If my calculation is correct, u are using 7.04 Final Drive Ratio (FDR), can be lower for 8.5T, of course depends on your drive style, track ....
(my calculation is-->
internal ratio = 34T/20T = 1.7
final ratio = 116/28*1.7 = 7.04)
In my case, TeamPower 7.5T, 108/33 FDR 5.56, motor at 40 degree, not hot.
u can go down to 6.X, u need to test yourself and monitor the temperature of ESC and motor |