After bleeding the brakes on November 12th, the brake team performed calculations to determine the force applied on the brake rotor. Through confirmation from the pedal box team, a 6:1 ratio was determined for the brake pedal lever.
Using this information and the size of the master cylinders, it was determined that a pressure of 1429 psi would be reached in the brake system when 150 lbs was applied to the brake pedal.
This presented a problem for determining the appropriate pressure switch. The majority of the pressure switches on the market for automotive uses are typically rated for a 750 psi burst pressure, which is below the required 1500 psi based on the calculations.
After researching and not finding a common pressure switch with the required maximum burst pressure, it was determined that an automotive grade pressure switch would be sufficient despite its low rated maximum pressure.
Moving forward, the brakes team will submit a purchase order for new pressure switches. After the order is completed, physical work on the car completed. The brakes team will be working with the pedal box team to relocate the brake lines for ease of maintenance and installation of the new pedal box. The brake line running through the cockpit will be moved from its current location at the the floor of the roll cage to the top of the side wall. This will make bleeding of the brakes easier and reduce the risk of air bubbles being trapped in the brake system by reducing the overall elevation changes of the brake system.