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  • Has anyone noticed?

    Today as I was reinstalling the carburetors on the 2 cars I had over today I had a thought about something.

    Has anyone noticed that the gas pipe from the firewall to carburetor is longer(further from the firewall) than it needs to be to reach the carburetor?

    Well, awhile back I was reading something that mentioned that the Model A doesn't push from the rear axle because of the buggy spring, but pushed the car from the motor mounts. Now, this doesn't sound so far fetched because that is what happens, and thinking about that, Henry made the pipe longer so it could take the strain of the forward pressure on the engine and flex forward without breaking.

    So, next time you are screwing in the pipe at the carburetor, remember, it not only allows the fuel to run downhill, it also allows the flexibility of the forward movement of the engine to propel the car forward.

    J.C.
    You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!

  • #2
    Interesting. There has to be some explanation, perhaps lost over time, because the inside gas pipe is straight and runs parallel to the firewall where it would not be subject to thrust movement.

    Comment


    • #3
      Interesting observation!
      One i never heard mentioned before
      3 ~ Tudor's
      Henry Ford said
      "It's all nuts and bolts"


      Mitch's Auto Service ctr

      Comment


      • #4
        Well, now, I think you should measure just how much your engine moves. Then let us know.

        Comment


        • #5
          Wiz since you made this post i have been contemplating this situation.

          A. I am sure there is some degree of engine movement and then we have the front mount which gives some up and down bobbing movement

          B. I feel the movement horizontally (frt - bck) would be very minimal if any with the stock mounting system

          C. With FAM's i'm thinking the overall engine movement would increase

          D. We also have the steel wiper line that runs parallel with the fuel line

          E. The 28-29 has the conduit fastened that goes to the junction box

          F. Are there any other parts mounted from the frame or body going to the engine / trans with a direct connection?

          G. We also have the engine pans mounted between the engine and the frame (which are prone to breaking)

          H. Does anyone think Henry thought of this and decided that there is not enough overall flex to worry about?

          Z. Thanks for getting my brain in gear this morning,,, now i'm tired
          3 ~ Tudor's
          Henry Ford said
          "It's all nuts and bolts"


          Mitch's Auto Service ctr

          Comment


          • BILL WILLIAMSON
            BILL WILLIAMSON commented
            Editing a comment
            "Some" folks fear that FAMs will allow the engine will shift forward & the fan will do a NUMBER on the RADUMATOR!!!---hogwash!
            Bill Fams

        • #6
          I have not paid much more attention to the engine movement other than reading the afore mentioned article, but if you look at the vacuum line it too has the "S" bend in it for flex. Now I wonder why the engine pans are prone to breakage?
          You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!

          Comment


          • #7
            Wiz, can you link us to the article you read

            Comment


            • DaWizard
              DaWizard commented
              Editing a comment
              I will try to find it again.....bear with me

            • Mitch
              Mitch commented
              Editing a comment
              i am very interested in it also thanks

          • #8
            Engine pans break cuz the engine vibrates like a Walnut Shaker! I knew a Walnut Farmer with an Olds Engined Dragster, aptly named, "THE WALNUT SHAKER"--This was back in the '50s, when I LIVED on Drag Strips.
            Dad Leadfoot

            Comment


            • #9
              Well, sadly I am currently unable to find the article about the thrust of the drivetrain on the frame, but I have not given up looking. I know it is out there as I have read it!
              You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!

              Comment


              • #10
                Thinking back, in 62 Chev had an issue with poor motor mounts. They would stand not up to gas and oil. The rubber was so weakened the torque of the engine would actually pull the mechanical carb linkage forward raising the rpm's more than the driver wanted. Worst case the motor mount would break, engine went to full throttle, those muscle cars could really get your attention when you were least expecting it.
                Last edited by Ed H; 09-17-2017, 04:53 PM.

                Comment


                • Mitch
                  Mitch commented
                  Editing a comment
                  There you go Ed
                  I just had a 65 mustang in the shop with a straight 6 , auto. The l/s mount popped on me which caused the throttle to stick to the floor. Fortunately i was quick and turned off the key. my pants

              • #11
                Originally posted by Ed H View Post
                Thinking back, in 62 Chev had an issue with poor motor mounts. They would stand up to gas and oil. The rubber was so weakened the torque of the engine would actually pull the mechanical carb linkage forward raising the rpm's more than the driver wanted. Worst case the motor mount would break, engine went to full throttle, those muscle cars could really get your attention when you were least expecting it.
                Yep, I was working at the GM dealership when the motor mount recall came in, and I installed a lot of the safety cables around the motor mounts.
                This might also be a reason they changed from linkage to cables for the throttle.

                Comment


                • #12
                  I had the throttle stick wide open on my 1965 SS when I was pulling out of a parking lot. I was young yet and turned off the ignition switch. It was a little scary.

                  Comment


                  • #13
                    Originally posted by George Miller View Post
                    I had the throttle stick wide open on my 1965 SS when I was pulling out of a parking lot. I was young yet and turned off the ignition switch. It was a little scary.
                    George, did you make it to Gilmore?
                    I was hoping to meet you, but got to looking at parts and cars, and forgot to ask anyone if you were there.

                    Comment

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