Wow, that would be a hot motor on 4s!! I like it.
Seriously, for 4s I would go lower on the kv... unless you are looking for a speed run car. I ran a MM 4600 on 4s and easily hit 70mph in my 1/10 buggy. It makes retarded amount of wheel speed and power, hee hee.
Jammin CRT MM/Neu 1515 1700kv
Losi 8IGHT MM/Neu 1512 1900kv
Kyosho 777
T4 MM 5700
B4 LRP
XX4 MM 7700
old losi xxcr, MM4600 4s lipo 70mph+