XRAY - Model racing cars

I'm considering World GT 1S and 10.T, as to EFRA regulations.
2S and 17.5T is an option too, again as to EFRA regulations.

My ESC is LRP SXX Stock Spec.
What engine 10.5T and/or 17.5T would you recommend for this esc and especially in this race class?

Looked myself of course on the internet, but there is so much out there.

At first I thought of a 10.5T LRP motor. But on there website it says that is a 1/12th motor.
Furthermore I heard of LRP motors having issues with heating. They tend to generate more heat than other motors?
World GT is an indoors thing, so that would be somewhat of a problem.

And as to 17.5T motor?

Any 540 brushless motor will fit in the car.

What is best for 1s or 2s?
the rules for each class will dictate what turn to use, any approved motor will work.