What Does a Proportioning Valve Do | Wilwood Brakes

Adjusting brake bias on your hot rod or muscle car with an adjustable brake proportioning valve can be confusing. Do you even need an adjustable brake proportioning valve? How to adjust a brake proportioning valve properly? Where should a brake proportioning valve be installed? These are all important questions that need solid answers.

To that end we visited with Mike Hamrick from Wilwood Disc Brakes to get these answers and provide you with peace of mind when plumbing your project’s brake system. Being able to adjust brake bias with a brake proportioning valve, such as a Wilwood adjustable proportioning valve, allows you to adjust the amount of rear brake in your vehicle, which is affected by such things as brake system type, tire size, wheel diameter, and more. Adjusting a Wilwood brake proportioning valve right on the car makes for quick changes to accommodate track conditions, tire compound changes, and more.

When considering your Wilwood proportioning valve install, it is best to install one during the brake system initial plumbing versus attempting to add one to the system later. You may not need a brake proportioning valve now, but the only way to allow adjusting brake bias will be with one later.

Shop proportioning valves from Speedway Motors: https://www.speedwaymotors.com/shop/p...

0:18 Is a brake proportioning valve necessary?
0:44 How does a proportioning valve work?
0:56 How to reset brake proportioning valve
1:56 How to adjust Wilwood proportioning valve
2:48 When do I need an adjustable proportioning valve?