That's good to know. I always suspected that the tune was causing overheating. Now that you have isolated the problem you can work on fixing it with Usman.
The brakes are garbage on the Civic 10th Gen. After multiple high speed runs they just completely give up and if you keep applying the brakes with pressure you end up warping the terrible rotors.
And lastly, even with the CVT cooler you are not supposed to go over 250 lbf/ft. You'll risk blowing the transmission to smithereens.