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  • Engine: Carburetor Automatic Choke Heat Tube

    On a '56 4V intake manifold. Is the tube that the automatic choke attaches to, that extends into the exhaust cross over, suppose to be open on the end in the cross over?

  • #2
    I think it should be a loop; opened to air on both ends, but closed to internal gasses?
    Exposure to exhaust gasses will foul the inside of the choke unit/

    Comment


    • #3
      Yes, air is drawn in through the open tube end, down the loop into the cross over back to the choke housing heating the coil and sucked into the carb through a port inside the choke housing.

      Comment


      • #4
        Actually on the older WCFB manifolds there is no "loop" And the choke heat stove is of course closed. The pipe from the choke is open on the end, and sits down into this closed "well". There should be a nipple or "branch" brazed to the heat stove. A rubber line connects to this nipple, and to the airhorn of the carburetor.
        Bez Auto Alchemy
        573-318-8948
        http://bezautoalchemy.com


        "Don't believe every internet quote" Abe Lincoln

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        • #5
          Well, what I have on my intake is a short tube that extends into the exhaust cross over passage. There is no loop, and the end of the tube appears to have some sort of plug in it...it's not carbon, its metal. Is this tube suppose to be plugged or open?

          Comment


          • #6
            Originally posted by 345 DeSoto View Post
            Well, what I have on my intake is a short tube that extends into the exhaust cross over passage. There is no loop, and the end of the tube appears to have some sort of plug in it...it's not carbon, its metal. Is this tube suppose to be plugged or open?
            So IF this tube is in addition to the one with the Compression Nut to screw onto the Choke Housing, then it is the one Bez mentions that should be OPEN and have a hose to that tube coming out of the side of the Carb. Top.

            It is sometimes very hard to explain what should be on these 50+ Year old Cars without seeing them because Studebaker owners are famous for swapping different years of parts around just because they can and they all fit!

            Hence Post #3 being about a different Year Manifold.
            StudeRich
            Second Generation Stude Driver,
            Proud '54 Starliner Owner

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            • #7
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              These pictures might help explain...

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              • #8
                The tube in the manifold is the one that should be plugged in the end. The one that screws to the choke is the open one that slides inside the manifold tube.
                It's fine just the way it is is how it was designed.
                Last edited by bezhawk; 04-29-2016, 07:16 PM.
                Bez Auto Alchemy
                573-318-8948
                http://bezautoalchemy.com


                "Don't believe every internet quote" Abe Lincoln

                Comment


                • #9
                  If that Exhaust Port tube that goes inside of the Head is plugged as it should be to only let Heat in, not Exhaust, then everything is fine just put it together, it is self explanatory.

                  You do need the piece of Hose that goes to the Carb. Air Horn that I mentioned in Post #6 however.
                  The higher Temp hose the better.
                  StudeRich
                  Second Generation Stude Driver,
                  Proud '54 Starliner Owner

                  Comment


                  • #10
                    Thanks, again, guys...

                    Comment


                    • #11
                      Hmm... I have a carb with an electric choke, The manifold I have had that tube bent and broken. Since I have the electric choke, I removed the tube, tapped and plugged the hole. Is that going to be problem?
                      bob hapner

                      Comment


                      • #12
                        You are fine Bob, Electric Chokes do not rely on heat.
                        StudeRich
                        Second Generation Stude Driver,
                        Proud '54 Starliner Owner

                        Comment


                        • #13
                          Originally posted by StudeRich View Post
                          You are fine Bob, Electric Chokes do not rely on heat.
                          Well.....technically, there is an electric heater in the choke ....hence the name "electric choke"
                          Bez Auto Alchemy
                          573-318-8948
                          http://bezautoalchemy.com


                          "Don't believe every internet quote" Abe Lincoln

                          Comment


                          • #14
                            How well does the electric choke work on the WCFB's...as opposed to the Stock heat tube system?

                            Comment


                            • #15
                              I would recommend not fixing what ain't broken. The stock set-up worked fine for millions of people for more than a quarter of a century. The WCFB choke system is as good as any carburetor choke. The main reason you would want to change to n electric choke would be if you blocked off the heat passages to keep from vapor locking.
                              Bez Auto Alchemy
                              573-318-8948
                              http://bezautoalchemy.com


                              "Don't believe every internet quote" Abe Lincoln

                              Comment

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