my original question still stands, which, once again, is.. If I have a proportioning valve directly under the dual MC, the MC is 3 inches higher than the top of the calipers, the prop valve about 1 inch above, what is the impact of the prop valve in keeping this 'backfill' phenomenon from happening? From what I read in the CPP documentation, I still don't know.
This is the answer once again in a different way. Repeat, this is the answer to the above question. The answer to your question is as follows: Answer; Prop valve has no impact on the phenomenon, which is not a phenomenon, just gravity. Furthermore: It is advisable, but not mandatory, to put the residual valve (s) close to prop outlet. They are a one way check valve and up stream fluid (towards the wheel cylinders)is kept from flowing back because the valve is closed in that direction. I believe down stream (towards prop valve)is kept from flowing back do to the phenomenon of finger over end of a straw principle. The lines become charged/pressurised by pedal and all stays pressurised using these R-valves, thus not allowing the springs/rods/piston to "pull" back on the shoes as much as without them. The pads have no springs and therefore just relax after pedal is released and don't move very far away from rotor. All experts say you need one for the drums because of the pesky return springs and half of the experts say put one on the discs. Put them ANYWHERE before the "T".
If you do not like the internet or searching websites or using the web as a great resource, you will be at a great disadvantage in your hobby. But there will always be someone here that will look it up so they can learn. I don't know all this crap, I look it up, think about what I read on the net, what I read from the stovebolt and use what little I know and try to give a correct answer...albeit several times.
