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  • Per Mark BEX ....

    Quick ride in a ZTR 3 wheeler.

    Terrifying, these guys are clueless on steering and suspension geometry, had reverse ackermann, positive camber gain in bump, and wild bump steer.

    Got into some serious tank slappers in the middle of traffic, where even smaller cars looked like trucks next to you.


    https://www.youtube.com/shorts/R_46gJu4aWo
    Jim
    '06 SunnyBrook Titan 34BWKS
    '07 Freightliner Sportchassis
    '11 Chevy Silverado 1500
    '16 Camaro RS

    Comment


    • Per Mark BEX ....

      I wandered around the ZTR factory.

      I was expecting more, and I don't mean the factory, but their thinking, they had a very closed mindset for development and future models.


      https://www.youtube.com/watch?v=Zyj8XpaL2j0
      Jim
      '06 SunnyBrook Titan 34BWKS
      '07 Freightliner Sportchassis
      '11 Chevy Silverado 1500
      '16 Camaro RS

      Comment


      • Per Mark BEX ....

        Today was spent making a spring compressor to change the top bush over with ease.

        Any old junk steel I could find laying around and a turnbuckle with a bit of chain did the job to hold it compressed, and I even put the spring back onto the front suspension with it.

        Easy to make, just a lever arm, but getting the geometry right takes time.
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        This gallery has 1 photos.
        Jim
        '06 SunnyBrook Titan 34BWKS
        '07 Freightliner Sportchassis
        '11 Chevy Silverado 1500
        '16 Camaro RS

        Comment


        • Per Mark BEX ....

          Doing so many little things, but nothing much to directly report, however, the headache of steering has started .. It's the same, but different from the prototype ...

          Today stripped down the new rack to make the mod to the rack shaft as I worked out with all the effort on the first prototype, and happy as Larry to find common 'off the shelf' inner tie rod and outer tie rods the right length, also all from the same manufacturer, and even better, the same manufacturer as the front uprights, brakes etc.

          So one stop shopping for the bulk of the front end
          Jim
          '06 SunnyBrook Titan 34BWKS
          '07 Freightliner Sportchassis
          '11 Chevy Silverado 1500
          '16 Camaro RS

          Comment


          • Per Mark BEX ....

            My lathe guy did my steering rack things today.

            First is to take 100mm/4" off one end, and add it to the other end.

            Second is to turn my nylon bushes, both simple procedures.

            Though the rack isn't stock 'off the shelf', due to the central steering position, it is built from a stock 'off the shelf rack', merely modifying it, and the addition of a nylon bush.

            Point is, it is not a specialised bespoke built item, and any small workshop with a lathe can achieve the same modifications very easily using the off the shelf rack, not that I expect any significant rack wear in it's lifetime on such a light vehicle with no power steering.
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            This gallery has 1 photos.
            Jim
            '06 SunnyBrook Titan 34BWKS
            '07 Freightliner Sportchassis
            '11 Chevy Silverado 1500
            '16 Camaro RS

            Comment


            • Per Mark BEX ....

              My steering rack is looking like a manufacturer's genuine part
              You do not have permission to view this gallery.
              This gallery has 1 photos.
              Jim
              '06 SunnyBrook Titan 34BWKS
              '07 Freightliner Sportchassis
              '11 Chevy Silverado 1500
              '16 Camaro RS

              Comment


              • Per Mark BEX ....

                I think the new "Office" will work out, some final measuring tomorrow, and then to laser it

                Oh, and if it works out, I have lowered the top of the dash by another 1.5" again, over 3" since doing this version. Should help with forward vision considerably.
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                This gallery has 2 photos.
                Jim
                '06 SunnyBrook Titan 34BWKS
                '07 Freightliner Sportchassis
                '11 Chevy Silverado 1500
                '16 Camaro RS

                Comment


                • in reference to pictures in post above :

                  Per Mark BEX ....

                  The lower firewall section was lasered and folded today, after a small mod fits like a charm.

                  I never fully trust CAD, the small mod required was something that you just don't see on the computer.

                  Sorry I left my phone at home today, so no pictures. Do you know how I survived the whole day without a phone? - well if you have to ask that, we probably can't be friends ..... :-)
                  Jim
                  '06 SunnyBrook Titan 34BWKS
                  '07 Freightliner Sportchassis
                  '11 Chevy Silverado 1500
                  '16 Camaro RS

                  Comment


                  • Per Mark BEX ....

