Marcooch This all depends on what you like. I personally like to mix it up and swap motors/esc’s around. if you just want to do a motor upgrade without the need to buy a new esc, esc fan, transmitter and receiver then stick with the 3100kv. It’s plenty fast and has lots of torque. If you want a little more speed and you don’t mind buying all new electronics then by all means, get the 3930. The problem is the stock esc is it has no cooling capability.

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Marcooch Oh, I just remembered that I also have a surpass hobby 2845 3800kv. I used this motor in my q with the stock esc briefly. The esc actually held up pretty good with it. The 3800 is nice also. A little more torque than the 3930 and a little less speed. If I were you honestly I would get the 3100kv and see how you like it. I don’t think you will be disappointed with it.

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Marcooch One more thing if you do decide to upgrade all the electronics your led lights will not be compatible. The plug will not work and also the lights will burn out if you do make a harness to plug it into a receiver. They will not handle the BEC voltage from a regular esc/receiver set up

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BG428813438 Obrigado irmão vc me tirou rodas as minhas dívidas com esses motores eu vou comprar 3100kv mesmo obrigado Por tudo 👍👍👍

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BG428813438 vc me tirou todas as minhas duvidas obrigado👊

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Marcooch No problem buddy, good luck!!

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BG428813438 obrigado irmão pra vc também👍👍👍

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BG428813438 irmão boa noite meu ESC 35 aguentar esse motor 3930kv

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ShMarco What’s up brother, the stock 35a esc will run the 3930 motor but the problem is you have no way to cool this esc with a fan so that might cause a problem. I like to experiment with my rcs. Change things around, try out different set ups. Just get the 3930 motor and run it and see how the esc does.

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BG428813438 ok irmão como sempre muito atencioso muito obrigado pela dica👏👏👏

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ShMarco No problem man, no problem at all.

After talking to you I started thinking… there must be a way to run a fan with the stock 35a esc. So, I I tried it out.
I was able to run a 5v fan by splicing it to the servo harness. You want the black Fan wire to the brown servo wire and red fan wire to red servo wire. Then you can use 2 screws to mount the fan to the car’s center brace. So you can cool esc it if you really want!!
I also tried the easy first way by plugging the fan into the 5v light socket. Unfortunately this doesn’t work. It has 5 volts but the amps are off so the fan won’t run. That would have been nice if it worked

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BG428813438 irmão boa noite eu comprei o moto 3930kv para meu 1/16 q901 eu vou usar com meu ESC original mesmo será que vai esquentar.

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BG428813438 vou fazer um teste pra ver👍

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Marco320 Ya try it out and let me know how it works. I did not drive the car with a fan hooked up but on the bench it worked perfectly and it did not interfere with the functionality of the servo

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BG428813438 Irmão blz eu estou querendo trocar o pião do que vai no motor é as engrenagens vc me em diga oque meu rc é q901

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Marco320 I’m sorry bro, I don’t fully understand. are you talking about the motor pinion gear? The gear that is attached to the motor?

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BG428813438 sim é o pião que vai no motor queria um mais forte

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BG428813438 pôquer estou cansado de troca as engrenagens e o pião do motor quero saber se tem outras engrenagens mais forte

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BG428813438 muito obrigado irmão

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Marco320 I’m pretty sure you are talking about the motor pinion gear and the spur gear. Unfortunately you cannot change around gears on the Q.

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Marco320 I haven’t had any problems with the gears on mine. Are you greasing the gears? I use super lube synthetic grease.
Also are you using blue thread lock on the grub screw? (Grub screw is the little black screw the holds the gear to the motor) if you do not use thread lock the pinion gear will come loose.

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BG428813438 Irmão eu estou usando graxa de lítio e eu também estou usando trava de rosca azul também

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Marco320 Nice. Not sure why your gears keeping stripping out then. How many times have you replaced the motor gear and the spur gear?

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Marco320 Are you using the stock motor gear? Maybe the motor and spur gear dont mesh properly? to loose or to tight could wreck the gears. But the q motor mount is not adjustable so gear mesh should be good. Idk bro.
I wish BG let us post pics on these message boards so I could see what your dealing with

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BG428813438 Blz irmão vou colocar outra nova pra ver blz obrigado pela atenção👍👍👍

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Marco320 When you switch your gear again just double check everything. Make sure the bearings are good, make sure the spur gear is not worn out

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Marco320 Also I don’t know if you ever noticed this. when you take it apart again you check this. the center shaft with the spur gear on usually has a decent amount of movement front to back. so when you install the new pinion gear make sure you set it in far enough that when you move the spur gear back and forth it does not hit the grub screw

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Marco320 One more thing lol. I would clean out all the grease and any debris in there real good. I use q-tips lol. Maybe try a different grease. A lot of people use lithium but I’m personally not a big fan. I like to use super lube synthetic grease with ptfe. It really work great and it’s water proof. I have also used marine grease. That works good too. Sorry, I’m just running through anything I can think of that would cause you to keep stripping out gears.

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Marco320 Good luck brother

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BG428813438 Obrigado irmão pela dicas e por ser tão atencioso Boa sorte fique com DEUS

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Marco320 No problem bro. You as well

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BG428813438 🙌 obrigado

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BG428813438 irmão bom dia blz eu comprei esse motor mais foi 2845 5900kv meu ESC é esse original 35A ele aguentar esse motor ou não tenho que mudar de ESC.

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BG428813438 irmão boa tarde eu coloquei esse motor 2845 5900kv no meu rc q901 com ESC original dele com bateria 2s e o ESC funciona e para depois oque é será

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Marco320 What’s up brother. I’m sorry for the late reply.
I’m honestly surprised the original q901 esc can handle a 5900kv 2845!! Just keep tabs on the esc, battery and motor temps.

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Marco320 If the original esc fails and you plan on keeping the 5900kv in your Q You should get a 60a ESC. Max amps for a 5900kv 2845 is around 90a. The Surpass hobby 2845 5900kv max amps is 88A
The Racer Star 60a ESC is very powerful and its very small. it should fit in your q901.
I have my 60a esc in a px9300 1/18 scale lol.

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Marco320 Hey bro, I was just looking at my Q and my racer star 60a. This esc 60A will not fit in the original ESC location. Im sure it can be mounted to the center support but it will be tight. I forgot how little space this thing has. Sorry man

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Marco320 Oh by the way. I’m curious, did you find why you were stripping gears? Did you fix the problem?

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