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Thumbwheel Timing Adjuster

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  • Thumbwheel Timing Adjuster

    We still have snow on the ground here on the prairie, so I'm finding little jobs to do in anticipation of better weather.

    I like the idea of easy timing tweaks.

    http://bullfire.net/TR6/TR6-11/TR6-11.html#Update

    Ed

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

  • #2
    Thanks to this post I just discovered your site, Ed. It is astonishing! What a resource it will be for me as I get to know my just-purchased TR6.

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    • #3
      I get such pleasure reading through all the carefully engineered steps that have gone into restoring this car. Every little detail done to perfection. Thank you for sharing your knowledge with us. Would make quite a book when you are finally done. Me, I'm just a Bodger....

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      • #4
        Amazing work as always. Thank you.

        One of the things that amazes me is you find the obscure parts. Where on Earth did you find the drive gear for the distributor?
        1972 Sapphire TR6 #CC84,something

        1959 Red TR3 (Wife's)

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        • #5
          Nice upgrade Ed! I was wishing I had a thumbweel to fine-tune timing after my own engine upgrade last year. This cam seems very sensitive to timing changes. Having this will made setting it much easier.

          Can you provide a link to the Jag site please? Think I'll follow your example and put them on my distributors.
          Keith, Huntsville AL, 1971 CC66559U
          10.0:1 CR gasflowed head | Weber DCOEs | CP "150hp" Cam | Distibutor by Advanced | Lightened flywheel | Phoenix SS Exhaust System | HVDA 5-Speed | Good Parts suspension and anti-roll bars | Konig Rewinds | Boyd 15 gal tank | Miata Seats and Mr Mikes covers | Carl Visser dash | Mohair hood | Gas-strut bonnet and boot lift kits

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          • #6
            I've had the vernier adjustments on my '250s for years, as they have 7 degree distributors which came with them. Oddly, they are fitted at the other end from how Ed's is, as are the AR and 22D markings on the casting. In my case, I find the engines are not particularly sensitive to timing adjustments; apart from the pinging threshold I'd say hardly. It is a factor for fuel economy though ( the more advance the better ).

            Not everyone knows the vacuum pod fitted to the AR end can be rotated in 1/2 turn increments to effect static timing adjustments of 2 degrees. This is where the vernier nut is placed on mine, and where the vacuum retard pod is on 41202Bs.

            My pics seem to be too large to load.

            Tom

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            • #7
              Thanks, Guys. I appreciate hearing that folks enjoy the site or find it useful.

              Skootch--The distributor drive gear was original. It was the gear's retaining pin that I swapped for a better type.


              Keith-- The adjuster was from: XKS UNLIMITED, www.xks.com

              It must be a Moss company because it looked like the billing went through Moss Motors.

              Part number JLU 54413770 "Adjuster Blank"

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

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              • #8
                Tom-- I expect the TR250 distributor is similar to the GT6. They are the mirror image of my TR6 unit because mine had only vacuum retard, and the GT6 (and I assume the 250) had vacuum advance.

                Ed

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

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                • #9
                  Originally posted by ed_h View Post
                  : XKS UNLIMITED, www.xks.com

                  It must be a Moss company because it looked like the billing went through Moss Motors.

                  Ed
                  Yes - Moss bought them a couple of years ago. (I forgot about that, but all my Jags are gone)
                  '74 TR6 CF13007U aka "Mr. T"
                  Custom Blue (Delft-Like) and New Tan (Formerly Mallard and New Tan)
                  Points, Ballast Bypassed, Bosch Blue Coil, Moss Cobalt Wires, Champion RN12YC plugs.
                  Peaks and tweaks, but the spirit of Original
                  Redlines always.
                  My wife is the Driver, I'm just the Mechanic....

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                  • #10
                    I found that the little detent spring is unobtanium, even from Jeff Schlemer. To replace a lost one, I had to buy a junk dist.
                    Berry

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                    Thumbwheel Timing Adjuster

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