I was looking for. I guess I should start "inventing". Thanks for your help and all the responses. Hopefully I will have the engine back in the car within a couple weeks. I kind of got sidetracked with interior refurbishing. It will take a while but I will be sure to let everyone know the results. (IMG:style_emoticons/default/beerchug.gif) Prost!