B20 injectors on B25

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  • ADEN
    Mod Crazy
    • Feb 2008
    • 620

    #1

    B20 injectors on B25

    I have a new set of white M20b20. Can i put them on M20b25 with no problems?
  • digger
    R3V Elite
    • Nov 2005
    • 5910

    #2
    what's the bosch p/n?
    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

    • 4ce30
      R3VLimited
      • Feb 2006
      • 2762

      #3
      No to white on b25 . Those also are ran in the etas just look for blue 14.5 per hr i believe
      sigpic

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      • ADEN
        Mod Crazy
        • Feb 2008
        • 620

        #4
        What might happen if i do put em in?

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        • ADEN
          Mod Crazy
          • Feb 2008
          • 620

          #5
          Originally posted by digger
          what's the bosch p/n?
          0280150716

          Comment

          • digger
            R3V Elite
            • Nov 2005
            • 5910

            #6
            those are low impedance injectors they may fry something electric. i would source a high impedance 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

            • ADEN
              Mod Crazy
              • Feb 2008
              • 620

              #7
              Originally posted by digger
              those are low impedance injectors they may fry something electric. i would source a high impedance set
              How come!? Same set is installed in my 320i Bosch met. V1.3 for years with no problems.
              As per the pic below they are high impedance mine test 15-16 Ω.
              Attached Files
              Last edited by ADEN; 04-09-2021, 03:11 PM.

              Comment

              • digger
                R3V Elite
                • Nov 2005
                • 5910

                #8
                if they are low impedance then fine, when i searched somehow they appeared to be low impedance. can just measure rsistance across pin to confirm
                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

                • ADEN
                  Mod Crazy
                  • Feb 2008
                  • 620

                  #9
                  Originally posted by digger
                  if they are low impedance then fine, when i searched somehow they appeared to be low impedance. can just measure rsistance across pin to confirm
                  I confirm they are 15-16 Ω but am i ok running them in b25 at 2.5bar regulator from b20?

                  Comment

                  • digger
                    R3V Elite
                    • Nov 2005
                    • 5910

                    #10
                    116 g/min = ~116*60/1000*2.204 = 15 lb/hr
                    SQRT(2.5/3.0) = 0.91

                    so flow will be 0.91*15.3 = 14 lb/hr so its only 7% less than stock

                    should run ok with O2 sensor feedback with the ECU is functioning correctly and engine is stock, if you can get 3b regulator there will be less corrections going on wihtin the ECU.
                    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

                    • ADEN
                      Mod Crazy
                      • Feb 2008
                      • 620

                      #11
                      Originally posted by digger
                      116 g/min = ~116*60/1000*2.204 = 15 lb/hr
                      SQRT(2.5/3.0) = 0.91

                      so flow will be 0.91*15.3 = 14 lb/hr so its only 7% less than stock

                      should run ok with O2 sensor feedback with the ECU is functioning correctly and engine is stock, if you can get 3b regulator there will be less corrections going on wihtin the ECU.
                      Thanks alot digger i guess i will just use them and see how it goes.

                      Comment

                      • ADEN
                        Mod Crazy
                        • Feb 2008
                        • 620

                        #12
                        Update:
                        I got my hand on 3.0 bar regulator bosch 0280160258 it appears to be for the 4 cylinder engines i hope this will help b20 injector to flow better in b25 engine.right?

                        Comment

                        • digger
                          R3V Elite
                          • Nov 2005
                          • 5910

                          #13
                          It should
                          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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