MTT EP8 4 Cheap 3650 Motors Tested Surpass VS Gool RC 

thanks for the tip, i might try that next time.

Thanks 😀

Yes they are great value for money. 🙂

Yeah the load when the motors are running will be much much higher. It depends on the weight of the car, the weight of the drive line components and the gearing as well. Most of these motors are rated at 60-100A maximum, but on moderate gearing on 2s they'll be more like 30-60a.

a higher kv motor might suit some cars gearing options better than others, if you arE racing and limited to 1s for example, or you chassis can only fit a small battery.

Thanks 😀

Not neccisarily. Motor amp draw changes significantly under load. It just means the motor doesn't struggle to move it's own weight. I think higher KV motors use thinner motor windings which may make them lighter and easier to turn. Im not an electrician so I could be wrong.

The length. The numbers are the diameter 36mm and the length. 50mm, 60mm, 70mm.

Thanks. I only get motors I intend to use. I don't really need any 1/8th motors currently

No I haven't done that. I would have liked to do it though. It would be interesting to buy on per month for a whole year or something like that all the same to check for consistency.

Yes that is correct the maximum you can use is 2s with 6900kv motor otherwise the rotor will explode / come apart

@@LawrenceTimme Thank you very kind friend

Are u using the kk 6900kv?

@@joshuasalisbury789 7700kv

None at all. The motor tester is rated for 30A and none of these motors are anywhere near that.

So far the surpass platinum has been better than the hobbywing motor it replaced which was triple the price.

It really depends what it is going in and the gearing used.

They are all d wind.

@@LawrenceTimme Yes usually all the higher Kv motor are Delta winds with the Y pattern winds mostly being used to create low kv motors since less winds are required to achieve low KV value Also because it's hard to make a motor have an exact KV ie an extra or even half a wind may drop the KV below what they where trying to achieve so instead they may use Y windings because using a cirtian amount of Y windings on a particular motor may achieve a specific KV they where hoping to achieve. Also all these motors are closed can so they timing would probably be set to zero as to allow equal rotation speeds for each direction of rotation.

This A reading is the starting amp draw for the motor under no load as it says on the spec sheet.

Agreed, load test would be better

I would stick to 3s on the 3100 and 2s on the 4500. You really don't want to over rev them at all as the rotor will break.

@@LawrenceTimme thanks mate. The 3600kv is 13v. Maybe that is the max kv for 3s.

@@LawrenceTimme by the way I really like this video. The surpass hobby 5900kv is impressive, it is quiet and balance.

@@nomore25 yes for these motors 3600kv is the limit on 3s

@@LawrenceTimme i'll order the 3600kv motor now for my 12428. I have a surpass hobby 2845 3800kv motor on my XLH 9125. I put 4s, runs fine until i full throttled it. The esc fried and the servo affected too. But the motor is fine. Wow i'm amazed how the motor survived.

None of these motors would work well in a summit.

they are fine

Hello, I don't think these smaller motors will have kevlar wrapped rotors like bigger motors do. As long as you don't go over the manufacturers recommended rpm and the motor is together it should not come apart.

MPH?

Yes

I don't really do boating.

@@LawrenceTimme the 3660 is up to 4300kv and the small ones even more, which is definitely usable in the car territory. Also, im curious to know if the surpass platinum series (for cars, ribbed can and ?) actually perform better than the KK ones. But its fine when you dont want to. Cheers

@@jansvasta2146 I have a video comparing the 3660 platinum and kk series and an xteam motor on my channel :)

Yes that is correct if the gearing is the same.

@@LawrenceTimme not true if you under power an elecric motor it will run hotter from trying pull the current it needs to run correctly

@@jameshankssr466 that's why I said on the same gearing. It will run way less heat on 2s compared to 4s because the vehicle will go half the speed.

Thanks. Plenty more to come!

Wrong surpass is a separate motor company

Not sure. You probably need a program card and the instructions

@@LawrenceTimme dont have a programm card..

@@Thomas_Smaling you need to get one then to program it.

