Results 1 to 4 of 4

Thread: brake prop valve

  1. #1
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,495
    Feedback Score
    15 (100%)

    Default brake prop valve

    so... i think i just learned me somethin'

    the brake prop valve on a v6 is different than the prop valve on a v8!

    the bottom front fitting feeds the rear wheel cylinders.

    i have my old stocker v6 prop valve and the fitting and line size for the hole in the fitting is smaller than a prop valve for a V8.

    in my mind, there is no reasonable purpose for either car to have a different prop valve.

    both came factory equipped with drum rear only wheel cylinder design.

    apparently the v8 cars came off the line with a larger rear brake feeder line than the V6,,, which from a safety perspective makes no sense.

    so... and upgrade to any v6 guys to get more fluid to the rear would be to install a v8 prop valve and upgrade the line that travels back to the rubber flex line above the pass axle tube.

    thoughts on this........?

  2. #2
    Join Date
    Feb 2009
    Location
    Belleview, FL
    Posts
    2,847
    Feedback Score
    8 (100%)

    Default

    well the difference could also be something to do with the 10" optional drums that came on some cars... could be even though they both came with drum rears, my understanding was that it was possible to get 10" vs 9" optioned up. So it may be something that comes as part of that option. Bigger line to better push the bigger shoes? I would measure the diameters on the 2 cars and see if that's the case
    --Steve
    1988 Cougar V6
    2012 F-150 3.7L
    2011 Mustang 3.7L

  3. #3
    Join Date
    Jun 2005
    Location
    Chicago
    Posts
    10,724
    Feedback Score
    17 (100%)

    Default

    Got a picture? Both V6/V8 with rear drums should be the same.
    '88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, Edelbrock 70mm TB, 76mm C&L MAF, 30lb injectors, 2.5" exhaust, AOD with 2800 PI converter, 8.8 with 3.73 gears, 31 spline Traction-Lok, 31 spline Moser axles, 04 Cobra front arms, Maximum Motorsports extreme duty rear arms, subframes.
    '11 Focus, '12 Mustang 3.7, '17 Accord EX-L V6

  4. #4
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,495
    Feedback Score
    15 (100%)

    Default

    well,, i can take a pic of the two side by side,, but it wont reveal anything.

    the fitting for the rear is smaller on the V6 than the V8.

    i think steve is right though,, if 9''or 10'', then that would prob be why ,,

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •