Dual ign system question

[nacelp]

MSD makes a devise for being able to run two coils, with a single output
(NASCAR item), that sounds like what your looking for.  I haven't a clue
about price.  It would seemingly have to include a diode od some sort so
that a shorted secondary in one coil wouldn't effect the others output.  I'd
also venture a guess that the small aircraft or experimental aircraft groups
might have something similiar.
Grumpy


> On my car right now I have two fully functional ignition systems.
> Both have coils and plug wires, on one system is setup to generate
> spark at one time.   Is it possible to have one wire running to a plug
> and two different systems feeding that wire with spark?   Would one
> coil sparking backfeed the other in a bad manner and possibly damage
> one system or both systems?
>
> One system is a DIS system and the other is a basically a classic
> coil/distributor type setup.  I would expect both systems to fire at
> roughly the same time, but I could adjust the dis system to fire
> several degrees after the optimal fireing position that would be taken
> by the coil/distrubitor setup.
>
> Roger
>
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