I agree with most of what 3B says about the need for the residual pressure valves, except for the fact that they're only needed with a MC on drum brakes that was mean for a disc/drum, disc/disc circuit.
Regardless of what the MC was made for (dr/dr, di/dr, etc), IF the MC is below the floor, or below the wheel cylinders, it needs to have 10# residual pressure valves. If its below the wheel cylinders, then theres a chance that fluid will drain away from the wheel cylinders... resulting in what 3B described above.
In my opinion its a necessary safety precaution
Last edited by GMJager; 03/31/2015 12:45 PM.
