What is your cooling scheme for the motor and battery? I see what it is for the ESC.
If you took the battery and submersed it in a bucket of water it would run the same tempter as if it were in open air.
The heat is generated by friction of electron molecules, The motor cools from residual air behind the spinner and will exit in a some louvers in the cover.
Many RC guys are experiencing tempters between 140 and 160 with no problem. We are not taxing the batteries like they are either. All you have to do is look at a RC electric plane and find no special cooling built in to figure out maybe we are over amped about cooling. If I am wrong (bet I am not) I will post the results.
I have learned this from the Viper tests. I have small openings and no special deflections to cool anything and the temps are way low, rather cool really.