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Old 11-08-2020, 10:10 AM   #56
Pcormier66
 
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Drives: 2019 ZLE
Join Date: Jul 2020
Location: Dallas
Posts: 157
You're absolutely correct - it's physics. And yes there are a multitude of variables that contribute. Weight of car, HP, tire composition, track configuration, changing track conditions during a run, driver skill, caliper design, backing plate stiffness, length of the run session, proper bedding of pads to rotors, fluid condition... + 1,000 more variables

This discussion is about how changing the coefficient of friction (pad choice) affects heat creation - all other things being equal. If you want to debate every possible variable, then this is an infinite discussion. My explanation is based on a ZL1 and how pad composition influences heat creation. We are only changing the pads. We need to simplify this experiment

Clamping forces and the coefficient of friction are on one side of the equation, and brake torque is on the other side. If you increase either variable, you are changing the amount of torque the system can generate.

The clamping forces are used to generate friction that produces torque to stop the vehicle. This is where “coefficient of friction” comes into play. The coefficient of friction is calculated by dividing the force required to slide an object over a surface by the weight of the object. For example, if it takes 1 lbs of force to slide a 1-lb brake pad over a rotor, the coefficient of friction between the two materials is 1.0.

Clamping forces and the coefficient of friction are on one side of the equation, and brake torque is on the other side. If you increase either variable, you are changing the amount of torque the system can generate.
https://www.knowyourparts.com/technical-resources/brakes-and-brake-components/from-pedal-to-pads-brake-systems-explained/

All things being equal, a higher torque pad will require less clamping force to generate the same coefficient of friction. There is a direct relationship between coefficient of friction and heat creation.
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