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What if a fella wanted to take the motor out of his e Revo 2.0 and put it in the Kraton? Would that be stupid? And can the Kraton eSc deal with the Revo motor or would that have to be changed ?
The 4000 Kv motor is faster - at the same voltage. The 4000 Kv in the BLS models are rated for 2s (7.4v) while the 3600 Kv motor in the BLX is rated for 3s (11.1v).
4000Kv x 7.4v = 29600 RPM
3600Kv x 11.1v = 39960 RPM
The higher the RPM the faster top speed.
Can you help me understand. The wisdom I have heard is volt up, gear down. Meaning to gain performance gear your vehicle lower and use a higher voltage setup to achieve more performance. Logically this is using gearing and input to reduce the load on the system.
For these Arrma trucks I am confused a little. As I understand to make the truck run cooler you use a lower Kv motor and gear up. Only thing I can figure is that volt up refers to voltage applied to the system not the motor itself. By using a motor with lower kv and gearing up you’re actually reducing load by utilizing a motor with more torque that can handle higher gearing with less stress or load and still achieve speed/performance similar to a high kv motor geared moderate to high.
You have a pretty good handle on it. One other thing to notice, is that when people buy lower KV motors, they will often get a bigger can size - so the motor can make more total power. And one last (sometimes overlooked) observation - the truck takes the same Power (watts or HP, which every you prefer) to go 50mph regardless of motor size, voltage, gearing, or whatever. So if you have two motors - one is running at 95% max power to get the car to 50mph, and another that is running at 50% max rated power, guess which will be running cooler and have a longer life?
You have a pretty good handle on it. One other thing to notice, is that when people buy lower KV motors, they will often get a bigger can size - so the motor can make more total power. And one last (sometimes overlooked) observation - the truck takes the same Power (watts or HP, which every you prefer) to go 50mph regardless of motor size, voltage, gearing, or whatever. So if you have two motors - one is running at 95% max power to get the car to 50mph, and another that is running at 50% max rated power, guess which will be running cooler and have a longer life?
Excellent thank you! So in your example a 1600kv motor geared higher to run the same top speed as the stock 2050kv would be cooler (less stressed) assuming same can size?
Seems to me many folks change to a lower kv motor. Arrma has to use a higher kv motor stock so the marketing dept can put a sexy top speed on the box but it isn’t necessarily ideal for keeping temps low for most users.
In your example, I think the answer is NO. For otherwise identical motors, the lower KV motor (generically) has a lower max power vs a higher KV motor. So to get the same "Actual" power, you must run it at a higher % of max output. But there are so many variable issues that it is hard to put a fine point on in.
And yeah, some people change to a lower KV motor. Some people change to a higher KV motor. Everyone has their preference. Gear it right, and it will work.
As for Arrma Marketing, yeah, that 60mph is not for general use, but just for short speed runs on pavement. the 2050kv motor is pretty much in line with (+-150kv) what 90% of 1/8 RTR cars run, so I don't feel it is a marketing 'trick' either. The motor is solid, you just can't expect to run it (or any motor) near max output without overheating it. If you really want to run 60mph, offroad, for a full battey without heat issues, you need a much LARGER motor, not just a lower KV one.