Bmw or MB brake booster size

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  • apiazza2010
    Advanced Member
    • Nov 2013
    • 131
    #1

    Bmw or MB brake booster size

    I have an LS swap in my e30 and I'm trying to figure out why my brakes are spongy and soft.
    I am using a universal booster with an adapter I made for the bmw master cylinder.
    Are there any Bmw or Mercedes booster that are compatible with the e30 master cylinder that are 7" in diameter ?
    Thanks
    LS1 91 325i - BC Coils, e46 m3 brakes,style 32 17x9, Red Plastidip, H/C/I

    Tags: None
    • Stvstr
      Member
      • Dec 2013
      • 82
      #2
      The Mercedes 190 booster is supposed to be about 7", there is info on it's compatibility either on this forum or R3V. Sorry, can't remember whose build thread. My research online indicated that some Porsche 911 boosters from the late 70's were 7" and fit the e30 m/c.

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        • SkiFree
          R3VLimited
          • Jun 2011
          • 2766
          #3
          Bmw 2002Tii (left hand drive) are just about 7" in diameter exactly. They aren't cheap though.
          ADAMS Autosport

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