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Technical Sideways mounted coil? Measuring Ohms?

Discussion in 'The Hokey Ass Message Board' started by Squablow, Jul 1, 2021.

  1. Yes, of course. A 6V ignition system and a 12V system with a ballast resistor could easily use the same coil if the physical connections are the same. Again, a 1.5 ohm primary coil resistance is common to both systems in most older points-style automotive applications.
     
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  2. Budget36
    Joined: Nov 29, 2014
    Posts: 15,026

    Budget36
    Member

    Just to make things clear, for anyone following what I’ve put up, it’s not to argue but to learn more.
    Yes, at near 60 I can learn a lot. Steve and Jim have mentioned, said enough to make me open my eyes wider.

    Okay, glad @Squablow got it running right!
     
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  3. Squablow
    Joined: Apr 26, 2005
    Posts: 18,253

    Squablow
    Member

    I'm still not convinced it's right, it's possible the advance in the distributor is not working and I just found a happy medium where it seems to run well enough, but this has definitely taught me a lot about ignition systems that I did not know before.

    I will get it timed properly and check the function of the advance and report back on the Stromberg distributor when I can.
     
  4. flatjack
    Joined: Feb 13, 2007
    Posts: 981

    flatjack
    Member

    I am not a fan of ballast resistors. I use a 1.5 ohm coil with a 6 volt system and a 3.5 ohm coil with a 12 volt system.
     
  5. Not that it has anything to do with the problem under discussion; but
    Ford used ignition ballast resisters; under the metal shield on the inside of the firewall in the '30s and under a similar shield mounted right on the coil in the '40s; I don't know if they continued later.
    fd-220.jpg
     
    Last edited: Jul 3, 2021
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  6. MeanGene427
    Joined: Dec 15, 2010
    Posts: 2,307

    MeanGene427
    Member
    from Napa

    Yep, looks just like the resister on the 9N-2N-8N and some later 6V tractors- even my 850 had one
     
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  7. G-son
    Joined: Dec 19, 2012
    Posts: 1,473

    G-son
    Member
    from Sweden

    Any particular reason?
     
  8. Truck64
    Joined: Oct 18, 2015
    Posts: 5,325

    Truck64
    Member
    from Ioway

    What were the ohms for the ignition coil and ballast resistor in the 6 volt system? I've heard they used ballast resistors as well, but I could never figure out why.
     
  9. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,985

    2OLD2FAST
    Member
    from illinois

    Dwell changes timing .
     
  10. bigdog
    Joined: Oct 30, 2002
    Posts: 794

    bigdog
    ALLIANCE MEMBER

    Sorry for the off topic post, but since this picture was posted.... There is a tool for alinging points. It used to be standard procedure to check every set installed. And there's even a tool for doing it. Mine vanished years ago, but I found a picture on the interweb.
    point tool.jpg
     
  11. blowby
    Joined: Dec 27, 2012
    Posts: 8,663

    blowby
    Member
    from Nicasio Ca

    Yesterday I realized a prior owner put an Autolite coil on my Chevy. Previously I had noticed the ballast resistor had been removed, and I put one back on. I'm measuring the coil at about 3.5 ohms. So now I'm at about 5 ohms when running. Seems to start and run fine. Book spec on my car are 1.5 for both coil and resistor. Guess I'll stick a Delco back on it.

    So did Ford use these coils without a resistor or starting circuit?
    20210709_154248.jpg
     

    Attached Files:

  12. Truck64
    Joined: Oct 18, 2015
    Posts: 5,325

    Truck64
    Member
    from Ioway

    12 volt point systems had a resistor divider network, for the start system. ~ 1.4 ohm coil and 1.4 ohm ballast

    A 3.5 ohm coil, maybe that was used with Duraspark or something like that?
     
    blowby likes this.

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