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Thread: A few new things, brake bias valve and water pipes

  1. #1 A few new things, brake bias valve and water pipes 
    club member Club Member Patrick's Avatar
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    Radiator Return Pipe

    Since the car was built the return radiator hose as been a long flexi pipe, this was never a good solution. At some points the pipe rubs which eventually would have cause a leak.



    To solve this the flexi pipe has been replaced with a 90 degree aluminium bend and very short run of flexi pipe on either side.


    Aluminium bend installed in the car



    New pipe from below (missing the hose clamps in this photo!)


    Filled and bled the coolant system, checked for leaks.


    No functional difference, but safer long term.


    ----

    Rear Brake Pressure Regulator

    Someone pointed out the stock BMW rear brake pressure regulator was incorrectly mounted on the car. Not sure if this made much difference as it has always worked. However decided to fix this and add some adjustability if needed in future in the form of a Wilwood Brake Proportioning Valve. The wilwood valve part number 260-12627 has M10 threads so the existing pipe fittings could be used.

    Marked up the position for the first mounting hole.



    First hole drilled, inserted a rivnut here.


    Test fit, checking alignment for the top hole.


    Both holes drilled and rivnuts inserted.



    Final fit of the Wilwood valve.


    The inlet and outlets are in roughly the same place as the old valve which will make moving the hardline easier.


    Removed the P clip holding the pipe and added two new bends bringing the pipe up to the new valve.


    View from above – it’s easy to get to and make adjustments.


    The input pipe from the master cylinder is a braided flexi pipe which made installation easy. Lining the threads up to some effort as the tolerances are really close.


    Close up view from above.


    The final step was bleeding all four corners, replaced the fluid throughout as it had gone quite dark, photo shows the old colour. New fluid is much clearer.


    Not done any testing/setup yet as it was raining all day.
    Last edited by Patrick; 14-12-2020 at 04:54 PM.
    BMW E30 Sportster 2005 - M20B28 - Build Log and Updates http://www.msportster.co.uk/
    http://www.modelog.co.uk/
    http://www.mustang67.co.uk/
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  2. #2 Re: A few new things, brake bias valve and water pipes 
    club member Club Member David's Avatar
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    Great work, in days of old, when I could afford to rally and hill climb I would put a line on the brake bias valve body, and a corresponding line on the adjustment knob so I could be sure where the neutral setting was. Then I could add additional marks either way for road or competition use in dry or wet.
    - 4th owner of Q309 RNV, an early Cabrio built by Bob Copping, owned by Danny then Doug & Liz Billings for 16 years
    - 9th Custodian of JRR 929D, the Triumph Vitesse based special Paul Moorehouse built prior to the Triumph based Roadster kits.
    - 8th owner of Roadster chassis number 2395. Kit manufactured 1983, first registered in 1987. Now owned by Barry!
    - Builder of chassis number 2325 (PKK 989M) in the mid 80's. Now owned by Eric & Lynne in the NE of England.
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  3. #3 Re: A few new things, brake bias valve and water pipes 
    club member Club Member Patrick's Avatar
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    Thanks, I'm looking forward to having a play with the settings next decent weather day. It also prepares it if I decide to add bigger brakes so I can balance it properly (something I've thought about on and off for years now! Here's to more years of thinking about it ).
    Last edited by Patrick; 18-12-2020 at 08:23 PM. Reason: typo
    BMW E30 Sportster 2005 - M20B28 - Build Log and Updates http://www.msportster.co.uk/
    http://www.modelog.co.uk/
    http://www.mustang67.co.uk/
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  4. #4 Re: A few new things, brake bias valve and water pipes 
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    Yes Patrick it doesn't do to rush into things. Being hasty is asking for trouble.
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  5. #5 Re: A few new things, brake bias valve and water pipes 
    club member Club Member Patrick's Avatar
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    You can never get to a project being 'finished'
    BMW E30 Sportster 2005 - M20B28 - Build Log and Updates http://www.msportster.co.uk/
    http://www.modelog.co.uk/
    http://www.mustang67.co.uk/
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