Kv confusion?

Old 02-18-2016, 08:35 PM
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Default Kv confusion?

I'm pretty sure I have a decent understanding of what kv is. (RPM/volt)
I was looking at the thread about what kv is used in 1/8 buggy and truggy. For some reason people say that the most common for buggy is around 1900 and 2250 for truggy. I'm confused because if truggies are heavier then wouldn't they need the lower kv for more torque, which in turn gives less top speed? Help me out of I'm wrong.
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Old 02-19-2016, 05:06 AM
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Frequently the truggy motors are a longer motor, that provides more torque. For example the popular Tekin T8 truggy 2250 & 2000kv motors have a 77mm long can. The T8 buggy 2050, 1900, & 1700kv cans are 69mm long.
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Old 02-19-2016, 06:48 AM
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Thanks, I was wondering that too
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Old 02-19-2016, 01:54 PM
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1/8 buggies are typically ran on 4S batteries so twice the voltage results in roughly half the Kv needed which in turn produces similiar speeds to 2S but much more "power". Only do super light buggies (like the MIP Pro8) run on 2S needing a higher Kv motor 4000-4700Kv.
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Old 02-19-2016, 04:17 PM
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You also have to consider where you plan to run your vehicle (i.e. the specific track, layout, size, etc.). Ex. 1700kV is a popular kV for buggies because many tracks aren't that big, so there's no point in using a higher kV motor to get more speed that isn't needed and likely will be more difficult to control (have to control your throttle more carefully). Those small-medium tracks also aren't as popular for truggies due to the size (bigger vehicle on a smaller track). Truggies tend to be more popular at larger tracks where more power and speed can be used. Also, people tend to see truggies as better bashing vehicles due to more ground clearance and overall better versatility for more terrain types and bashers tend to like more speed (and have the area to use it), so higher kV.
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Old 02-20-2016, 10:38 PM
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Originally Posted by Dave H View Post
Frequently the truggy motors are a longer motor, that provides more torque. For example the popular Tekin T8 truggy 2250 & 2000kv motors have a 77mm long can. The T8 buggy 2050, 1900, & 1700kv cans are 69mm long.
Thanks so much, I think I get it!
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Old 02-20-2016, 10:39 PM
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Thanks everyone for all the help, I appreciate it.
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Old 02-22-2016, 07:30 PM
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Originally Posted by aaldrich1027 View Post
1/8 buggies are typically ran on 4S batteries so twice the voltage results in roughly half the Kv needed which in turn produces similiar speeds to 2S but much more "power". Only do super light buggies (like the MIP Pro8) run on 2S needing a higher Kv motor 4000-4700Kv.
You mean 1/8 buggy runs on 4s (which I knew) but 1/8 truggy doesn't??
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Old 02-22-2016, 08:36 PM
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Originally Posted by shirillz731 View Post
You mean 1/8 buggy runs on 4s (which I knew) but 1/8 truggy doesn't??
4S is typical for 1/8th Truggy too, though some people run 5S or 6S and correspondingly lower KV motors (like 1350KV on 6S).
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Old 02-26-2016, 04:45 AM
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Originally Posted by ta_man View Post
4S is typical for 1/8th Truggy too, though some people run 5S or 6S and correspondingly lower KV motors (like 1350KV on 6S).
Okay thanks, I knew something was up, no way 1/8 truggy ran on 2s lol. I think I will start racing with either 1/8 buggy or truggy.
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