yeah I know that I shouldn't put this here but I have 3 weeks till my next race and I am at a loss and need a solution urgently.
The problem: my race car (24 hrs of Lemons) is a 1993 VW Fox, it has drum rear brakes. On the brake lines between the hard lines and the rubber lines that go to the axle above the rear axle on each side is a small tube listed in the shop manual as a brake proportioning valve. Unfortunately one of them has a slight leak (its weeping a very tiny amount, it leaked more but re tightening it fixed it, the leak now is coming from the middle of the valve where some sort of rubber band seal is around it). The real problem is nobody has this part, it basically no longer exists, and the ones found in junkyards generally are leaky too.
We want the rear brakes to remain functional, and we really have no need for adjustment, we want them to "just work" as they did, they were fine.
The ONLY solution I have come up with so far is to use an adjustable valve like Wilwood sells here:
http://www.wilwood.com/MasterCylinde...derValves.aspx
Problem is I don't even know where to set it to get it right.
They also have those residual pressure valves, what if I like flipped one of those around to give minimum pressure to the back?
Any other suggestions? Trying not to spend a million bucks on this.