Breaking Them In
The purpose of breaking in a new brake system is to burn off residual machining oils off the rotor surface, and relieving the internal stresses inside the rotor before subjecting them to extreme temperatures. Baer recommends easy street driving for the first 400-500 miles, with a minimum of 8-10 normal heat cycles. Zinc-plated rotors, like the ones on our Cutlass, require an additional 100-200 miles and 4-6 heat cycles. Next, it's time for the fun stuff. Baer suggests performing 10 partial stops at 40 percent pedal effort, slowing from 60-15 mph. This process should be repeated at 60 percent pedal effort. After allowing the rotors to cool with 10 miles of relaxed freeway driving, another 10 partial stops must be performed at 85-90 percent pedal effort. Once the brakes cool for several hours back down to ambient air temperature, they're ready to go.