Hello. i have been running those babyes for 4 years now.
i always pick the top kv rated ones so i play with kb45 2300kv l can. and the bigger one kb45 1700kv xl. i bought them way back before they changed the kv to 1600kv for the xl version.
and the biggest problem people do is that they gear them to low and the will overheat because they have nothing to do.. you all know that running a brushless motor unloaded is a no go right ?
i run 10cells lipo in series trough 2300kv kb l version for speedruns and 5-6cells lipo for offroad and bashing. never has any problems.
i run twinforce and rustler and 1:8 buggy and truggy and revo and cen gst with those motors..
the big hw heatsink cooler for the 2000kv motor is great and the holes in the front and back is also good.
No offense but i think you guys in here run weak setups
. but its the place with the most info in one place. i run up to 9cells lipo in series in the neu mamba 2200kv motor. stil dont think it is as sharp as the kb 2300kv L
the bigger 1700kv xl is easyer to handle because of lower rpm and it really does a nice job in rustler as a speedrunner.
i prefer hobbywing plane esc and i dont run the pistix as it gets to sick. i use rubber band and gets a full travel on the remote and then its easyer to handle.
the 40k rpm limit is for the nitro guys.. we run eletric and the fun starts at 70.000k rpm
so please put some more lipos in your rc cars :)
best regards from denmark