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HELP! Twin Engine Coupling

Discussion in 'The Hokey Ass Message Board' started by Speedticket13, Jul 10, 2012.

  1. Speedticket13
    Joined: Dec 20, 2009
    Posts: 11

    Speedticket13
    Member
    from Massillon

    Looking to connect two injected small block chevys via/ two sprockets and a double chain. Does anyone out there know what size chain and sprockets are stong enough? Pictures would be a great help.Thank You!
     
  2. Atwater Mike
    Joined: May 31, 2002
    Posts: 10,598

    Atwater Mike
    ALLIANCE MEMBER

    I think the number was 80...Be sure to cut an extra woodruff keyway 180 degrees from the original at the crank snout of the rear engine. One is not enough.

    Pictures are archived in Street Rodder magazine, look up Tom McMullen's "Chevy Two" project, it was an Anglia or Thames with 2 Chevys. Street driven...

    Big Willie looked underneath at a street race one night, and exclaimed: "This mutha's got TWO oil pans!"
     
  3. Speedticket13
    Joined: Dec 20, 2009
    Posts: 11

    Speedticket13
    Member
    from Massillon

    Thanks for the quick reply, No ideas on sprocket size O.D.?
     
  4. F&J
    Joined: Apr 5, 2007
    Posts: 13,223

    F&J
    Member

    Do a google on "chain coupler", maybe on a site like Boston Gear, ..or Morse Chain might be better.

    I'd be thinking that the diameter changes with the sprocket bore sizes, but not sure.

    Anyways, it is called a chain coupler, so you should be able to find a chart with listings by chain number size.
     

  5. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 5,492

    Ebbsspeed
    ALLIANCE MEMBER

    How are you wanting to position the engines? Side by side, or one in front of the other?
     
  6. Speedticket13
    Joined: Dec 20, 2009
    Posts: 11

    Speedticket13
    Member
    from Massillon

    one in front of the other. inline twin front engine dragster...
     
  7. enjenjo
    Joined: Mar 2, 2001
    Posts: 2,536

    enjenjo
    Member
    from swanton oh

    It doesn't really matter as long as both sprockets are the same size. It works best to have sprockets bigger than the flywheel bolt pattern, so you can drill one sprocket to bolt on the rear of the crank.
     
  8. cmyhtrod
    Joined: Nov 29, 2008
    Posts: 360

    cmyhtrod
    Member
    from ct

    Sprocket diameter shouldn't be an issue, the bores on the sprockets are tapered to accept a hub, which is available in different sizes depending on the shaft diameter. I don't know if the hubs available for two woodruff keys, so some machine shop time may be required.
     
  9. Speedticket13
    Joined: Dec 20, 2009
    Posts: 11

    Speedticket13
    Member
    from Massillon

    So basicaly a sprocket bigger then the flywheel bolt pattern, and 80 chain, and cut an extra keyway in the rear motors crank snout.
     
  10. 296moon
    Joined: Oct 24, 2007
    Posts: 663

    296moon
    Member
    from england

    Although I havent run my twin eng project yet I hope that its going to work like this [​IMG] [​IMG]
     
  11. Speedticket13
    Joined: Dec 20, 2009
    Posts: 11

    Speedticket13
    Member
    from Massillon

    I like that idea but this is a restoration of a dragster, were trying to keep it as original as possible.
     
  12. 296moon
    Joined: Oct 24, 2007
    Posts: 663

    296moon
    Member
    from england

    Just trying to help... dident know this was a recycle thing
     

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