Higher KV motors provide higher speed on the eSK8 calculator and there was a thread by @chaka back in May 2016 claiming that the ideal KV for my 9s (33.3V) battery setup is ~ 257k according to the formula of 8570rpm/33.3V (voltage of batteries according to Hobbyking specs).
I’m looking to change the motor and get a SK3 6374 192KV according to advice I’ve received so far but wonder if I should opt for KV 6364 245KV according to Chaka’s post so that I hit closer to that ideal range and have a higher top speed.
Will I have enough torque with the 6364 245KV?
If I don’t have enough torque, can I get away with giving the board a push-start?
But why? there are a fair amount of people, most of whom are very experienced based on their contributions to this forum and builds, who provide conflicting figures. The only one that’s been explained is Chaka’s post about the ideal KV to battery voltage (though I appreciate he doesn’t delve into torque requirements, hence my question).
Why is 192KV best for a 95kg man like myself? can I not make do with a higher rated KV? Could I go higher but need to provide the board with a push-start?
I weight about 70kg and use a 430kv motor. This is way to much top speed and way less torque. Sure you can increase the kv but then need a push start. But if this isn’t a problem you can go with a 245kv motor instead of 192kv. But the torque won’t be better since the 245kv one is shorter and has more kv
I am only saying, that with a 192KV motor you still get good speed for regular commuting, but also have the torque for a standing start. Not to mantion, that maybe in the future you will want to go 10-12S, and for that voltage 245KV will probably be too high.
How fast do you want to go?
Just asking because 192KV on 9s can get you up to more than 35km/h. If you want much more, and don’t mind starting with a push, you can get the 245KV, it’s your choice.
Are there any smaller hills or inclines near you?
If yes, that might be another reason to go with the lower KV.
Instead of buying that motor on hobby king perhaps you could join our group buy…its exactly for the same motor but it is being bought directly to the manufacturer (no hobby king intermediates) and therefore you can save a few dollars.
you can get as much torque from either it’ll just take more amps from the 245kv. if you want low speed torque you can also adjust the esc motor amp setting. id just get it and you wont have a problem with the adjustability of the esc or cogs if need be.
Unrelated to your motor question, but just so you know, you will probably need to cut off a piece on both sides of your hanger if you’re going with caliber trucks and enertion wheel pulleys due to them having an integrated bearing.
I’ve been looking, I’ll need to see if I can get my hands on the right tools. Checking @longhairedboy’s builds to see if he mentions how much to take off (roughly).
