Brake booster discovery?

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  • MacBudd541
    E30 Enthusiast
    • Apr 2006
    • 1042
    #1

    Brake booster discovery?

    I was trying to decide what to do about a booster for the S52 swap and i gathered up all the boosters i could find in the shop. I may have made a new discovery. one of the boosters seems to be a perfect fit. I dont have my old booster out yet to make sure its a bolt-it but it looks good so far. The booster in question is from an e21 323i...i think. It was not labeled but it was in my stack of old e21 parts. From left to right looking at the master side #1 is from a 95 M3 for sure. #2 i think is just a regular 320i booster. #3 is a stock e30 booster for sure. #4 i think is the e21 323i booster. It sure looks to me like its going to bolt right in. cross your fingers, maybe this is the unmodified booster "answer".
    -Mac







    1989 325i Alpine s52 coupe
    2003 540i M-Sport 6 speed
    2003 X5 3.0
    Tags: None
    • e30s52
      R3V Elite
      • Oct 2007
      • 5235
      #2
      Looks just like the e21 booster that I am using.

      www.gutenparts.com
      One stop shopping for NEW, USED and EURO PARTS!

        Comment

        • MacBudd541
          E30 Enthusiast
          • Apr 2006
          • 1042
          #3
          Originally posted by e30s52
          Looks just like the e21 booster that I am using.
          And you did not have to modify anything to make it work?
          1989 325i Alpine s52 coupe
          2003 540i M-Sport 6 speed
          2003 X5 3.0

            Comment

            • e30s52
              R3V Elite
              • Oct 2007
              • 5235
              #4
              Originally posted by MacBudd541
              And you did not have to modify anything to make it work?
              I swapped forks I believe. I got mine from funk master and he said it would work. I have no clue though if it is a 323i booster or not.

              The booster you have though looks identical to mine so give it a try.

              www.gutenparts.com
              One stop shopping for NEW, USED and EURO PARTS!

                Comment

                • Van Westervelt
                  R3V OG
                  • May 2006
                  • 9365
                  #5
                  Usually you have to shorten the e21 booster's pushrod. But that 323i one looks to be near the right length! Nice score!
                  sigpic

                    Comment

                    • BMW_TUNER
                      E30 Fanatic
                      • Jul 2006
                      • 1377
                      #6
                      944 is the way to go and you can score them in any pick and pull. It is just small enough without killing boost.
                      1989 332IS -S-Fiddy Four-Some weight removed.
                      5 lug E36 M3 Brakes Coilovers and LTW's and No ABS.

                        Comment

                        • rosphill
                          Advanced Member
                          • Jun 2007
                          • 187
                          #7
                          Is it possible to insert a thick aluminum spacer between the brake booster and the firewall to make the rod not go as far through the firewall to the pedal?
                          Or would that make the E21 booster too far towards front of car?
                          I'm not sure I'm sold on the safety of the E21 brake booster pushrod mod yet.


                          Originally Posted by Blunt
                          I've done this so much I have a toenail on my dick.

                            Comment

                            • e30s52
                              R3V Elite
                              • Oct 2007
                              • 5235
                              #8
                              Originally posted by rosphill
                              Is it possible to insert a thick aluminum spacer between the brake booster and the firewall to make the rod not go as far through the firewall to the pedal?
                              Or would that make the E21 booster too far towards front of car?
                              I'm not sure I'm sold on the safety of the E21 brake booster pushrod mod yet.
                              That would make it go to far forward. You have to cut it and reweld it.

                              www.gutenparts.com
                              One stop shopping for NEW, USED and EURO PARTS!

                                Comment

                                • ethrty
                                  Grease Monkey
                                  • Nov 2009
                                  • 342
                                  #9
                                  Originally posted by BMW_TUNER
                                  944 is the way to go and you can score them in any pick and pull. It is just small enough without killing boost.
                                  thats good to hear! thats what im using. car isnt drivable yet so cant say my opinion on it though

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