Need help, Open to suggestions

[Bondonutz]

I want to get a new motor for my Hyper 9E Buggy with a lower KV and I'm torn, I'm currently running a 1515 1Y/2200KV

Here's what I'm considering;

NEU 1512 3D 1700KV
OR
Tekin 1700KV

I'm open for different suggestions if anyone has one for different KV's ???

FYI- Running 4s with a 40T spur, My local tracks are small so 40ish MPH max is all thats needed.

[BrianG]

Why not just gear down a little? Are you just looking for lower speed, or is the 1515 a little too torquey for you?

Other than that, either of those would be good choices, although I personally would opt for something with a little bit higher kv, like between 1900-2000. 1700kv on 4s is only around 25k rpm, which is fine I guess, I just prefer between 30-40k rpm on the better motors.

[Gary NJ]

I'm running my Tekin 1700 at 19/40 on 4S, and I like how it runs.

[Bondonutz]

Originally Posted by BrianG

Why not just gear down a little? Are you just looking for lower speed, or is the 1515 a little too torquey for you?

Other than that, either of those would be good choices, although I personally would opt for something with a little bit higher kv, like between 1900-2000. 1700kv on 4s is only around 25k rpm, which is fine I guess, I just prefer between 30-40k rpm on the better motors.

Mr. B.,
The smallest Pinion I can run is a 13T, and the tolerance of the fit is very tempermental between to loose of a mesh or rubbing on parts. I had to file fins off a perfectly good new NEU to get the 13T pinion on.
The 1515 1Y runs well and doesn't over heat but I inspire to have cooler temps and the lower KV should achieve this ,yes ?
I have no problem purchasing a new motor, The 1515 1Y will find it's way into another Revo anyway I just want a Lower KV mill to have some gearing options and with the lower KV motor I can run 5s also if I wish, I hope ?
The diffs are geared 43/11, If getting what I want and need requires me buying another motor I'm fine with it, I want my buggy perfect.
With this being said, would you still recomend 1900-2000 KV Mr.Brian, ?
I respect and appreciate your input and suggestions sir, after all I still have a LOT to learn.
Thank You

[Cain]

Reason he can't gear down is that there is limited gearing room on the Hyper 9E with the Neu and Tekin sized motors. I would say that the Tekin 1900Kv motor would be a good choice or if you want a Neu motor you could look into the Neu 1512 2050Kv motor, if you are looking into the later drop me a as I have one I am not using recently serviced. You trim the lower fin and you probably can gear to a 13T pinion I am thinking.

Or, you could do a 3S setup with your current motor. That should work really well too and I have heard of others doing it.

[Bondonutz]

Originally Posted by Gary NJ

I'm running my Tekin 1700 at 19/40 on 4S, and I like how it runs.

Hows the top end ?
Nice cool temps ?
What Buggy is this in ?

[Bondonutz]

Originally Posted by Cain

Reason he can't gear down is that there is limited gearing room on the Hyper 9E with the Neu and Tekin sized motors. I would say that the Tekin 1900Kv motor would be a good choice or if you want a Neu motor you could look into the Neu 1512 2050Kv motor, if you are looking into the later drop me a as I have one I am not using recently serviced. You trim the lower fin and you probably can gear to a 13T pinion I am thinking.

Or, you could do a 3S setup with your current motor. That should work really well too and I have heard of others doing it.

I appreciate that Cain, I may consider that. But with my thinking If I go to the lower KV 1700-1800KV I can run a bigger pinion and have the top end I need with out cramming the motor so tight to the center diff assembly ?
I dont Know, I get what I think is a good idea and confuse myself by thinking to much ?
I want to stay away from the 3s, I have one only and don't wish to purchase any more. I just dropped another 400.00 on several HC 4s packs.

[SpEEdyBL]

I have the Tekin 1900 and I can't imagine a motor that is better than what I use it for. On 4s I can gear it up to 20/46 in my 8ight with temps barely hitting 140f, but typically a 14-17 tooth pinion is enough for most tracks with temps between 110-130. The equivalent pinion in the hyper 9e is about a half a tooth larger than that in an 8ight. 16/46 in the 8ight should be just short of 40mph.

One thing about the Tekin 1900 is that it is Y wound which means it is slightly more efficient than D wound motors and responds better to changes in timing. I stick with zero timing, but if I want a little more punch and rpm, i could just bump up the timing a little. You can't really do that with D wound motors.

[Cain]

Originally Posted by Bondonutz

I appreciate that Cain, I may consider that. But with my thinking If I go to the lower KV 1700-1800KV I can run a bigger pinion and have the top end I need with out cramming the motor so tight to the center diff assembly ?
I dont Know, I get what I think is a good idea and confuse myself by thinking to much ?
I want to stay away from the 3s, I have one only and don't wish to purchase any more. I just dropped another 400.00 on several HC 4s packs.

You are spot on with your thinking. I think that is why the 2200Kv is somewhat popular on 3S as you get more gearing range, and , its a good motor for the money. Ideally more voltage is better for sure.

I don't think you will have a problem with your KV range, from what I have been reading, seems some of the RTRs are coming with motors in the 1800Kv range now on 4S usage.

[Bondonutz]

Originally Posted by SpEEdyBL

One thing about the Tekin 1900 is that it is Y wound which means it is slightly more efficient than D wound motors and responds better to changes in timing. I stick with zero timing, but if I want a little more punch and rpm, i could just bump up the timing a little. You can't really do that with D wound motors.

Pardon my ignorance, Whats the diff between Y wound vs D wound.
Please explain ??

[BrianG]

D is short for Delta and means the coils are arranged in a triangle formation, with the motor wires at the corners.

Y is short for wye and means the coils are arragned in the form of the letter Y, with the motor wires on the ends of the Y.

[Bondonutz]

Thank You for explaining Brian.
Heres the set up as to why I'm considering the much lower KV motors, Whats your final suggestion sir about what KV I need be sticking with ??