Previously, brake bias was adjusted manually using a dashboard-mounted knob connected by a cable to the balance bar. Under heavy braking, tension in the cable often led to snapping and imprecision, making bias adjustments unreliable for the driver.
Goal:
Implement an electronically controlled balance bar actuator for safer, more reliable bias adjustments, packaged cleanly within the redesigned 2025 pedal box.
Solution:
I selected a servo-driven system producing 45kg·cm of torque and controlled via PWM from the car’s Power Management Unit. Key elements included…
- Voltage divider to step down from 12V to 5V PWM
- Coupler and Tilton 90° adapter to interface with the balance bar
- Integrated mounting behind the master cylinders
This system eliminates mechanical tension and improves the driver interface, enabling more precise brake bias tuning with less physical strain or mechanical risk.
Current Status:
System hardware has been ordered and waiting for installment. Testing is underway to validate the following…
- Increment of 1% front bias per use of CAN keyboard button.
- Driver usability during competition runs
- Servo repeatability and response under static loads
- Durability of coupler and adapter
