In previous seasons, the rotors experienced significant brake fade during endurance runs, with rotor temperatures reaching as high as 900°F. After reviewing data from the pad manufacturer, I confirmed that the previous compound’s friction coefficient dropped sharply at high temperatures and wasn’t rated for racing conditions or steel rotors.
I reached out to our supplier, Willwood Brakes, and identified the BP-28 compound as a better alternative. It offered:
- A stable coefficient of friction across high-temperature ranges
- Compatibility with steel rotors
- A formulation specifically developed for open-wheel racing applications
Testing & Results:
To validate the compound, I ran stopping distance tests and performed an endurance-style mock testing session to simulate competition conditions. The results were clear:
- Driver confidence increased, particularly during long-duration events
- Rotor peak temperature reduced from 900°F → 730°F
- Brake fade was completely eliminated, even under repeated hard braking
- Improved thermal control and more consistent pedal feel
Data Collected:
Here are the MoTeC worksheets that I use to analyze the heat generated by the two different pad compounds.
