Dual chamber master cylinder for drum brakes

[KULTULZ]

Originally Posted by V8 Bob

While most of the above info on proportioning valves is correct, the actual operation is not. Fluid is never "blocked", but is delivered based on the percentage value of the valve once the "crack point" pressure is exceeded.

Can we agree on restricted flow as pressure increases at the knee point?

GM did use a PPV on some all drum applications. Makes perfect sense to me. But ABS has changed all of this.

What I am trying to point out is that the ill-conceived notion that an ADJ PPV will correct all situations. That is why they are not approved for the street. Their function is race car only.

Some of these so-called "BRAKE KIT SELLERS" are dangerous (IMO).

INFO SOURCE BELOW - https://www.brakes-shop.com/brakeped...tioning-valves