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  1. #1
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    Default 78 Ironhead dual spark plug heads.... HELP !!!

    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.

  2. #2

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    Dec 2018
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    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

  3. #3
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    Thank you very much for the advice
    !!!!

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