Neu Motor Recommendation

[kazuaki]

I'm planning on running an EZRUN 60A esc and Neu 1100 series motor in my 1/16 E-Revo. My intended use is general bashing on 2-3S and speed runs on 4S. From my research, I think the 1110/2.5D is the correct choice for my intended use and cell count.

1) Does my motor choice seem correct?
2) Any better suggestions for the motor, assuming I am locked into this ESC and a max of 4S?
3) Where can I actually buy this motor? I haven't found it anywhere, other than special order direct from Neu.

Thanks

[killajb]

Try here: http://www.espritmodel.com/index.asp...OD&ProdID=7843

If you plan on running up to 4s, I'd opt for the 1.5Y. I have the 1115 thats rated at 5700kv and it's waaay too nasty power-wise. Still, it doesn't heat up too much on 3s with a fan and heatsink. Ideal motor IMO would be the 1110 1.5D with a max voltage of 3s.

[kazuaki]

So, the 1.5Y is 3025Kv. When I did my calcs, I figured a max 4S voltage of 16.8 volts (is that right?), which would put this motor at a theoretical max of 50,820 RPM. At the same time, when I play around on 2S, it will only top out at 25K RPM. Is that going to make it a dog on 2S, or do I just gear it up and hope it's got plenty of torque?

I'm new to custom motors where you can select the KV rating. I just assumed you'd want the max RPMs at your max voltage. Am I going about this wrong? Honestly, the motor will spend 75% of it's time on 2S, but it needs to be able to handle the 4S as well.

[suicideneil]

Generally speaking, with the larger motors we aim for about 30-40,000rpms on the selected voltage, as this is the most efficient range. Same general rule applies to smaller motors, though they can spin faster as there is less rotating mass so the rotors are less likely to fly apart at high rpms. Running very high rpms all the time isnt all that good for the bearings mainly, even if they are rated for 60,000rpms- you end up having to gear down a whole ton to acheive usable speeds.

I would aim for a ~3000kv motor, that way it will be good on 2s and 3s lipo- 4s is probably overkill for such little vehicles, but then again its worth reading around.

[kazuaki]

OK, so that points back to the 1.5Y, which is 3025kv. So, this motor is considerably different from the 4000kv VXL stock motor. I'm assuming I will run much taller gears with the Neu to make up for that difference, correct? It should have a lot more torque than my VXL?

Let me put it this way, the 1.5Y and the 2.5D should both push the truck to about the same terminal velocity if I gear each correctly, right? I just don't want to make the investment and find out I chose unwisely.

[kazuaki]

Originally Posted by kazuaki

OK, so that points back to the 1.5Y, which is 3025kv. So, this motor is considerably different from the 4000kv VXL stock motor. I'm assuming I will run much taller gears with the Neu to make up for that difference, correct? It should have a lot more torque than my VXL?

Let me put it this way, the 1.5Y and the 2.5D should both push the truck to about the same terminal velocity if I gear each correctly, right? I just don't want to make the investment and find out I chose unwisely.

Can any of you more experienced guys confirm I am understanding this correctly? Does the KV rating really affect the power of the motor and the ultimate speed I will able to reach? Or does it merely affect the gearing I use to reach that ultimate speed?

It is better to have a lower KV, higher voltage setup as you will end up with a more efficient system. The problem is you are trying to cover an extremely large relative voltage range.

I would expect to maybe get a motor capable of running at 2s and 3s comfortably, but you are asking a lot to have it run safely at 4s too. I would say to get a motor that will be happy to run at 4s all the time, low kv, and just gear it for the speed you want. It makes more sense.

I run my slash 3s all the time. Just geared 19/86 for backyard bashing and geared 26/83 for on road speed kicks.

[zeropointbug]

Originally Posted by kazuaki

Can any of you more experienced guys confirm I am understanding this correctly? Does the KV rating really affect the power of the motor and the ultimate speed I will able to reach? Or does it merely affect the gearing I use to reach that ultimate speed?

For a given motor, regardless of Kv., it's the RPM that determines the power output, for example:

1515/1Y(2200kv.) @ 4s lipo = 32560rpm

1515/2Y(1100kv.) @ 8s lipo = 32560rpm

Both will have virtually the same power output (the 2Y will have slightly more because of higher efficiency from the higher voltage), but nothing noticeable.

[kazuaki]

So, sounds like the best option might be to get the 1110/1.5Y and run 4S for speed runs, but maybe run 3S (instead of 2S) for bashing. I guess I should optimize the power for the speed runs, where ultimate power is critical. Even the stock setup has more than enough power for bashing, so I guess I shouldn't worry about that so much.

Thanks for the help guys, I'll be ordering the 1110/1.5Y/3.2.

[kazuaki]

Well, I saw the small price difference and made a last minute change to the 1112/2D. I couldn't help myself

[BL_RV0]

MORE POWER!!!!!

I just finished mine with an 1110/1y with MM esc on 3s with stock gearing and its 100+ outside here in austin texas ....after making speed runs up and down street 5 or 6 times and motor was 108 and esc was 127
...yeaaa finally remembered my password on here ..lol

[magman]

Originally Posted by austinmaxx

I just finished mine with an 1110/1y with MM esc on 3s with stock gearing and its 100+ outside here in austin texas ....after making speed runs up and down street 5 or 6 times and motor was 108 and esc was 127
...yeaaa finally remembered my password on here ..lol

That is one tight compartment

I am making a little esc mount, that will move the esc over the rear shocks like i have on my 3.3 converted e-revo, it will give the esc more protection and make it cleaner looking....the neu is actually shorter then the stock motor and is slightly larger diameter than stock and the esc hangs over side 1/8 inch or so (which bugs me)

[suicideneil]

Bah, details details. Seeing an MM and Neu in a 1/16 truck is all kinds of win