Pedal Ratio Calculator
Vehicles equipped with factory power brakes is typically 4:1. Manual brake applications use a recommended ratio between 6:1 or 7:1.
CPP BRAKE RATIO AND HYDRAULIC CALCULATOR
There are several factors to acheive effective brake pressure to supply your calipers in order to have the proper braking performance desired for your calipers. The 3 important onces are Pedal Ratio, Bore Size (Fluid Volume output), and Brake Pressure (determined by the pedal ratio, master cylinder size, and effort from the driver).
The following calculators will help build your optimal brake setup.
*Note: The calculators below do not account for other variables like rotor size, brake pad formulation, or caliper design or function.
Master Cylinder Area (sq. in.) Calculator
Fluid Requirement By Your Brake System
*Note: Larger calipers use different sized pistons which may require you to do this calculation for each piston separately and combine the results for overall Fluid Requirement.
*Note: Brake Pad movement varies from one system to the next depending on style of caliper and kit. Most calipers move between .01 and .03 at operating pressure.
Master Cylinder Line Pressure Calculator
*We recommend a normal operating pressure of 600-800 psi and 900-1200 psi during hard braking
*Recommended max achievable pressure of 1200psi
*Typical input force is between 60-90 lbs of force by average weight and size driver. Under hard or panic conditions, force can be between 100 – 120 lbs of force.
Master Cylinder and Pedal Travel Calculator
*Note: The larger the master diameter, the higher and harder the pedal feel becomes. The smaller bore master cylinder will produce a softer pedal with more modulation but a longer pedal travel.
Calculate Master Cylinder Fluid Output (Cu. In.)
*Note compare this to your fluid requirement to determine adequate fluid volume is available for your braking demands. Output needs to be greater than requirement below*