Vintage Mustang Forums banner

Forum Discussions about this Product

1 - 3 of 3 Posts
    1. · Registered
      1,205 Posts
      That's the way to go, there is no reason to have a factory-style distribution block if you just put a T in to split the front brake lines, and do your proportioning to the rear via an adjustable valve in the rear brake line.
      That's what I did. Either of these will work (both the same).

      Summit Racing SUM-G3905 - Summit Racing® Brake Proportioning Valves - Overview -

      Wilwood Disc Brakes 260-8419 - Wilwood Brake Proportioning Valves - Overview -
    1. · Registered
      172 Posts
      Discussion Starter · #6 ·
      I got an explorer 8.8 for my 68 for $125. It has disc brakes, locker rear end with SUV extra clutch packs, and a 373 gear. The rear end is wider so it will work it just changes things for the wheel off sets. Fine with me I want to push my rear wheels / tires out more anyway. After I get mine in I plan to have my rear wheels widened and get wider tires. My 245/45 17's look puny and too tucked under the rear. The Explorer rear has the center chunk off set more to one side. I heard the floor pan just needs to be pushed in some where the off set center section will hit.

      I want to know what drive shaft etc.. needs to be used to make the 8.8 work with an AOD transmission ???

      Mustang Steve suggested I used an 03/04 Cobra masrtercylinder for my 4 wheel disc brakes since I'm going to stay manual brakes. I have 12.5in +'05 Mustang discs / calipers for my fronts.
      I hear the alum. drive shaft in the explorer works not sure about the aod though maybe a newer cobra drive shaft ? How do your breaks work in your setup ? did you use something like this to? :
    1. · Registered
      2,557 Posts
      Discussion Starter · #50 ·
      I’m not sure what proportioning valve you are using now or the one you are changing to. However, the Tilton valve I use has a automatic diversion circuit for threshold braking. Essentially what happens is the valve allows pressure to the rears under normal braking. During threshold braking a larger portion of that pressure is diverted to the front.
      I thought that is essentially how the adjustable valves worked... taking a chart from the model Mark is using...

      Brake pressure is equally distributed in the system up to a point, the "knee" if you will, and then outlet pressure only increases a small percent over inlet pressure past this "knee".

      I first grabbed this Summit special one...

      And now have this one on the way...

      I had no idea how much pressure reduction I would need to dial it in, but apparently its more than the 37% bias the Summit one allows. That Tilton one looks like it can reduce bias by ~58% of total pressure, just like the Wilwood one. That Summit one would only reduce pressure to half way between position 3 and 4 on the Tilton model, I need those few extra positions to dial mine in.
1 - 3 of 3 Posts

Forum Reviews

Be the first to review this product

Write a Review

Do you have experience with this item? Help our community members and share your knowledge.

Sign in to add review