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Tech Talk with Master Power Brakes

Calculating the Right Brake Pedal Ratio

Posted by toby on May 21, 2015 11:10:24 AM

Whether your vehicle has power or manual brakes, pedal ratio is important.  If you are experiencing a hard pedal you should check your pedal ratio if you have converted from the vehicle’s OE set up.  As a general rule, your pedal ratio should not exceed 6:1 for manual brakes with a 1” bore master cylinder and 4:1 for power brakes with a 1-1/8” bore master.

pedal ratio calculations

calculating power pedal ratio

calculating manual pedal ratio

pedal ratio tileWe've posted a PDF that summarizes how to calculate the pedal ratio for power and manual brake configurations for your reference.  Feel free to download it and print it out for handy reference before heading out to the garage.  As always, if you have additional questions, feel free to give us a call at 1-800-381-9772 or drop us a line and we'll be glad to lend a hand!

 

Topics: brakes, classic cars, How To Series, pedal ratio, Vintage Cars, manual brake pedal ratios, power brake pedal ratios

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