Super ETA verification

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  • turbski
    Grease Monkey
    • Jul 2018
    • 329

    #16
    Does this sound correct?

    Comment

    • digger
      R3V Elite
      • Nov 2005
      • 5911

      #17
      looks like seta slugs which are b25 but valve reliefs smaller. Can you put cylinder 1 at tdc and take pic so we can see if it sits low w.r.t deck
      89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

      new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

      Comment

      • turbski
        Grease Monkey
        • Jul 2018
        • 329

        #18
        At top dead center the piston protrudes a bit. What is w r t

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        • turbski
          Grease Monkey
          • Jul 2018
          • 329

          #19
          With reference to? Lol super slow I am

          Comment

          • digger
            R3V Elite
            • Nov 2005
            • 5911

            #20
            Yeah I mean the edge of piston not the very top of crown
            89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

            new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

            Comment

            • turbski
              Grease Monkey
              • Jul 2018
              • 329

              #21
              not the best but shows how far the crown is out of the block and the edge of the piston as well if that's what your looking forClick image for larger version

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              Comment

              • digger
                R3V Elite
                • Nov 2005
                • 5911

                #22
                Yeah pretty certain it's a SET
                89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

                new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

                Comment

                • turbski
                  Grease Monkey
                  • Jul 2018
                  • 329

                  #23
                  all the research ive done along with measurments seem legit, thanks for helping to verify. big help. off to the machine shop it goes!

                  Comment

                  • turbski
                    Grease Monkey
                    • Jul 2018
                    • 329

                    #24
                    Last question. For future reference. What about the piston protrusion tells ya what your looking at. This is purely a question of wanting to learn more.

                    Comment

                    • digger
                      R3V Elite
                      • Nov 2005
                      • 5911

                      #25
                      Reasons are
                      - pistons are not a few mm down bore like it would with 130 rod, 81 stroke and b25 piston
                      - reliefs are shallower than b25
                      - raised squish area similar to b25 but is smaller radially
                      89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

                      new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

                      Comment

                      • turbski
                        Grease Monkey
                        • Jul 2018
                        • 329

                        #26
                        cool. thanks for the info

                        Comment

                        • turbski
                          Grease Monkey
                          • Jul 2018
                          • 329

                          #27
                          So I am gathering parts and ordering rebuild pieces. Would the piston rings be the same as the 2.5l as its the same bore?

                          Comment

                          • digger
                            R3V Elite
                            • Nov 2005
                            • 5911

                            #28
                            from memory they are different, check out realoem P/N's
                            89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

                            new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

                            Comment

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