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Triple Stromberg and GP exhaust manifold install

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  • #16
    Hold the phone. Phil J sent me a picture of his linkage off of the carbs and it is bent. Here's how to do it.

    Put it in a vise and then lift up on the other end. Easy Peasy. Do the other side too.

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    You end up with this. See the hole on the right and how it is bent? I gave myself a Doh! slap to the head.

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    ON the manifold.


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    Last edited by skootch13; 03-10-2019, 09:24 PM.
    1972 Sapphire TR6 #CC84,something

    1959 Red TR3 (Wife's)

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    • #17
      I got the carbs on and felt real good about the alignment. But I have a soft zee clip mating two of the throttle shafts. After a few cycles of pushing on the center throttle to see how well they worked, all of a sudden they started binding and slipping. I did not correctly read the advise above from Brit in Bama. I thought he meant the solid couplers, not the Goodparts "zee clips." Oops. GoodParts Zee clips are on order.

      In the meantime I looked at why the throttles weren't opening all the way. The choke adjusting screw is hitting the hose clamp on the rear hose.

      Click image for larger version

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      1972 Sapphire TR6 #CC84,something

      1959 Red TR3 (Wife's)

      Comment


      • #18
        I'm a bit surprised that RG's manifolds won't just fall into place of their own accord. Apart from his past disparagement of Weber DCOEs I have a healthy respect for his offerings.

        FWIW, I had zero fit issues between his exhaust manifold and Cannon Weber manifold, nor with the factory throttle linkage ( which will get you as far as the bell crank ). Good header; just wish he could make it in stainless.

        Tom

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        • #19
          The center carb gets to WOT. I'm struggling to get the front and rear carb to WOT. The throttle levers are both about 1/8-3/16" from the throttle lever stop. Anyone have any tips for getting these throttle shafts in line with each other? They look dead on but must be off since the three throttles don't open all the way

          1972 Sapphire TR6 #CC84,something

          1959 Red TR3 (Wife's)

          Comment


          • #20
            Good Lord, this project. Like others I'm having a hell of a time getting a stable idle. I set the idle at 900 rpms. When I blip the throttle the idle returns to 500 rpms. Blip it again and it goes to 1300rpms/ Blip again, 1800 rpms. I've fiddled with the carbs and linkage more than anyone can imagine. Today a buddy stopped by and had a look. After 45 minutes he was convinced I have a vacuum leak. I spray carb cleaner all over. And on the rear carb intake manifold, it appears. The car stumbles when I spray the gasket area of the rear carb. Crap. All nuts are tight.

            Now what?

            Double gasket and sealer on them?
            1972 Sapphire TR6 #CC84,something

            1959 Red TR3 (Wife's)

            Comment


            • #21
              Let's call this done, finally. I had to go back to square one because of the vacuum leak. I put on two gaskets this time and really tightened the nuts. Once again a straight edge was used across the top of the intakes to make sure they were aligned properly. Even with that, I was getting some binding with the throttle shafts. After this saga, I called in back up and had a TR6 owner with three cars with triple carbs come over today to see what he could do. 45 minutes of laying hands on the linkages and voila. No binding. The carbs are balanced. All is good.

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              Putting the exhaust on is next. And good news, the stainless Falcon exhaust is the right diameter of the GP adaptor.
              1972 Sapphire TR6 #CC84,something

              1959 Red TR3 (Wife's)

              Comment


              • SapphireBlue72
                SapphireBlue72 commented
                Editing a comment
                It looks very nice. Glad that you got it working. Soon, the reward.

            • #22
              I want to update this for anyone else who does this triple carb project in the future because I found a problem not mentioned in any other thread.

              Of course when i went for a test drive, the rpms at idle went up to the 1500-1800 rpm range. I do not know why I had no problem when it was sitting in the garage. I did lots of testing of the couplers again by coupling and uncoupling the throttle shafts of each carb, I got the carbs settled down and balanced with a idle of 900 rpms or so. Then I would blip the throttle and right back to 1800 rpms. I shot carb cleaner everywhere looking for another vac leak. No leak. I was out of ideas.

              Todd and I talked about what was happening. He did a search for "high rpm at idle" or something and found a thread about it. One thing mentioned in the thread was the throttle bypass valves were not working properly. So, since i rebuilt the middle carb I took that TBV off and screwed the adjusting screw all the way closed. I thought I had done that when I put it together, but I guess not. I put it back on the carb and started the car. Bingo. Instantly no more high rpms. For 30 minutes last night I idled and blipped he throttle. The idle returned to normal every time and never went to 1800 rpms. I went for a 25 mile drive today and it never had a high idle during that time.

              The journey is a learning process, people.
              1972 Sapphire TR6 #CC84,something

              1959 Red TR3 (Wife's)

              Comment


              • #23
                Looking good Aaron, Now go out and put some miles on that puppy. Don't forget to check the torque on those manifold studs after a few hundred miles...but then I'm sure you knew that.

                Cheers,

                Kevin
                76 TR6 CF58170UO (The Lady)
                72 TR6 CC80068UO (The Slut)
                68 TR250 CD4893L (retirement project)

                Comment


                • skootch13
                  skootch13 commented
                  Editing a comment
                  Thanks, Kevin. And I know nothing. I just read forums and talk to people and glom my way forward.

              • #24
                Nicely done Aaron!
                1961 TR4 1966 TR4A
                1968 TR250 1975 TR6
                1979 Spitfire 1500

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                • #25
                  There have been many posts in the past covering this problem and it plagues every triple carb installation until you get the alignment just right, both HOT and COLD for your particular install. I did one of the first Ratco cable installs on mine to eliminate the WOT and linkage clearance issues with the modified and self binding original linkage. It's all on my site www.74tr6.com

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                  • #26
                    You can also get a triple choke cable setup from Richard Good and it works really well. Very fast warm up using that.

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                    • #27
                      Originally posted by brosky View Post
                      There have been many posts in the past covering this problem and it plagues every triple carb installation until you get the alignment just right, both HOT and COLD for your particular install. I did one of the first Ratco cable installs on mine to eliminate the WOT and linkage clearance issues with the modified and self binding original linkage. It's all on my site www.74tr6.com
                      Hi Brosky, I read your blog about 25 times and looked closely at the pictures as I ran into problems. There is a RATCO linkage sitting on the shelf right now waiting for me to install it. While there is no binding of the throttles when the vertical link is detached, there is the occasional and slightest binding when it is. Nothing much. Every now and again I will come to a stop sign and the idle will be 1200- 1300 rpms. Nothing like the 1500-2000 rpm that I had before.

                      I drove the car 150 miles or so on Easter. The weather was perfect here and I was having a ball. You always read and hear that a header gives an instant 10%+ increase in power. Yes, it does. To my ear and seat, it feels like the car builds revs quicker too.

                      There is one odd thing that I will report. Maybe five times while accelerating through 2300-2500 rpms, the car had a reduction in power for an instant. An eye blink. NOt like the ignition system cut out where a car feels like it falls on its face. Just a reduced push into your back and then by the time I'd glance at the tach, it was over. I'm not going to fight that one right now either.

                      Last thing is I want to thank all of you who helped, either by message, phone, blog or forum post. I couldn't have done it without all of the help from 6-Pack.
                      1972 Sapphire TR6 #CC84,something

                      1959 Red TR3 (Wife's)

                      Comment

                      Triple Stromberg and GP exhaust manifold install

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