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Zephyr's Lachs M52B30 Stroker Build **ITBs**

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    Can always do a cable cam too, where the cable pull has varying radii as it opens....


    https://www.yellowbullet.com/threads...-body.1016770/
    john@m20guru.com
    Links:
    Transaction feedback: Here, here and here. Thanks :D

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      Originally posted by ForcedFirebird View Post
      Can always do a cable cam too, where the cable pull has varying radii as it opens....


      https://www.yellowbullet.com/threads...-body.1016770/
      A varying radius pulley is what I was referring to in my TPI 400 anecdote. I thought that's what you were talking about as well.

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        So when rebuilding this engine I reused piston rings with different rods, and I have always been a little nervous about this.
        I also have been having some minor white smoke and so I wanted to see how the engine is doing.
        I did a leak down test with the engine cold and got the following result:

        1 - 98%
        2 - 97%
        3 - 96%
        4 - 98%
        5 - 94%
        6 - 97%

        These were with 100psi reference. I think the results would be better if I did the test with the engine warm, and I will probably get around to this eventually.
        I definitely feel very lucky with how reusing rings worked out.




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          Swapped out the emblem to better represent the displacement.
          I was tempted to leave it stock, but so much of the rest of the car has been messed with by previous owners I don't think it makes much sense to worry about keeping it original. (Also yes I need to clean up the glue strands around the new emblem).

          I really need to re-clear the tail lights, but I have tons of time because of COVID so I'll get to that soon.

          Click image for larger version

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            Neat Emblem! Especially the fact that it's in the older style. Where did you get it from? I've been considering a custom emblem and actually modeled it in Solidworks. The price for a 3D printed stainless was just a bit steep for my liking. Although mine of course said "ARMO"
            E30 Armo "330i"

            Comment


              Originally posted by Skarpa View Post
              Neat Emblem! Especially the fact that it's in the older style. Where did you get it from? I've been considering a custom emblem and actually modeled it in Solidworks. The price for a 3D printed stainless was just a bit steep for my liking. Although mine of course said "ARMO"
              Hahah thanks. You can just barely see from this angle but it is actually just two 325 badges stitched together!
              Like you I wanted to machine one, but now that my school's machine shop is closed I will have to wait. Most likely I will try to machine it out of aluminum (much easier to machine) and then chrome plate it.

              Comment


                Originally posted by Skarpa View Post
                Neat Emblem! Especially the fact that it's in the older style. Where did you get it from? I've been considering a custom emblem and actually modeled it in Solidworks. The price for a 3D printed stainless was just a bit steep for my liking. Although mine of course said "ARMO"
                The ballers go with 3D printed titanium.

                Comment


                  So youve been running about a year no problem with a full set of m52 rings?

                  Im rebuilding an m54b30 motor for boost and ordered m52 rings. Since there is so much conflicting info I assumed you could use all 3 m52 rings n the m54 piston, but it seems the general consensus is that you use the lower two m52 rings and the m54 top ring. I really dont want to order new rings and deal with sending these back so Im tempted on trying what you did. Only thing that scares me is the top ring being too tight when warm. Is there such a thing as vertical clearence when it comes to rings?

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