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  • #76
    This whole thread is just inspiring, Jeremy. Fantastic work.

    Ed
    For just a little more, you can do it yourself!

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    • #77
      Yep, awesome.

      Cheers,
      Tush
      81 Alfa Romeo Spider Veloce, 81 Triumph TR8, 1973 Ford Capri
      73 Triumph TR6 CF4874UO, 68 Triumph TR250 CD5228LO
      62 Triumph TR4 CT6716LO, 60 Triumph TR3A TS69891LO
      60 Triumph TR3A TS64870LO, 59 Triumph TR3A TS44836LO
      https://www.youtube.com/user/cheftush

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      • #78
        it all looks great. The Webers look "BOSS" I'm gettin' itchy for some triple Webers myself.........
        1972 Sapphire TR6 #CC84,something

        1973 Harvest Yellow MGB V8

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        • #79
          that little pop of red on the cylinder head really comes through with everything assembled, looks great!
          Bill Connell
          1969 TR6 CC28790
          TR6 project log
          St. Paul MN

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          • #80
            Finally have this thing set where I want it (actually did this a couple weeks ago, just finally writing about it now).

            I had the carbs set where the car was running great. Acceleration was excellent, no flat spots. She really scoots. The one fly in the ointment was that it was running rich enough below 2500rpms to give me headaches after taking a drive. The AFR was reading 11-13 which verified both my nose and the feeling in my head post drive. This told me that I had my emulsion tube, main jet and air corrector likely correct, but my idle jet simply still too rich. I had tried another jet that I saw on my spreadsheet of comparable setups, but it was simply too lean after installation.

            Really wanting to get this resolved, I elected to call the tech line at Pierce Manifolds. They've been pretty helpful in the past. I explained my engine build, current setup and what I was seeing on the AFR. The tech guy commented that I had gotten everything right except the idle jet. He suggested a 50/F9. After handing over my CC info and waiting a few days, I had those jets in my hand.

            Changing jets in a Weber is literally a 2 minute job. Changing jets in 3 carbs is a 6 min job! I've done this enough now that I took a quick stab at setting the idle needles and got them right from the start.

            This setup is a big improvement over the previous. Same performance, no more headache. I cannot smell the exhaust when cruising around town at 40-45mph.

            I think the important thing to note here is not the specific jet that I used, but the process. Using my spreadsheet of builds got my 90% of the way there and my AFR verified what I was doing. Asking the tech guy at Pierce got me the final 10% and again the AFR verified my setup is now right.

            Details of this setup is below. BTW, the car now has 1200miles on the rebuilt engine.
            J.Chinn Rev4- Runs clean (13.8-14.7) while running at cruise
            Engine Cam .365 / 280
            Compression 9.75
            Exhaust Monza
            Headwork Yes
            Bore .040
            Carbs Type 18
            Float Level 7
            Aux Venturi 4.5
            Chokes 30
            Emulsion Tube F11
            Main Jet 125
            Air Corrector 175
            Idle Jet 50/F9
            Pump Jet 45
            Pump Bypass Bleed closed
            Pump Stroke 10mm
            Pump Spring Weak
            Needle Valve 175
            Trumpets 26
            Air Filters N/A

            1973 TR6 – BRG with beige interior, custom LED lighting
            Hardtop, OD, Rollbar, 15”Koenigs
            Bored, balanced and polished motor with PI cam, hi-comp head, triple DCOE's
            Header, custom exhaust, custom alternator, e-fan
            Lowered, poly suspension, Konis and rear anti roll-bar
            www.coventrysfinest.blogspot.com

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            • #81
              Glad you got your set up dialed in, Jeremy. Nice documentation!

              Cheers,

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

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              • #82
                Thanks Jeremy, gonna bookmark this one.
                1972 Sapphire TR6 #CC84,something

                1973 Harvest Yellow MGB V8

                Comment


                • #83
                  Originally posted by skootch13 View Post
                  Thanks Jeremy, gonna bookmark this one.
                  did I mention I have more than 1 set o webers. Get em while they’re hot
                  So much rust, so little time

                  64 TR4 Overdrive Surrey
                  67 GT6 Mk1
                  68 TR250 Soon to have Overdrive & Surrey
                  71 TR6 Hardtop Soon to have OD
                  81 TR8 Injected Automatic...the LAST Automatic

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