Dual ign system question

[Roger Heflin]

On Thu, 17 Feb 2000, nacelp wrote:

> 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
> 

I though NASCAR switched from one to the other and did not run both at
the same time.  I remember them needing to switch something to go th
the backup ign systems.    I was thinking using some diodes to prevent
reversal, but with the voltage being in the range of 50Kv that would
require 50 or so diodes that each were able to stop 1000V (the biggest
I have normally seen).   Of course if I could get a diode that would
stop ign voltage and it only cost $5 or so for each it would be
dooable (16 diodes $5 each I could live with).

				Roger

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