[coolhandcountry]

The 7xl has a rotor about 45 mm long. the 8L has one about 30mm long. That is where the torque difference comes in. It runs cooler for the fact that it is longer and has more surface to air contact to disapate the heat better. I would say the run times are going to be about the same really. But the power is much beter on the 7xl.