Re: BRAKES: Easamatic Power Brakes aka Bendix Treadle-Vac--Change or Not??

Posted by PackardV8 On 2009/5/19 9:05:01

The smaller the piston then the less effort required by the foot. BUT the foot must travel a longer distance to displace a fixxed amount of fluid at a fixed pressure. So that is why the 1:1 RATIO works.

Put a larger piston in the bore and it becomes more difficult to push the pedal so the pedal ratio must afford more leverage to displace the fixxed amount of fluid at the SAME pressure.