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Description:
Brand new GM style Disc/Disc self-adjusting proportioning valve with zinc coated finish. This valve is also called a combination valve, as it performs all of the necessary valving functions with a disc brake conversion. These functions include the following:
Proportioning:
As more force is applied to the brakes and the car begins to lean forward, less braking force is needed in the rear. This valve decreases the pressure to the rear, preventing lock up.
Metering:
Metering is used in the front disk brake portion in the disc/drum system to delay application of the front discs allowing the slower reacting drum brakes to catch up. This provides rear stability on wet surfaces and helps prevent front pad wear. There is no metering function with the disc/disc setup.
Residual Pressure:
Drum Brakes require residual pressure of 10 lbs. to be held in the line. This pressure keeps the brake shoes close to the drums giving you a more firm pedal feel. The disc/disc setup does not require this pressure.
System Failure Switch:
This valve has a system failure switch that will alert you when half of your braking system is not working properly.
Also included in this kit are (Two) 2 pound residual valves. These residuals prevent loss of brake pressure. They run in-line and act as a one way check valve and prevent fluid from bleeding back to the master cylinder. These valves are a MUST have when mounting your master cylinder under the floor.
These valves usually list for $160 total, you're getting the set here for almost half price! This is a must for any disc brake conversion or power brake upgrade.
PV4 + (2) 2# Blue Residual
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