On my daily rampaging 6S build, i’ve used 245s and 270s. That seems to be the common acceptable pairing for 6S. However I just went to spec parts for a potential customer who only has $400 to spend and found myself with this question:
What kind of results can I expect by using a 170kv on a 6S battery with a 6-8S ESC? Overheating? Weird performance? Will it even matter? Given the unreliability of availability of good motors at low low prices, it can be difficult to always ideally match the kv factor with the S factor when trying to help a brother out.