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Technical 4 X 2 Flathead intake manifold

Discussion in 'Traditional Hot Rods' started by ocsid, Sep 6, 2015.

  1. RichFox
    Joined: Dec 3, 2006
    Posts: 10,020

    RichFox
    Member Emeritus

    I had a 320 cid GMC six cylinder on which I ran 3 Holley 500cfm two barrels. In a full IR set up. I expected that the very weak signal would cause the power valves to be always open. So I plugged the power valves. No worry about them. My experience after that was that the carb is not seeing a large air flow or va***e signal, so it is not dumping much fuel. But all the air in the world is flowing in there. So I needed to jet it pretty rich. It started and ran pretty good. My only real concern was WOT operation. But it didn't dump lots of fuel and I didn't expect it to.
     
  2. Flatheadjohn47
    Joined: Aug 18, 2012
    Posts: 1,396

    Flatheadjohn47
    Member
    from Lewes, DE

    Years ago a friend of mine "Homebuilt" a bunch of flathead tunnel Rams.The 2 he built mounted 4 individual 2 barrels sideways so each throat of the carb fed an individual port of the intake.Looks good on paper,but is untested image.jpg image.jpg
     
    kidcampbell71 likes this.
  3. 322century
    Joined: Oct 28, 2007
    Posts: 72

    322century
    Member
    from Europe

    For my 304 ci ...
     

    Attached Files:

  4. Pappys31
    Joined: Jan 30, 2020
    Posts: 12

    Pappys31

    My dad built his with an Edelbrock 4 stack and a blow thru McCullough supercharger IMG00183-20100620-1723.jpeg

    Sent from my SM-G960U using The H.A.M.B. mobile app
     

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