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Technical Flathead coil mount

Discussion in 'Traditional Hot Rods' started by Wright & Sons, Jun 9, 2025.

  1. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    Hi all, I'm installing some Offy heads I picked up at Pomona a while back on an 8BA and the threaded holes where the coil bracket is attached have been welded / plugged, perhaps due to a repair done in the past (not sure).

    Seems I have two options:
    A) Drill and tap the head to mount the coil in its stock location
    B) Install the coil on the firewall

    I'm inclined to go with option B because I'm concerned that drilling the head will bring back whatever damage resulted in the repair in the first place, and figure having the coil mounted a bit further from the engine heat would be a benefit.

    Thoughts?
     

    Attached Files:

  2. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    Suppose I should mention the engine is in a 32 roadster (open, no hood) that is driven often, not a show car, and trying to maintain a traditional low-budget hot rod look/feel.
     
    chevyfordman and LOU WELLS like this.
  3. GordonC
    Joined: Mar 6, 2006
    Posts: 3,449

    GordonC
    ALLIANCE MEMBER

    I fabbed up a bracket to bolt mine on in those 2 holes that you have missing, but I think you could probably use the 2 head bolts right there to do the same thing. I hung mine out in the breeze so it won't overheat. Kind of hard to see in the pics.

    20250609_140943.jpg

    20250609_141015.jpg
     
  4. Petejoe
    Joined: Nov 27, 2002
    Posts: 12,530

    Petejoe
    Member
    from Zoar, Ohio

    I’ve seen some coils mounted sideways. You may already know but the coils are designed to be mounted vertically to keep cool.
     
  5. tarheelrodr
    Joined: Feb 6, 2007
    Posts: 171

    tarheelrodr
    Member

    I mounted mine horizontally on a homemade bracket that uses bolt from intake manifold but it’s an epoxy filled pertronix flamethrower.
     
  6. Bob Lowry
    Joined: Jan 19, 2020
    Posts: 1,584

    Bob Lowry

    Here is another idea..this is an early Mustang coil bracket that I have used in lots of tight
    situations..one bolt mounting and screw to tighten it. Just an idea for you.

    upload_2025-6-11_7-35-55.png
     
    Wright & Sons and alanp561 like this.
  7. 19Fordy
    Joined: May 17, 2003
    Posts: 8,297

    19Fordy
    Member

    Wright & Sons:
    Years ago, I made this custom coil mounting bracket that is held in place by one longer stainless socket head cap screw water pump bolt.. The OEM coil bracket bolts to the custom bracket. Works just fine and is out of the way as its not bolted to the 8BA aluminum head. Last photo shows dimensions. I also made one out of aluminum to match the heads. See post # 2 here:
    NEW products available thread - The Ford Barn More photos below.
     

    Attached Files:

    Last edited: Jun 11, 2025
  8. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    @19Fordy -- Thanks, I'm going to give that a shot -- I appreciate you sharing the dimensioned drawings too, very cool.

    @GordonC -- No concerns with the coil overheating in that aluminum cover?
     
    GordonC likes this.
  9. 19Fordy
    Joined: May 17, 2003
    Posts: 8,297

    19Fordy
    Member

    RE: No concerns with the coil overheating in that aluminum cover?

    No concerns so far. In fact, I wrapped the coil in insulation and then inserted it into the cover.
    The air blowing thru the radiator also blows against the coil to cool it. The engine compartment of a 40 Ford
    is not the best regarding air flow and it gets pretty warm with hood closed. If I get the chance, I will check the temp of the coil with a digital thermometer gun and post results.
     
    Wright & Sons likes this.
  10. adam401
    Joined: Dec 27, 2007
    Posts: 2,999

    adam401
    ALLIANCE MEMBER

    Let me throw this little curve ball. You can skirt the whole issue by running a magneto. Flatheads love em.
     
    Wright & Sons likes this.
  11. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 14,945

    Bandit Billy
    ALLIANCE MEMBER

    I fabbed the same bracket to hold a coil ribbed coil cover I bought from OTB gear. I made it out of SS and polished it then went another direction and hung it off the fan shroud. It bolted to the head using the two empty mounting holes on my 8BA. I angled it to match the distributor. This prior to polishing.
    upload_2025-6-11_13-3-33.jpeg
    Yeah, it's overbuilt, seems to be my MO. :cool: Mounted to the flathead
    upload_2025-6-11_13-4-56.jpeg
    I used the coil cover (no overheating BTW) but I put the bracket on the shelf 10 years ago and it's still there. You are welcome to it for the shipping. It is a pretty piece.
     

    Attached Files:

  12. GordonC
    Joined: Mar 6, 2006
    Posts: 3,449

    GordonC
    ALLIANCE MEMBER

    Haven't seen any negative issues with the cover on my my coil so far. Have over 700 miles on it and its running fine.
     
    Wright & Sons likes this.
  13. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    Thanks for the offer, very cool -- but those mount points are the stock coil mount location, right?
     
    Bandit Billy likes this.
  14. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    Nice, thanks -- I like the look of that cover.
     
    GordonC likes this.
  15. 19Fordy
    Joined: May 17, 2003
    Posts: 8,297

    19Fordy
    Member

    Just checked. After letting 8BA idle inside the garage for 1/2 hour. Engine temp. was 192.
    Outside of coil was 164.
     
    GordonC likes this.
  16. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 14,945

    Bandit Billy
    ALLIANCE MEMBER

    Yes, you can see them below. It makes a nice little move around that head bolt. Gusseted and reinforced for some reason. It's elegant and one of a kind.
    upload_2025-6-11_13-34-32.jpeg
     
  17. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    Likely a little more than I am wanting to spend.

    Looks great! Sending you a PM...
     
    Bandit Billy likes this.
  18. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    ...also "Gusseted and reinforced for some reason" made me laugh, I can relate.
     
    Bandit Billy likes this.
  19. J.Ukrop
    Joined: Nov 10, 2008
    Posts: 3,443

    J.Ukrop
    SUPER MODERATOR
    Staff Member

    I spent way too much time trying to figure out how to mount mine on my 59AB. I eventually landed on this solution. IMG_9124.jpg
    I took a stock 1940 Ford coil mount, elongated one of the holes, and mounted a generic chrome coil bracket.
    IMG_9205.jpg
    The end result is simple, clean, and uses the minimum amount of components. And if it was strong enough to work from the factory, it should be good for my use. We'll see!
     
    Wright & Sons likes this.
  20. Little Terry
    Joined: Oct 17, 2007
    Posts: 756

    Little Terry
    Member

    Here's a couple more ideas for you....
    IMG_3387.jpeg D210818D-C51F-4096-BA3E-6D126008CE37.jpeg motor2.jpg
     
    Desoto291Hemi and Wright & Sons like this.
  21. Wright & Sons
    Joined: Sep 2, 2024
    Posts: 18

    Wright & Sons
    ALLIANCE MEMBER
    from Tucson, AZ

    Thanks, guys this is all very helpful.
     
    Little Terry likes this.
  22. Jeff34
    Joined: Jun 2, 2015
    Posts: 1,180

    Jeff34
    Member

    I did a similar mount in the stock location on my 8BA. Standard Products finned coil. IMG_4861.jpeg IMG_4860.jpeg
     
    Wright & Sons likes this.
  23. mkubacak
    Joined: Jun 20, 2005
    Posts: 266

    mkubacak
    Member

    Do you have any issues with the electricity leaking out?
     
    J.Ukrop and Bandit Billy like this.

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