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Technical What's this supercharger part?

Discussion in 'Traditional Hot Rods' started by Fredb_, Feb 15, 2014.

  1. Fredb_
    Joined: Jun 24, 2013
    Posts: 38

    Fredb_
    Member

    Found this among some other vintage stuff. Thanks
     

    Attached Files:

  2. AG F/C
    Joined: Oct 20, 2009
    Posts: 361

    AG F/C
    Member

    I'ts a pressure switch. Probably connects the contacts at 3-5 lb boost pressure to operate an anti detonation injection (ADI) system like water or methanol or a fuel enrichment system...

    The little hose nipple connects to the manifold pressure below the blower.
     
  3. metlmunchr
    Joined: Jan 16, 2010
    Posts: 766

    metlmunchr
    Member

    Looks like one of those hokey pieces of junk peddled with claims it'll give you an extra ten mpg or allow your engine to run on water, or any of a number of other lies dreamed up to separate a fool from his money.
     
  4. Fredb_
    Joined: Jun 24, 2013
    Posts: 38

    Fredb_
    Member

    One of the contacts is labeled "Super Charger" the other is labeled "Ignition". I thought maybe it was a component related to racing setup or the obvious super charger. Fred
     

  5. AG F/C
    Joined: Oct 20, 2009
    Posts: 361

    AG F/C
    Member

    Might be an old Judson supercharger part. definitely a pressure switch of some type. Application is probably broad.
     
  6. Black Panther
    Joined: Jan 6, 2010
    Posts: 1,740

    Black Panther
    Member
    from SoCal

    Fred...I think that piece might be part of the electrical controls for a McCulloch supercharger..they have an electric solenoid that changes the blowers pulley diameter I believe....that makes the belt spin the unit faster...producing more boost.....
     
    Last edited: Feb 15, 2014
  7. el Scotto
    Joined: Mar 3, 2004
    Posts: 4,380

    el Scotto
    Member
    from Tracy, CA

    That switch is on the carb linkage.

    The piece in the original post was to kick on the auxiliary electric fuel pump to kick up the go juice pressure when the carb came under boost.
     
  8. Cool find for sure
     
  9. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,528

    Rusty O'Toole
    Member

    Looks like a McCulloch part. As le Scotto says, it kicks in the electric fuel pump for more go juice when the supercharger pressure builds up.
     
  10. Dominick Hide
    Joined: Dec 13, 2007
    Posts: 219

    Dominick Hide
    Member

    Definitely a McCulloch part. It is wired to the solenoid under the flying duck emblem on top of the supercharger. If an auxiliary electric booster pump is being used you can pig tail a wire to it. The switch is activated by vacuum not pressure, so must be connected to the intake below the carb.

    [​IMG]
     
  11. Fredb_
    Joined: Jun 24, 2013
    Posts: 38

    Fredb_
    Member

    Cool. Dominick, thanks for the pick. Do you know when these were in production?
    Fred
     
  12. nsh57
    Joined: Mar 14, 2004
    Posts: 263

    nsh57
    Member

    Dominick is right...Definately McCulloch, Want to sell it? PM me!
     
  13. Fredb_
    Joined: Jun 24, 2013
    Posts: 38

    Fredb_
    Member

    PM sent, thanks!
     

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