                    I've been having a couple of days off due to the heat, looks like it's starting to turn finally, as it should being August.
                    Jim
                    '06 SunnyBrook Titan 34BWKS
                    '07 Freightliner Sportchassis
                    '11 Chevy Silverado 1500
                    '16 Camaro RS

                    Comment


                    • Per Mark BEX ....

                      Ok, back into it today.

                      I added simple mounting tabs to the steering rack, arrows, and the keen eye'd who look hard at racks, will notice that all the complicated mounting nonsense from the prototype has gone, and this setup simply bolts directly to the firewall, hope it works out with the steering geometry.

                      You do not have permission to view this gallery.
                      This gallery has 1 photos.
                      Jim
                      '06 SunnyBrook Titan 34BWKS
                      '07 Freightliner Sportchassis
                      '11 Chevy Silverado 1500
                      '16 Camaro RS

                      Comment


                      • Per Mark BEX ....

                        You might have noticed a bit slow going recently, I just want to assure you that it is nothing more than struggling with the peak heat period, and nothing else, and services will be back to normal soon as the cooler change comes.


                        This week is not looking good, I had to come home today, it's over 110 inside the factory, and little I can do about it sorry.
                        You do not have permission to view this gallery.
                        This gallery has 1 photos.
                        Jim
                        '06 SunnyBrook Titan 34BWKS
                        '07 Freightliner Sportchassis
                        '11 Chevy Silverado 1500
                        '16 Camaro RS

                        Comment


                        • Per Mark BEX ....

                          It started raining this morning, couldn't get to the factory fast enough to take advantage of a (slightly) cooler change, though by late arvo it was scorching again, but at least I got some stuff done.

                          Took a front suspension spring off, and got the tie rod ends hooked up so I could check bump steer and start correcting it.

                          It considerably off, so I had to remove the lower firewall, savagely attack it by beating the lowest bend flat with a hammer, and drilling a bunch of test holes to try different mounting heights for the rack to correct the bump steer (that's why it looks ugly).

                          I settled on 40mm/1.6" lower, and now I will make a new firewall to suit, but this time I will also remove the upper firewall (which is fine), and do a one piece firewall.

                          The other picture is the relationship to the brake pedal , but they are separated longitudinally by quite a margin.

                          You do not have permission to view this gallery.
                          This gallery has 2 photos.
                          Jim
                          '06 SunnyBrook Titan 34BWKS
                          '07 Freightliner Sportchassis
                          '11 Chevy Silverado 1500
                          '16 Camaro RS

                          Comment


                          • Per Mark BEX ....

                            I have spent quite some time searching for the ideal inner and outer tie rod ends for the steering, below is just some of the ones and combinations I have tried, but got lucky again in that not only I finally found the ideal inner and outer from the same vehicle, it's also the biggest selling car (mini van to be exact) in China over the last 20 years, the Wuling Sunshine, point being that supply will never be an issue.

                            Oh and Wuling is 44% owned by GM.

                            Forbes has it at Blogs in their world's best selling cars list ..

                            https://www.forbes.com/pictures/mkk4...EaL8gXr6fvlkyU
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                            Jim
                            '06 SunnyBrook Titan 34BWKS
                            '07 Freightliner Sportchassis
                            '11 Chevy Silverado 1500
                            '16 Camaro RS

                            Comment


                            • when asked : "Is it safe to assume that you will detail all of the sources for the parts (used in the mongrel) in some type of repair manual or repair CD/thumbdrive??
                              Like the bushings from the Chevy Colorado, the tie rods from the Wuling Sunshine, etc."

                              Mark responded : "You assume correctly."
                              Jim
                              '06 SunnyBrook Titan 34BWKS
                              '07 Freightliner Sportchassis
                              '11 Chevy Silverado 1500
                              '16 Camaro RS

                              Comment


                              • Per Mark BEX ....

                                Just finished the cnc file for the new firewall, hope to get it cut and folded tomorrow, or the day after at most.

                                Big job to fit it, all the old stuff gets cut out, hope it cools down a bit in the next few days.

                                I thought I was going to need 2 x sheets of metal, but as you can see, I just squeezed the 4 items onto one sheet, pleased about that
                                You do not have permission to view this gallery.
                                This gallery has 2 photos.
                                Jim
                                '06 SunnyBrook Titan 34BWKS
                                '07 Freightliner Sportchassis
                                '11 Chevy Silverado 1500
                                '16 Camaro RS

                                Comment

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