2 edis 4s for a v8

[hessdawg]

hi everybody
been reading a bunch for my edis conversion for my olds 455
can i use 2 edis 4 with the coil on plugs or ??
run and edis 8 with any coil on plugs??

[trakkies]

I think I read here that Ford Mustang COP will work with EDIS if the coils are wired in series.

I don't think you could use two EDIS 4 units on an 8 cylinder. Although you might get them to fire correctly stand alone by using two sensors, the signal MS sends to control the timing is different between 4 and 8 cylinder units, as it relates to the tach signal from them. I think. ;-)

[Heribert]

Philip Lochner has solved the issue with two EDIS 6 on a V12. Requires an interface unit to phase the SAW signal to the second EDIS module
Find Philip and ask him, I even think he has an adapter kit for sale.

But for a V8, there is really no need . Use an original EDIS 8 and run it as per manual- the best wasted spark system that money can buy!

Heribert

[kjones6039]

I think I read here that Ford Mustang COP will work with EDIS if the coils are wired in series.

Wouldn't those actually need to be in parallel Dave? The EDIS8 controller has 4 outputs (A,B,C &D) and should be able to drive 4 sets of coils in parallel?

Ken

[hessdawg]

so i can use an edis8 and any COPs from ford ran in parallel?

[trakkies]

I think I read here that Ford Mustang COP will work with EDIS if the coils are wired in series.

Wouldn't those actually need to be in parallel Dave? The EDIS8 controller has 4 outputs (A,B,C &D) and should be able to drive 4 sets of coils in parallel?

Ken

Dunno. Here's the complete post from Matt:-

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Re: Coil on plug with EDIS

Postby Matt Cramer on Mon Oct 11, 2010 1:00 pm
It's proven to work with Ford Mustang COP coils if you wire them in series. Other coils are something of an unknown.

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My guess is wiring each pair in series is a better match to the coil driver in EDIS. It may not be able to supply enough current if they're in parallel.

[kjones6039]

Must be going into brain fade here........

Series certainly makes sense to me also! As long as you are able to fire 2 coils at a time EDIS should work. Matt would certainly be the one to defer to in this case.

Sorry for jumping in so quickly Dave.

Ken

[trakkies]

Must be going into brain fade here........

Series certainly makes sense to me also! As long as you are able to fire 2 coils at a time EDIS should work. Matt would certainly be the one to defer to in this case.

Sorry for jumping in so quickly Dave.

Ken

Not a problem. It's best to make sure such things ain't just a brain fart on my part. ;-)