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Projects 8ba plug lead layouts

Discussion in 'Traditional Hot Rods' started by Little Terry, Jul 28, 2020.

  1. Little Terry
    Joined: Oct 17, 2007
    Posts: 459

    Little Terry
    ALLIANCE MEMBER

    I can’t get past the look of the distributor, coil and plug leads on an 8ba, which (IMO) doesn’t look as nice and symmetrical as the earlier motors.

    I would be really interested to see what you have done to your 8ba to tidy up the HT lead arrangement, as I will be rebuilding my first flathead very soon. I am struggling for inspiration on this one!

    This appears to be the standard sort of layout....

    [​IMG]

    Cheers
    Mark
     
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  2. 51504bat
    Joined: May 22, 2010
    Posts: 2,010

    51504bat
    ALLIANCE MEMBER

    Nothing fancy on my 8ba but it works for me. Not the best photos. Hot and sunny right now in SoCal. wires.jpg wires3.jpg wires6.jpg
     
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  3. V8 Bob
    Joined: Feb 6, 2007
    Posts: 2,640

    V8 Bob
    ALLIANCE MEMBER

  4. Pete1
    Joined: Aug 23, 2004
    Posts: 1,784

    Pete1
    Member
    from Wa.

    It is extremely important to keep the wires separated as V8 Bob has done.
    Capacitive discharge/leaking between wires can turn a well built engine into a pig.
     
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  5. 3340
    Joined: Jun 4, 2010
    Posts: 556

    3340
    Member

    [​IMG]


    Sent from my iPhone using H.A.M.B.
     
  6. Blake 27
    Joined: Apr 10, 2016
    Posts: 623

    Blake 27

    A Virtex HEI with internal coil cleans up the whole area. Nice Flathead.jpg
     
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  7. Pete1
    Joined: Aug 23, 2004
    Posts: 1,784

    Pete1
    Member
    from Wa.

    Metal wire looms are the worst possible thing you could use. They can cut the spark plug current by 4 milliamps.
     
  8. 19Fordy
    Joined: May 17, 2003
    Posts: 6,860

    19Fordy
    Member

    Here's an 8BA. Spark plug looms are modified originals. Wires are 8MM.

    Aluminum coil bracket that bolts to water pump bolt is home made.
    Same bracket can be made using steel. It's great because the coil no longer has to be bolted to the head. It gives a cleaner look to engine.
     

    Attached Files:

    Last edited: Jul 28, 2020
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  9. belair
    Joined: Jul 10, 2006
    Posts: 8,464

    belair
    Member

    RICH B and shawnsauto1 like this.
  10. 19Fordy
    Joined: May 17, 2003
    Posts: 6,860

    19Fordy
    Member

    There are also wire looms that run the wires along the bottom edge of each head.
     
  11. Blake 27
    Joined: Apr 10, 2016
    Posts: 623

    Blake 27

    A few examples I found. To my eye plug wires exiting straight out of the cap seem to be easier to rout and look better. I agree with belair about using black wires which seem to be less conspicuous. _DSC6882.4.jpg 1deb72f4940ad69cca12bcaba8914965.jpg 13316984_1143639665678365_344072265422597055_o.jpg DSC_2917.jpg IMG_0099~photo.jpg IMG_5293.JPG IMG_6250.JPG
     
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  12. Blake 27
    Joined: Apr 10, 2016
    Posts: 623

    Blake 27

    One more. Here the builder appears to have run the driver side wires in front of the motor, pretty neat idea! 100_5383 (2).jpg
     
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  13. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 6,659

    Bandit Billy
    ALLIANCE MEMBER

    Pardon the glare but I used the chrome looms as well and re-made the braces that allowed me to attach them using the blower bolts so they appear to hover over the heads. I used 7.5mm cloth covered, carbon suppressor core wires for the MSD system.
    upload_2020-7-30_14-21-2.png
     
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  14. 19Fordy
    Joined: May 17, 2003
    Posts: 6,860

    19Fordy
    Member

     
  15. Pete1
    Joined: Aug 23, 2004
    Posts: 1,784

    Pete1
    Member
    from Wa.

