Originally Posted by SportF
Here is the best picture of a "proportioning valve" I have seen. This is the valve necessary to give you the dual brake system "cut off the leaking side" brakes.


Wrong.

A dual circuit master cylinder is what's necessary. Any other valves are for fine tuning. There's numerous OEM applications that are plumbed with the front brakes straight to the master and rear brakes may have a proportioning valve or an ABS valve.

Angry white pureblood male