This is a reminder...
please include the kv specs of whatever motor you are asking questions about. It makes it easier for everyone who responds, so we don't all have to dig and find the kv.
FWIW, I normally keep a tab open to Neu's site and link to Feigao specs because I can't memorize specs of every motor.
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+