Revo BL Conversion questions

[Sammus]

At the same voltage (ie rpm), what would be the difference in having an 8XL and a 9XL geared for the same speed? would the 8 turn heat up more or something? this whole concept confuses me, I understand what BrianG said before, but what if the voltage is equal and you just change the gearing to make the speed of the truck the same.. surely the current draw would be the same and motors and electronics would heat up just as much?

[lincpimp]

Heat production appears to be based on two things. Motor effecientcy, and load. I feel that the feigao motors are best between 30k and 35k rpm. Inside of that rpm range gearing for 40mph seems to be the sweet spot for these motors (in a revo/maxx sized truck). As long as good quality batteries are used this wil be a good setup.

I prefer to run the motors near 35k rpm. This leads to lower gearing, and less load on the motor. Plus having a larger motor speed range and lower gearing seems to work better over that range. The 9xl seems to be a good 5s motor, I have one but have not tried it yet. It will do in my savage conversion on 5s. I have run the 7xl and 8xl on 4s and they both work fine for me.