Join Shelby Forums Today

Proportioning valve question

Discussion in '1965-1970 Shelby Mustang GT350 & GT500' started by octoberglory, Jan 27, 2014.

  1. octoberglory

    octoberglory Active Member

    Posts:
    36
    Likes Received:
    0
    Joined:
    May 25, 2008
    Greetings, In restoring a '66 Shelby, is it necessary to rebuild the proportioning valve? I don't even know the principle behind one or how to adjust it. Any advice is appreciated. Thank you
     
  2. geez428

    geez428 Member

    Posts:
    18
    Likes Received:
    0
    Joined:
    Jan 29, 2011
    If it is working, and could be cleaned up nice, I would go ahead. It also depends on the use of the car.
    Just an opinion
     
  3. 66GT350PS

    66GT350PS Well-Known Member

    Age:
    76
    Posts:
    297
    Likes Received:
    6
    Joined:
    Sep 7, 2005
    Location:
    HAWAII
    The valve provides different pressure from the single chamber master cylinder to the front and rear brakes. Your front discs take about 80 percent of the brake pressure. There are after market adjustable units with large knobs that are easier to use when you are changing driving styles based on street or various track configurations. It is a valuable piece to keep and a real PIA to repair. I pulled mine out to replace with a after market one for easier adjustments (available from most brake supply vendors). However, the original sits in storage for when it is needed for car shows. :cool:
     
  4. 2+2=gt350

    2+2=gt350 Active Member

    Posts:
    35
    Likes Received:
    1
    Joined:
    May 8, 2012
    Location:
    westfield ind
    Good info on the valve and rebuild advice at www.stangerssite.com Look in the "other stuff" at the bottom of the home page.
     
  5. octoberglory

    octoberglory Active Member

    Posts:
    36
    Likes Received:
    0
    Joined:
    May 25, 2008
    Thank you for the information. I'll check it out. Also, thanks to all that gave their input.
     

Share This Page