currently i am running a fegoa 540 8s on 3s lipo but its getting too hot for my liking and i think its because of the high rpm.
I have ordered a 540 7l which on 3s lipo would run about 39krpm which in my experiance fegoa motors tend to run cooler about the 40krpm mark.

From my calculations it should be able to produce the same power as the 8s just with more torque and less rpm which should hopefull help to keep the motor cooler.
Fingers crossed it will turn up this week then i will be able to report my findings in comparing this motor to the 540 8s in my losi xxxt.