If you are still running a brushed motor on your SC10 (or any RC vehicle), you need to start thinking about upgrading to a brushless setup. Prices for brushless motor + esc combos have decreased dramatically and the advantages of a brushless motor are worth every penny.
The main advantages of brushless motors are less maintenance, more tuning options, and better performance over the life of the motor. We all know that brushed motors can be a pain to take care of, whether it is cleaning them out, replacing brushes, or cutting the comm. We also know that if you do not do maintenance regularly, your brushed motor will lose performance. With a brushless setup, you are virtually throwing maintenance out of the window. Your brushless motor will perform the same way, run after run.