m20b25 with b27 head

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  • e30m20beast
    Advanced Member
    • Aug 2009
    • 176

    #1

    m20b25 with b27 head

    I will like to know if placing the b27 head on the b25 motor will give more torque and HP? if it does It will be a bolt on type of thing or you need to replace everything? Also if there is anything I can do to give my car some more power for cheap please tell me I am interested in all cheap power I can get. thanks
  • dashboardmonkey
    FUCK YOUR WAFFLES
    • Jun 2008
    • 6158

    #2
    first!
    -Andy

    Comment

    • e30m20beast
      Advanced Member
      • Aug 2009
      • 176

      #3
      Originally posted by dashboardmonkey
      first!
      ?

      Comment

      • Wishno87
        R3V OG
        • Jul 2007
        • 6025

        #4
        I think you mean B27 block with B25 head
        Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

        Comment

        • e30trooper
          R3V OG
          • Mar 2009
          • 11576

          #5
          yea i think he means 2.7i lol

          Comment

          • e30m20beast
            Advanced Member
            • Aug 2009
            • 176

            #6
            no I meant B25 block with the B27 head, I know some people do it without doing anything to the block( I have seen it)

            Comment

            • jlevie
              R3V OG
              • Nov 2006
              • 13530

              #7
              The short answer is no. There's nothing to be gained from mating a B27 head with a B25 block.
              The car makes it possible, but the driver makes it happen.
              Jim Levie, Huntsville, AL

              Comment

              • slo325i
                E30 Addict
                • Aug 2008
                • 417

                #8
                That's like intentionally creating a bottle neck in the system...


                '89 325i - Totaled... good bye my love...
                '87 327i budget stroker - SOLD!!!
                '92 240sx - ca18det powered drift toy - SOLD!!!
                '89 325i - coupe - NEW daily
                '96 Audi A6 Quattro- Grocery getter/baby hauler
                '99 Busa - weekend wheelie monster

                Comment

                • nando
                  Moderator
                  • Nov 2003
                  • 34827

                  #9
                  it won't fit anyway. the pistons will hit the head.
                  Build thread

                  Bimmerlabs

                  Comment

                  • ck_taft325is
                    R3V OG
                    • Sep 2007
                    • 6880

                    #10
                    ^ Exactly.

                    What you've seen is the 2.7 ETA block with the 2.5 "i" head, intake, TB, ect ect...

                    If you've seen the 2.7 ETA head on a 2.5 "i" block, you've seen a broken engine.
                    Need a part? PM me.

                    Get your Bass on. Luke's r3v Boxes are here: http://www.r3vlimited.com/board/showthread.php?t=198123

                    Comment

                    • e30trooper
                      R3V OG
                      • Mar 2009
                      • 11576

                      #11
                      b25 block with a b27 head would = higher compression , but the top of the piston would hit the head. besides whats the point lower reving?

                      Comment

                      • nando
                        Moderator
                        • Nov 2003
                        • 34827

                        #12
                        higher compression until you crank it over, smash into the head and bend a rod or worse. ;)
                        Build thread

                        Bimmerlabs

                        Comment

                        • Danny
                          Moderator
                          • Feb 2008
                          • 14216

                          #13
                          Originally posted by e30trooper
                          b25 block with a b27 head would = higher compression , but the top of the piston would hit the head. besides whats the point lower reving?
                          You just need to stop, friend. You're embarrassing yourself.

                          Comment

                          • LowR3V'in
                            R3V Elite
                            • Feb 2004
                            • 4209

                            #14
                            Originally posted by nando
                            it won't fit anyway. the pistons will hit the head.
                            but he's SEEN IT DONE!!!

                            Comment

                            • e30trooper
                              R3V OG
                              • Mar 2009
                              • 11576

                              #15
                              Originally posted by Danny
                              You just need to stop, friend. You're embarrassing yourself.

                              Comment

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