I have been using a 1/10 4300kv ezyrun motor on a 7.4v lipo in my hsp 1/8 brushless buggy with the standard 70amp esc for the last 3 race meetings and the setup has been working fine and motor temps sitting around 65-70c but the esc is not adjustable so i thought i would try the MMM i have.
The buggy is not quite as fast as the nirto's but i have been getting podium wins in my class in sports buggy against them. So i think if its done corectly and you are carful and are not going for total speed as im not its just good fun to beet the nitro guys at there game even with a slower electric.