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Featured Projects Seagrave 531 V12 Special BuiLd Up in Brazil

Discussion in 'Traditional Hot Rods' started by Drmalacarne, Sep 5, 2019.

  1. Rickybop
    Joined: May 23, 2008
    Posts: 5,697

    Rickybop
    Member
    from Michigan

    Holy cow... I never were there more spark plug wires on one engine! LOL

    Sent from my VS835 using The H.A.M.B. mobile app
     
  2. ss34coupe
    Joined: May 13, 2007
    Posts: 4,038

    ss34coupe
    Member

    An unusual and challenging build. Will be following your progress with interest. Go for it!
     
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  3. 2 distributers-24 wires,is it a delay fire for each cylinder?
    Then I noticed 2 plugs per cylinder.:rolleyes:
     
    Last edited: Sep 5, 2019
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  4. Frankie47
    Joined: Dec 20, 2008
    Posts: 1,705

    Frankie47
    Member
    from omaha ne.

    I bet a competent 3D printer person could replicate those caps and rotors.
     
  5. Boneyard51
    Joined: Dec 10, 2017
    Posts: 2,703

    Boneyard51
    Member

    The reason for two ignition systems on the Seagraves was for dependability. They usually powered Fire engines, and the theory was that if one system crapped out the other would get you to the fire. Mack engines also had dual ignition systems.
    Most of the time there is a switch that lets you chose one system or the other system or both systems. That way you can test both systems.
    The engine at idle will usually pick up a few rpms when both systems are activated.




    Bones
     
  6. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

    One system for spare. Seagrave recommendation was to use one system at a time.


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  7. tubman
    Joined: May 16, 2007
    Posts: 4,373

    tubman
    ALLIANCE MEMBER

    I would like to see this done. If it works, it opens up a whole new horizon for things like this. Do you have any idea of how they would handle the embedded metal parts in the cap?
     
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  8. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

    We open the Little Beast.
    A lot of good surprises, se good cylinders walls an camshaft and some bad news, like the main and crankshaft bearings.


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  9. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

  10. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

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  11. Boneyard51
    Joined: Dec 10, 2017
    Posts: 2,703

    Boneyard51
    Member

    Can you still get head gaskets for the V-12? I know the head gaskets for the straight six are not available any more. I have one left in my hoard of parts.

    Do you have new bearings for the engine?



    Bones
     
  12. Just an observation, the distributor make being Delco,
    you might luck out and it would be same as Cadillac V12.
    Great thread!! Good luck!!
     
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  13. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

    We refurbished the heads gaskets with Loctite Cooper Spray.
    And we made a brand new set of bearings.



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  14. What a wealth of information,thanks to all.I googled a video of a v12 running.
     
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  15. Speed~On
    Joined: Apr 28, 2011
    Posts: 1,159

    Speed~On
    Member

    That's a great looking engine. If it was in an Engine (pumper) it probably has more hours running the pump than driving miles. Your project is awesome!
     
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  16. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

    More disassembling.
    The V12 has one lower main block and 2 upper semi blocks.
    Ultra high quality manufacturing.
    This engine was primarily designed by Pierce Arrow for 1932 V12 models.
    And later Seagrave commissioned for a version for its Pumper Trucks with duplicated ignition.
    IMG_0213.JPG IMG_0211.JPG IMG_0214.JPG IMG_0215.JPG IMG_0216.JPG


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  17. 62rebel
    Joined: Sep 1, 2008
    Posts: 2,480

    62rebel
    Member

    They can be made up from brass stock, machined and threaded to assemble into the cap. My old BMW had a cap with replaceable inserts in it. Lucas stuff may be similar.
     
  18. 62rebel
    Joined: Sep 1, 2008
    Posts: 2,480

    62rebel
    Member

    If I had one of those engines I would probably do exactly what you're doing with it!
     
  19. Boneyard51
    Joined: Dec 10, 2017
    Posts: 2,703

    Boneyard51
    Member

    You made a new set of bearings!!! Now that’s impressive!





    Bones
     
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  20. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

    How rare is this engines in USA actually?


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  21. Boneyard51
    Joined: Dec 10, 2017
    Posts: 2,703

    Boneyard51
    Member

    I would say quite rare, but there are some out there. They were common in fire trucks years ago, but like a lot of things most of them were junked out.






    Bones
     
  22. tubman
    Joined: May 16, 2007
    Posts: 4,373

    tubman
    ALLIANCE MEMBER

    I don't think they are that rare. When I had my Seagrave, I knew where three others were within 50 miles of me. If you get in with the antique fire truck guys (SPAAMFA), things start to pop up.

    I imagine everyone interested in these knows that they were originally developed by Pierce-Arrow for use in their luxury cars. When Pierce went down, Seagrave bought the rights to the engine and began making them, which adds a certain amount of panache' to them. Mine was a '48 and had 468 ci, the same as the Pierce version. Mine did not have "Seagrave" cast into the heads, but had the letters "PA" surrounded by a hexagon cast in one corner of the head.. I think yours is a later version than mine.
     
    Last edited: Sep 7, 2019
  23. shivasdad
    Joined: May 27, 2007
    Posts: 519

    shivasdad
    ALLIANCE MEMBER
    from Texas

    Subscribed. Love the oversize special type cars. That engine is a monster.
     
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  24. Fordors
    Joined: Sep 22, 2016
    Posts: 2,154

    Fordors
    Member

    Did they use one distributor and one magneto on emergency equipment? That would be a safe guard, if the generator went out and the battery was going dead you could switch to the magneto and keep the pump going.
     
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  25. Drmalacarne
    Joined: Sep 3, 2019
    Posts: 135

    Drmalacarne

    After cleaning and inspection rods, crank we assembled with brand new bearings.
    a339182e-d78b-4730-8597-5116b240d56f.jpg dc2c7d16-335d-4ed2-84a3-1a79bdeb4a4c.jpg 44abba5f-ec37-44ae-9a85-d500a4f42013.jpg bd6fbd6e-bda7-45df-8891-cefa34d4afb5.jpg ec6623a9-bd90-407f-9191-9455a43aac4d.jpg bfd5dd9e-9710-485c-9ee3-70312b777986.jpg 9ce789f7-649d-45cd-9c12-6f49baa9c19f.jpg


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  26. 51504bat
    Joined: May 22, 2010
    Posts: 1,185

    51504bat
    ALLIANCE MEMBER

  27. Great engine and a nice frame to put it in. Subscribed
     
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  28. Enjoying your updates, great work and some impressive cars in the background..:)
     
  29. Boneyard51
    Joined: Dec 10, 2017
    Posts: 2,703

    Boneyard51
    Member

    Back in the day, they did many things to ensure the fire engines made it to the fire. I would imagine some manufacturer had a mag and a distributor. All of ours had two distributors. No mags. Fire trucks back in the day had a lot of “ back up” systems.




    Bones
     
  30. Nailhead A-V8
    Joined: Jun 11, 2012
    Posts: 824

    Nailhead A-V8
    Member

    love this plan...hope you keep the buick cowl maybe you can find one of these cool '50's seagrave hoods with the horn/bullet thing it might make a cool rear deck for a speedster body...[​IMG]
     

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