    People spend thousands of dollars to make an engine go fast and then bolt stuff on the outside that takes hp away.....
    (wire looms and cloth covered wire)
     
  16. sloppy jalopies
    Joined: Jun 29, 2015
    Posts: 4,071

    sloppy jalopies
    ALLIANCE MEMBER

    I ran an 8ba engine with 59ab plug wire looms, I cut the 90* bend off a steel legged chair from work, welded it to the shortened left loom... it crossed over the intake and to about 3" from the cap.... beware as [4] thicker plug wires won't fit inside the looms/90*...
    I think I used 7 mil or smaller... canvas covered stockers may fit fine... my couple cents.
     
  17. jockeyshift41
    Joined: Mar 23, 2020
    Posts: 50

    jockeyshift41
    Member
    from Florida

  18. solidaxle
    Joined: Jan 6, 2011
    Posts: 462

    solidaxle
    Member
    from Upstate,NY

    IMG_20190923_123054.jpg IMG_20190923_123224.jpg What I did is take the earlier wire looms, cut off the angle that went originally down to the dizzy on the pre 49 flatheads. Welded the flute back on to the end. Blake 27 showed a pic of my motor. Here's a couple of better shots.
     
  19. banjorear
    Joined: Jul 30, 2004
    Posts: 3,788

    banjorear
    Member

    Pete,

    What about the Ford type of looms found on earlier motors? Same issue?
     
  20. Flathead Dave
    Joined: Mar 21, 2014
    Posts: 2,911

    Flathead Dave
    ALLIANCE MEMBER
    from So. Cal.

    Mine is stock as stock can be, I won't change a thing for the look.
    I do need to clean up the plug wires...
     

    Attached Files:

  21. stuart in mn
    Joined: Nov 22, 2007
    Posts: 1,777

    stuart in mn
    Member

    Please explain.

    You know that modern cloth covered wire is just regular insulated wire with the cloth sheath added, yes?
     
    Last edited: Jul 31, 2020
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  22. flat 39
    Joined: Dec 31, 2007
    Posts: 226

    flat 39
    Member

    clean and simple
    engine view.jpg
     
  23. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 5,076

    Ebbsspeed
    ALLIANCE MEMBER

    The issue is more of inductance causing cross-firing if the plug wires are run side by side in a bundle for any significant length. It looks good to have them all lined up straight, but if you are getting an occasional miss or backfire that you can't figure out, and you have your plug wires neatly bundled, try separating them as a troubleshooting method. They should cross over each other a couple of times, especially if you've got a real hot-assed ignition system.

    Inductance is the electrical magic that makes transformers (coils) work. One of the neatest things I've seen where inductance was used was a neon lighting installation done by a friend of mine. He lived on a farm in western Minnesota, and their land had a 345,000 volt power line traversing it. Just outside of the power company right of way he ran a half-mile of "electric fence", but instead of keeping the cows where they were supposed to be, he used the inducted voltage in the fence to light a few neon tubes in his shop.
     
    Last edited: Jul 31, 2020
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  24. solidaxle
    Joined: Jan 6, 2011
    Posts: 462

    solidaxle
    Member
    from Upstate,NY

    I agree with the above statements. Auto manufactures turned to separating wires. Having damaged or old leaking wires exasperates the problem. However, my 8ba with the early wire looms runs without misses.
     
  25. JWL115C
    Joined: Jan 28, 2010
    Posts: 153

    JWL115C
    ALLIANCE MEMBER

    It also helps to separate the wires on the two cylinders on a V-8 which fire in sequence (e.g. 1-8-4-3-6-5-7-2) to reduce "inductance firing". In this example separate 5 and 7.
     
  26. solidaxle
    Joined: Jan 6, 2011
    Posts: 462

    solidaxle
    Member
    from Upstate,NY

    I know what you mean JWL115C but I prefer 1-5-4-8-6-3-7-2. :D
     
    Bandit Billy likes this.
  27. Model A Gomez
    Joined: Aug 26, 2006
    Posts: 1,290

    Model A Gomez
    Member

    I used Speedway chrome wire looms and ran the wiring to the left bank under the generator, still had a big bundle of wires at the distributor. The coil is mounted to the generator bracket right under the generator. . plugs1.jpg plugs.jpg
     
    leon bee likes this.
  28. Boden
    Joined: Oct 10, 2018
    Posts: 717

    Boden

    Oh really!?!? Very good to know. I have some adjustments to do


    Sent from my iPhone using H.A.M.B.
     
  29. Boden
    Joined: Oct 10, 2018
    Posts: 717

    Boden

    [​IMG]


    Sent from my iPhone using H.A.M.B.
     

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