EDIS Spark Cut Thoughts

[adrianpike]

So as most of us know, there's no easy way to actually cut spark on an EDIS-fired system, aside from using the wheel decoder code. Yeah yeah, I'll do that eventually. This is nerdier though. :ninja:
Here's my crazy idea for how to have a decent cut that doesn't blow your tranny out the bottom of the car. Rip it apart and tell me how it'll never work, so I can try and improve upon it.

The simple and easy way (and the way I'll be whipping up soon, perhaps even this evening :twisted: ) is to just leave a coil on dwell, by grounding it out. Let the EDIS module lift its grounds all day long happy as can be, and just keep your own independent ground of the coil -. Coil doesn't fire, and theoretically EDIS shouldn't ever notice. I'd do it using a normal relay, one end on the coil -, the other side on ground. It would be controlled by an additional MS output, set to go high when I cross a set RPM threshold.

There are a few problems with this simple method, assuming it'll even work. If you were to ground out both coils at the same time, you're dropping 4 sparks per revolution. Ow. If you were to ground out just one coil, you'll be dropping 2 sparks per revolution, but that one coil will have a dwell of the gods, and those two cylinders will be doing... :e-shrug:

So, why not a circuit to bounce between grounding the two coils? Just watch one of the EDIS coil outs, and every two outs, switch which coil is being grounded? 2 sparks per revolution, but every revolution it changes which coil is being grounded?

Thoughts?
(yeah yeah wheel decoder yeah :-P )

[The Aspirator]

Your nerdy ability pwns us all. Try it and see. Post video.

[linuxman51]

a simle flip-flop circuit wouldn't be that difficult to lay out, the question becomes when/how you activate it and ensure that it stays active.
I supose you could use a programmable output set with the same values as the launch control, and have it trigger the circuit. Shouldn't be that difficult.