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DIY vernier pulleys

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  • DIY vernier pulleys

    So after doing a bit of reading on cams, it seems that timing them in accurately is key to making them perform. Thing is, the cheapest vernier pulleys for the K series are about £140.

    There seems to be enough meat on the standard pulleys to try something like this, does anyone know of it being tried?
    Originally posted by apbellamy
    Fuck me Shaun. That actually made sense.

  • #2
    What about offset keys ?
    Watsons frame in a standard length front, they said it was impossible ...

    Build Thread - standard length round nose B series with Watsons frame, it is possible

    Comment


    • #3
      Offset dowels, simples!
      Originally posted by Burnard
      couldnt be bothered to stretch that far to pull it out.
      Originally posted by ardonfast
      Haz obviously don't like custard , my Mrs spits it out to!
      I love it

      Comment


      • #4
        I know you can get them, but don't you have to get them made up to the specific offset that you need? You can't just buy them like the range you can get for an A series, or can you?
        Originally posted by apbellamy
        Fuck me Shaun. That actually made sense.

        Comment


        • #5
          No, you'd have to figure out what degree you want or have a selection made.
          Originally posted by Burnard
          couldnt be bothered to stretch that far to pull it out.
          Originally posted by ardonfast
          Haz obviously don't like custard , my Mrs spits it out to!
          I love it

          Comment


          • #6
            Hmmm. That'd work if you could afford to have the engine apart long enough to work out exactly what offset you need.

            Got any thoughts on making the standard ones adjustable? The prototypes in that thread look a bit ropey, but the lasercut ones look workable.
            Originally posted by apbellamy
            Fuck me Shaun. That actually made sense.

            Comment


            • #7
              Didn't Matt or Gaz have some made recently
              Watsons frame in a standard length front, they said it was impossible ...

              Build Thread - standard length round nose B series with Watsons frame, it is possible

              Comment


              • #8
                http://www.16vminiclub.com/forums/sh...ad.php?t=32106
                "yuck ,more like a 3 r2"
                http://www.youtube.com/watch?feature...&v=tb261HwQNDQ
                SAY WHAT YOU BELEVE,,BELEVE WHAT YOU LIKE,
                http://www.youtube.com/watch?feature...&v=3JhaTwP7uuk

                Comment


                • #9
                  Thats the one
                  Watsons frame in a standard length front, they said it was impossible ...

                  Build Thread - standard length round nose B series with Watsons frame, it is possible

                  Comment


                  • #10
                    ive got something like that on my kv6. works well for me.

                    Drew

                    Comment


                    • #11
                      Originally posted by Roverdose View Post
                      ive got something like that on my kv6. works well for me.

                      Drew
                      The offset keys, or adjustable cam pulleys?
                      Originally posted by apbellamy
                      Fuck me Shaun. That actually made sense.

                      Comment


                      • #12
                        By the time you've fucked around either drawing up CAD files and getting them laser cut and paid for materials or messed around with a drill, angle grinder and hacksaw, swearing because something is a mil out (then you have to make another matching one), you'll wish you'd have just spent the £140.
                        Suck, Squeeze, Bang, Blow.

                        Comment


                        • #13
                          And they would be made out of aircraft alloy, anodised and look very pretty.

                          Comment


                          • #14
                            i made the keyway in two old pulleys twice as wide as they should be, and tried many combinations swinging both cams 2 degrees at a time till i was happy, the friction of the bolts is plenty to hold em tight if torqued to spec. once i found a happy place i'd then modify another set of pulleys so they doweled in that location. tedious, but cheap nowadays i value my time to much so would just buy very-near pulleys.
                            [email protected] :)

                            Denis.

                            Comment


                            • #15
                              Originally posted by evolotion View Post
                              i made the keyway in two old pulleys twice as wide as they should be, and tried many combinations swinging both cams 2 degrees at a time till i was happy, the friction of the bolts is plenty to hold em tight if torqued to spec. once i found a happy place i'd then modify another set of pulleys so they doweled in that location. tedious, but cheap nowadays i value my time to much so would just buy very-near pulleys.
                              I've heard about this method, and glad to hear you used it successfully Couple of questions though:

                              How many degrees adjustment did they give when opened out?
                              How did you re-dowel them permanently?
                              Have you got any pics?
                              Originally posted by apbellamy
                              Fuck me Shaun. That actually made sense.

                              Comment

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