M20B25 Head mods

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  • Tree25
    Advanced Member
    • Mar 2011
    • 118

    #1

    M20B25 Head mods

    I posted earlier in the week about snaping a rocker arm in my m20. Since i do have the head out of the car id like do splurge a bit extra since i dont plan on taking the head off again.

    Looking at IE heavy duty Rocker arms, New Rocker shafts, and a Regrind 272 cam...All of this with the gaskets, belt, pump, tensioner etc. Im already looking at close to a G before sending the head to the machinde shop.

    This is my first rebuild...Pros/Cons?
  • Jafxod
    E30 Fanatic
    • May 2011
    • 1301

    #2
    Then you are 500 away from an S52. Be wise ;)

    Comment

    • Tree25
      Advanced Member
      • Mar 2011
      • 118

      #3
      All parts needed, your telling me I can have an s52 for 1500?

      Comment

      • ScHpAnKy
        E30 Mastermind
        • May 2009
        • 1573

        #4
        Originally posted by Tree25
        All parts needed, your telling me I can have an s52 for 1500?
        I don't see why not, as long as you can source an oil pan for cheap.

        91 318i | 87 535iS

        Comment

        • acolella76
          R3VLimited
          • Apr 2010
          • 2950

          #5
          Originally posted by Tree25
          All parts needed, your telling me I can have an s52 for 1500?
          MAYBE you can buy the engine for that much, but it won't even touch the car for $1500
          -Alex

          Comment

          • Teaguer
            R3V OG
            • Sep 2004
            • 6167

            #6
            Don't waste $$ on all that unnecessary shit.
            Buy the cam and rocker that needs replacing and valve guide seals. Thats it.
            Then spend the extra $$ on some long tube headers.

            E30 M3 / E30 325is / E34 525iT / E34 535i

            Comment

            • delatlanta1281
              Dart Master
              • Mar 2006
              • 10317

              #7
              If you do the regrind, you will need oversized eccentrics as well. Just buy the billet cam. Heavy duty rockers aren't needed unless you are constantly living over 7000 rpms. What are you wanting to do with this engine, what are you currently running as far as software/ mods? You could go bigger valves as well to help the head inhale/ exhale better.
              Last edited by delatlanta1281; 09-07-2011, 08:18 PM.
              Yours truly,
              Rich
              sigpic
              Originally posted by Rigmaster
              you kids get off my lawn.....

              Comment

              • Bearmw
                E30 Fanatic
                • Aug 2010
                • 1323

                #8
                stock head rebuild, ltw flywheel, and 3.90 small lsd= more bang for the buck I think.
                Never argue with stupid people, they will drag you down to their level and beat you with experience. -Mark Twain

                Comment

                • Myster-E
                  Performance
                  • May 2009
                  • 552

                  #9
                  Originally posted by delatlanta1281
                  If you do the regrind, you will need oversized eccentrics as well. Just buy the billet cam. Heavy duty rockers aren't needed unless you are constantly living over 7000 rpms. What are you wanting to do with this engine, what are you currently running as far as software/ mods? You could go bigger valves as well to help the head inhale/ exhale better.
                  You shouldn't need bigger eccentrics for a 272 cam. I have run several reground cams that were much wilder than than that with no issues with stock eccentrics.
                  1988 E30 335i - 1987 E30 327i - 1987 E30 327iS Pickup - 1973 2002 Project

                  Visit www.BimmerHeads.com for all of your 12 valve needs!

                  Comment

                  • lolcantturn
                    R3V Elite
                    • Oct 2010
                    • 4588

                    #10
                    Originally posted by Tree25
                    All parts needed, your telling me I can have an s52 for 1500?
                    Undoubtedly.

                    Originally posted by acolella76
                    MAYBE you can buy the engine for that much, but it won't even touch the car for $1500
                    You're right, it won't. It'll probably be a hair under $1480.
                    Originally posted by TSI
                    ♫ Rust flecks are falling on my head...♫
                    OEM+

                    Comment

                    • delatlanta1281
                      Dart Master
                      • Mar 2006
                      • 10317

                      #11
                      Originally posted by Myster-e
                      You shouldn't need bigger eccentrics for a 272 cam. I have run several reground cams that were much wilder than than that with no issues with stock eccentrics.
                      Huh, interesting, I didn't know that.
                      Yours truly,
                      Rich
                      sigpic
                      Originally posted by Rigmaster
                      you kids get off my lawn.....

                      Comment

                      • delatlanta1281
                        Dart Master
                        • Mar 2006
                        • 10317

                        #12
                        Originally posted by lolcantturn


                        You're right, it won't. It'll probably be a hair under $1480.
                        You planning on replacing anything on that 1500 dollar motor, or you just going to shove it in there and hope it gets you to work in the morning?
                        Yours truly,
                        Rich
                        sigpic
                        Originally posted by Rigmaster
                        you kids get off my lawn.....

                        Comment

                        • acolella76
                          R3VLimited
                          • Apr 2010
                          • 2950

                          #13
                          Originally posted by delatlanta1281
                          You planning on replacing anything on that 1500 dollar motor, or you just going to shove it in there and hope it gets you to work in the morning?
                          You probably forgot that this is r3v when you posted that.
                          -Alex

                          Comment

                          • delatlanta1281
                            Dart Master
                            • Mar 2006
                            • 10317

                            #14
                            Originally posted by acolella76
                            You probably forgot that this is r3v when you posted that.
                            Just trying to change the world.
                            Yours truly,
                            Rich
                            sigpic
                            Originally posted by Rigmaster
                            you kids get off my lawn.....

                            Comment

                            • acolella76
                              R3VLimited
                              • Apr 2010
                              • 2950

                              #15
                              I really want to know how this guy can swap an S52 into an E30 for less than $1500
                              -Alex

                              Comment

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