What are the main differences between the three types of brushes?
The graphite brushes are not really recommended for racing. They have the lowest comm wear, lowest brush wear, high lubrication and the lowest power. The copper brushes are recommended for modified racing. They have the medium comm wear, high brush wear, lowest lubrication and medium power. The silver brushes are recommend for stock racing. They have the least amount of resistance. The have the highest comm wear, medium brush wear, medium lubrication and highest power. Are there different shapes of brushes for stock and modified? Yes, stock brushes are a laydown brush they are wider than a standup brush. The purpose of the laydown brush is to get maximum wrap around the comm to increase the RPM and are usually thicker than a modified brush. Modified or standup brushes are taller than a laydown brush. What is timing? A motor’s timing is the position o its brushes relative to its magnets. When brushes are perfectly centered over the magnets, the motor has zero timing. When you rotate the
