Make no mistake about it, most classic car enthusiasts like to go fast. We spend countless hours in the garage figuring out ways to go faster. Adding more horsepower guarantees you’ll impress your buddies and have a blast every time you pull away from a red light, but that extra giddy-up can cause some problems too.
A Combination Valve, sometimes called a Proportioning Valve, is just what the name implies…a valve that does a combination of things. The valves used on front disc/rear drum systems and front and rear disc brake systems include a Proportioning Valve and a Brake Pressure Differential Switch while the disc/drum valves also contain a Metering Valve. If you have ever wondered what all of this stuff does, we have just the video for you....
When it comes to brakes, you need think of a complete system consisting of components working together to stop your vehicle. As brake systems evolved from 4 wheel drum systems to rear drum/front disc combinations, the design of the various components making up the system changed in order to keep pace with the new technology. One of the best examples of this is illustrated by the changes in master cylinder design.
Most of our customers own cars that came with drum brakes as original equipment, and sooner or later, they need to make a decision about upgrading to disc brake technology. If you own a very rare, museum quality classic car that is 100% original, you can make a reasonable case for leaving things alone. That said, most of us are not driving factory original classics, and there are certain areas of the typical daily driver (e.g., air conditioning, suspension, brakes) that merit upgrades. You probably understand disc brake systems are safer and more efficient than drums, but do you know why? And, assuming you are looking for a disc brake conversion kit, should you upgrade front and rear, or the front end only?
A Combination Valve, commonly called a Proportioning Valve, is just what the name implies…a valve that does a combination of things.