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History Firestone spark plugs, did not know.

Discussion in 'The Hokey Ass Message Board' started by Bird man, Jan 1, 2026.

  1. Bird man
    Joined: Dec 28, 2009
    Posts: 1,036

    Bird man
    Member
    from Milwaukee

    I was a little surprised to read that Firestone had their own spark plug factory, dating back to at least the 30's. Didn't just brand someone else's product. Bet there is some interesting history there.
    Also wonder what the environmental legacy is.
    Check out the bad boy below! Must have seemed like a great idea at the time...
    P1016226.JPG
     
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  2. Budget36
    Joined: Nov 29, 2014
    Posts: 15,373

    Budget36
    Member

    Now I have to google Polonium.
     
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  3. DDDenny
    Joined: Feb 6, 2015
    Posts: 22,580

    DDDenny
    Member
    from oregon

    "Polonium spark plugs were marketed by Firestone from 1940 to 1953. While the amount of radiation from the plugs was minuscule and not a threat to the consumer, the benefits of such plugs quickly diminished after approximately a month because of polonium's short half-life and because buildup on the conductors would block the radiation that improved engine performance. (The premise behind the polonium spark plug, as well as Alfred Matthew Hubbard's prototype radium plug that preceded it, was that the radiation would improve ionization of the fuel in the cylinder and thus allow the motor to fire more quickly and efficiently.)[79][80]"


    https://en.wikipedia.org/wiki/Polonium:eek:
     
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  4. DDDenny
    Joined: Feb 6, 2015
    Posts: 22,580

    DDDenny
    Member
    from oregon

    Basically snake oil in Firestones' case!
     
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  5. leon bee
    Joined: Mar 15, 2017
    Posts: 1,310

    leon bee
    Member

    But still, Nuclear Sparkplugs!!
     
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  6. studebakerjoe
    Joined: Jul 7, 2015
    Posts: 1,187

    studebakerjoe
    Member

    What do you think they use to start nuclear reactors
     
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  7. Ratmother
    Joined: Jan 23, 2022
    Posts: 56

    Ratmother
    Member

    …maybe why they’re pink IMG_3655.jpeg
     
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  8. '29 Gizmo
    Joined: Nov 6, 2022
    Posts: 1,191

    '29 Gizmo
    Member
    from UK

    Like Uranium, its the isotopes that are the real nasty ones. More common firms of Polonium is not that bad.

    But as said. Aftermarket snake oil.
     
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  9. DDDenny
    Joined: Feb 6, 2015
    Posts: 22,580

    DDDenny
    Member
    from oregon

    I thought it was "Nucular":D
     
  10. jet996
    Joined: Jul 10, 2024
    Posts: 128

    jet996
    Member
    from WY

    Those are cool. I have a set of Lodge spark plugs that were in a dragster engine built in '57. They were pink and I believe they were polonium also.
     
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  11. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,491

    Ebbsspeed
    ALLIANCE MEMBER

    I bought a core Buick Straight Eight that had pink Lodge plugs in it. They all look good, and i think I'll run them in the rebuilt engine.

    20260102_221119.jpg 20260102_221155.jpg
     
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  12. I like the pushrod cover
    Ben
     
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  13. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,491

    Ebbsspeed
    ALLIANCE MEMBER

    Thanks Ben! I made a matching spark plug cover and the plan is to do an engine-turning pattern on them like I've done on the fuel pump block-off plate.

    20260103_094521.jpg 20260103_094531.jpg
     
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  14. leon bee
    Joined: Mar 15, 2017
    Posts: 1,310

    leon bee
    Member

    Where is that strait eight going?
     
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  15. Beanscoot
    Joined: May 14, 2008
    Posts: 3,682

    Beanscoot
    Member

    Might as well start a collection of all the elements touted in spark plugs. Let's see:
    Copper, Tungsten, Platinum, Polonium, Iridium, Ruthenium....

    Wow, there's more than I thought!

    upload_2026-1-3_10-8-1.png
     
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  16. Beanscoot
    Joined: May 14, 2008
    Posts: 3,682

    Beanscoot
    Member

    A bit of trivia, Marie Curie (discoverer of Radium fame, with husband Pierre) named Polonium in honour of her home country of Poland.
     
  17. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,554

    gimpyshotrods
    ALLIANCE MEMBER

    I believe that Alexander Litvinenko would disagree, had the Russians not used Polonium to ******inate him.
     
  18. GZ
    Joined: Jan 2, 2007
    Posts: 1,468

    GZ
    ALLIANCE MEMBER
    from Detroit

    Here are 13 NOS Firestone spark plugs advertised on ye olde HAMB Parts for Sale section! 20260103_170535.jpg
     
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  19. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,491

    Ebbsspeed
    ALLIANCE MEMBER

    I originally built it for my '37 Buick, but the original motor in it runs so good I really question whether I should do a swap, or maybe save it for a different build. Speedster? Hmmm...
     
  20. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,050

    Mr48chev
    ALLIANCE MEMBER

    Firestone had a whole line of things back in the early 70's and earler. That included some branded household appliances.
     
  21. AVater
    Joined: Dec 9, 2008
    Posts: 3,496

    AVater
    ALLIANCE MEMBER

    Saw these at Hershey fall 2024. This guy had quite a load of them. When I asked if he was concerned about radiation, he told me he received more standing around on that bright sunny day than he did from the plugs. IMG_3820.jpeg
     
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  22. Beanscoot
    Joined: May 14, 2008
    Posts: 3,682

    Beanscoot
    Member

    Slightly radioactive Thorium is added to TIG electrodes, I wonder why no one has thought to market spark plugs of dubious advantage on that premise.
     

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