The valves were set to work with "hot" brakes. If you set the valve to make the brakes effective when cold , they will lock up FOR SURE if run at a competitive event where they see heat. "Street driving " is not enough.
In drag racing , I ride the brakes when smoking the tires before the starting line. The holding power on the starting line is far better with the rear brakes heated and stopping at the end in great too.