I am running a fan cooled 8xl on 4s li ion in my hyper 7 and I am using 13/44. It is has gotten to 150 F without the fan.
I like 13/46 the best but I cant find any 46 tooth spurs for some reason.

IF ANYONE KNOWS WHERE TO GET THE KYOSHO IF 148 PART IN THE USA PLEASE POST A LINK.
Thanks