Dual 1bbls on a Stovebolt!

Discussion in 'Hamilton Fuel Injection' started by Bill USN-1, Dec 16, 2013.


  1. Bill USN-1

    Bill USN-1 Moderator Staff Member Moderator

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    Got a request to do a complete TBI kit using a dual 1bbl throttle body setup for a 261 stovebolt in a 57 Chevy.
    I think it came out pretty well.;)

    Distributor conversion

    [​IMG]

    The TBI layout.

    [​IMG]

    [​IMG]

    The original carb setup.

    [​IMG]

    Now with dual throttle bodies.

    [​IMG]

    Air cleaner base

    [​IMG]

    And all done

    [​IMG]


    The classic 57 is now a turn key daily driver his wife can take to the store.
     
  2. jeff campbell

    jeff campbell Lives in an IH Dealership

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    KOOL deal, nice job bill, prolly runs better than ever ! jeff
     
  3. BO185

    BO185 Y-Block King

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    Nice I always wanted to TBI my GM 235 six in my 55 chevy but never got around to it.

    If you would please tell the customer to join www.trifive.com and post details of the swap. I am a member there under same name.


    And Bill you have detail on the swap?
     
    Last edited: Dec 16, 2013
  4. Bill USN-1

    Bill USN-1 Moderator Staff Member Moderator

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    It was a complete kit I put together for him.
    He had to adapt his dual carb throttle linkage to run the throttle bodies and he made the air cleaner and installed the hard lines for the fuel.

    Haven't heard from him in a while but said he was going to do his buddies pickup next.
    He did a nice job on the air cleaner.
     
  5. eagleuh1

    eagleuh1 Farmall Cub

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    Nice setup. What throttle bodies are those? What vehicle are they used on? Looks very nice. Is the fuel distribution better using 2 ones over a 2 barrel TBI on the stovebolt? Thanks. Jim
     
  6. eagleuh1

    eagleuh1 Farmall Cub

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    By the way, BO185, just noticed your a fellow Arkansan. And thanks for your service. Unless your just over there on vacation. :). Jim
     
  7. BO185

    BO185 Y-Block King

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    Check out the Midsouth Binders page in the group section on here. Several from AR here.

    This is my full time job, as I am a Contractor, not in uniform. :D
     
  8. Bill USN-1

    Bill USN-1 Moderator Staff Member Moderator

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    The new adapters are designed to use the 2.5/3.1 throttle body.
    With the long inline engines the center cylinders tend to run a little richer then the outers. So by having 2, the distance from each one is more evenly spaced to the cylinders.
     
  9. eagleuh1

    eagleuh1 Farmall Cub

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    Could the ECM run 3 1 barrels? Visions are dancing in my head now. :)
     
  10. Bill USN-1

    Bill USN-1 Moderator Staff Member Moderator

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    Yes and no.
    The ecm is designed to run 1 injector per injector driver based on the electrical load.
    Some guys have connected another injector in parallel and had it work.
    Others have modified the injector driver in the ECM to allow it to carry the additional load.
    There's down sides to both options.
    One you shorten the life of the ECM and two you now have a modified ECM so if it ever fails you can't just buy a replacement at the local store or junkyard and drop it in.

    So you have to decide which you want more.
    3 throttle bodies vice 2 or ease of maintenance if it's needed.

    I originally chose the GM system because of it's availability should I need a part.
    I could have went with one of the aftermarket EFI systems or build it with a megasquirt kit.
    But if they failed I'm stuck till the new parts arrive.
     

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