Quote:

Quote:

The master cylinder volume is to displace the area of the of the pistons or wheel cylinders.A proportioning valve controls the pressure.A stock valve and a race valve do the same thing they open and close the passing orfice which controls the pressure,ie: putting your finger on a garden hose to increase the pressure.Small race calipers with small pucks can use a small MC(less area,less volume)large street calipers with large or multiple pucks need larger MC bores and resovires. By adjusting the size of the passing orfice(making it smaller) increases the pressure,usually in to increase and out to decrease on the race valves



So you sre saying that a propvalve is nothing more than a finger on the hose.
Dont get me wrong here i want to learn this but wouldnt the finger keep the caliper pistons from returning and drag the rotors?
Or is it a spring actuated valve of somekind?



It is like putting your finger over the hose BUT
with the brakes its going into a closed area(line
and caliper) SO the pressure will equalize on both
sides of the valve after a giving period of time.
All that valve is is a delay on the pressure... in
hyd, the pressure will equalize