Changing from shoes to disc does not make braking efficiency improve under normal circumstances.
The brakes are well calibrated and you should not be changing the rear to disc hoping that it would improve efficiency. The reason for disc is that it dissipates heat faster so the only time it would be different in efficiency is it does not fade as fast as a drum brake system and this occurs only when the brakes are used excessively.
If you are planning to use the car for racing purposes, then it would be the thing to do.
Saturday, June 16th, 2012 AT 1:02 PM