Well, there's only one way to find out isn't there?
I have carefully measured the temperature of the motor after driving continuous at 60 mph. The temp is consistently between 250F and 260F
measured with an infrared thermometer. I will install the new brushes and do the exact same drive and remeasure the temp. If the temp is less than the energy went into go-power instead of heat. I can easily get the brushes at $225 and do the experiment, I just wanted to save everyone some cash. Kind of that whole "work together community thing".
What confuses me is that we have 2 sets of empirical data which had the exact same outcome within 1%. There is NO data showing a brush change had no effect. Yet folks refuse to believe the data that has been collected. Instead you make several undocumented assumptions:
1. That your motor is already 85% efficient. Try more like 75%. Add 18% and you get up to 88%. Not bad. My motor is putting out WAY too much heat to be anywhere close to 85% efficient. Personally I am not very impressed. at all. In fact it is lame.
2. That 13% of 20hp could not POSSIBLY be released as heat. That is only 2.6 hp. I am not going to bother putting all the math on here, but that is entirely possible. Remember that heat moves FASTER the bigger the heat differential. So if I am getting 250f on a 60f day that is a 190F heat differential which is A LOT. Now we are probably only using about 16hp which would be about 2hp in heat. Again, completely possible if you bother to do the math. (please remember the comm is copper which moves heat very fast).
3. That Jenifer Aniston wouldn't marry a fine fellow like yourself. Step 1, you have to BELIEVE. Step 2, well, good luck anyway...