Save My Insanity!!

[Nard Cox]

Originally Posted by lincpimp

Motor speed is low on the 1518 on 4s... blabla ... Motor rpm needs to be in the mid 30k rpm range for good performace when gearing a heavy MT for 40+ mph.

I agree with the last part, so that's why 5S is also valid option (33.300rpm @ 3.7v). The 1520 and 1717 would be better off with 6S.

(very) General rule of thumb:
2200kV< = 4S
2000kv = 4S / 5S
1800kv = 5S / 6S
1600kv> = 6S

For some reason I don't like running things on the edge of their capabilities like 6S, though I think I'm going to with my 1717 in my Savy XL.