78 Ironhead dual spark plug heads.... HELP !!!

[Truco]

Hi, I just put the dual spark plug heads on my 78 ironhead.
How I connect the coils and wires??, I have a Dyna S dual fire and two Dyna 3ohms coils dual post.
Should I connect the coils in series?? Somebody can post a wiring diagram??, Thank you very much in advance.

[JBinNC]

With a Dyna S dual fire, with one electronic pickup on the backing plate, you need a pair of 6V coils wired in series. Dynatek can supply those coils. One coil will run the left side and the other, the right. That is a very efficient system for dual plug heads.

With a single fire Dyna S, with two electronic pickups on the backing plate, you need two 5 ohm coils, but your 3 ohm coils will do (they just won't last as long). In that case, one coil runs the front head and the other, the rear. This is actually a rather compromised system, but it is commonly done.

You will have to figure out where to mount the extra coil. I have nothing specific for you there. The Dyna S instructions include wiring diagrams for several set-ups.

Jim

[Truco]

Thank you very much for the advice
!!!!