The EDIS system is a double ended coil designed for lost spark.  Like you said, the leading and trailing will be firing
at the same time.

When I have everything else shaken down and working, I'll add in the second 4-plug EDIS module.  This one is driven off
of a separate VR sensor, situated 185 degrees from the first.  Leading plugs will fire off the first module.  The wire
that had been going to the trailing plugs will be grounded.  All the energy that was being dropped across two plugs will
now be dropped one.  Twice the power.

The trailing plugs will be delayed by 5 degrees, but will have the same power as the leading.  The trailing will be
static (no input from the Megasquirt), and probably driven from a tiny generator mounted in the CAS's slot.  Basically,
it will be the equivalent of a magneto.  A self contained ignition source.  Hopefully, it won't require a rebuild at
500hr 8*)

 

Sounds good.

 

So long as the trailing plugs get distributed signals and never fire together. Two more points.

 

The further apart the two plugs in any housing fire the more it looks like a detonation event. The split idea is for small throttle settings, and to help with pollution so the cars can be sold in the Peoples Republic of California. 

 

Years back when racing Fiats, I removed the points cam and replaced it with the reluctor from a Chrysler electronic distributor. Added a Chrysler pickup (modified) and brazed the advance plate solid to eliminate movement. This was run through a Chrysler amplifier (about $12.00 back then) and gave us a rock solid ignition system. A non impulse magneto so modified would have no wear parts at all.

 

OK three things. The distributor drive gear on the crank is up for some wear stress. The drive gear on the distributor and the crank angle sensor is not, and will gleefully drop iron dust into the oil when heavily loaded.

 

Now back to our regularly scheduled programming.

 

Lynn E. Hanover