No I haven't. 14-15v would be a maximum of 3s which is reasonable for a 2300kv motor

@Lawrence Timme yeah took second look its 22v 2300kv 3650

Also there's a 3100kv 3650 thats rating 16v ?? Very tempted to buy just to see if it can take these claims but then need something to test on as i have only 1/8 scale trucks 🙁

@@4077661466jp 16v will still not allow you to run 4s as a full charged 4s is 16.8v so it's still only 3s rated. 22v is 5s capable, but they will not run a 1/8th car as it will be too heavy

@Lawrence Timme yes as everything you have is correct, but i had nor have any intentions on runing a 3650 can size motor on a 12+ pound monster truck, i was kinda of sharing a particular odd size/Voltage brushless motor as ive seen you have ability to test brushless motors without any need of installing into a vehicle, but also just realized you test kv output of a motor and that wont determine if a motor with gearing and moving the vehicle its installed in can take voltage its being rated at, any 3650 motor thats known of at max runs on 3s and thats probably everything under 3800kv, but First-time ive seen a 3650 size brushless motor with ability to handle anything more than 3s, which was my reasoning for commenting on your channel 😉 So yes im aware of weight and size limitations of a 3650kv and doesn't make any since to be wanting to install into a 1/8 size vehicle where i have currently 4268 2200kv motor on it .

No these are all 3650

I have some other videos of bigger motors too. Not sure which would be best for your car though.

@LawrenceTimme Ive found out my stock motor is fine and its the ESC that has failed me, causing stuttering and cut-off even at walking speed (car wouldnt go more than 4mph). But i have subbed and will watch more of your stuff, love info so brilliant channel 😉

I have a platinum series motor coming to test 👍 look out for it soon.

Yes :)

What kind of Esc could it use?

@@shepshepson I’ve got a racerstar 120amp esc, it’s £35 on banggood

Bought them from ebay, the prices change all the time, they are all under £20 though. You could also look on Ali express

It will use more power with the same gearing or prop in your case, but also it will run hotter because its drawing more power, so you might have to gear down or use a smaller prop.

yes need a smaller propeller

Run them both on 2s mostly but on 3s they fly! Just gets a bit hot after a few passes lol

Barely warm to touch. It's under no load and not at max rpm for long

eBay

Yes you are correct 👍

@@LawrenceTimme i wasn't trying to be one of those people who have to correct others mistakes. Just trying to avoid confusion.

@@RCAddictsGarage yes that's ok. I have corrected the title and description now. I didn't even realise until just now 😯

@@LawrenceTimme GCOOL did sound pretty good though.✊🏾

@@RCAddictsGarage I'll check out your videos.👍

Depends on what you are putting it in and what gearing/ speed you are running at.

@@LawrenceTimme I have a 1:12 scale vehicle. The gearing ratio could be anywhere from 3:1 or 2:1. Will be using on 2S Lipo. I already have a 30A HobbyWing ESC (16BL30). I'm just wondering if I upgrade to a 3650 3900kv motor... if the existing ESC can handle the load. Or if I need to buy a bigger amp ESC. Any info would be appreciated. Thanks in advance.

@@peterchung1934 I would recommend going to a 60A like the 10BL60

​@@LawrenceTimme Thanks Lawrence!

@Keaton Nova :'o

@Marcelo Westin :'-o

depends on the gearing

@@LawrenceTimme gearing and combo's are important for apply to the kind of rc alright?

I dont buy motors unless I plan to use them in one of my rc cars.

A 2S with very high c rating from a decent brand as it can pull a lot of current.

@@LawrenceTimme yeah I was thinking that. What not super expensive brand do you recommend?

@@misio6110 what car are you putting it in?

@@LawrenceTimme an old kyosho raider

@@misio6110 lol. I think this motor might be too much for it XD. I would go with a turnigy nano tech or something like that. I have used the 5.6AH 2s and it has been great.

I think , those are the peak currents , when you're driving the rc car.. accelerating full throttle , break etc that's when the current is the highest

@@FXV56 you mean under load

@@tstricklin4808 i guesss , the current is higher when you're full throttle-ing from a full stop , compared to when you're doing that but already at max speed , the motor doesn't need to work as hard.. in most cases

Skyrc motor analyser

I want to buy that 6900kv for my wltoys a979b and i need some 3s ESC under 30$, can you help me?

@@fran.6496 you can't run a 6900kv motor on 3s in this size because the rotor will just explode

Lawrence Timme is 2s ok?

Lawrence Timme also i asked What is better for speed, i would love to know Because im trying to make it 100kmh, i bought some Brushed motor and it runs 82km h but i want 100

@@fran.6496 yes 2s is OK.

They goolrc motors are very poor quality. Not out the same factory or same at all.

@@LawrenceTimme I’ve seen a few reviews of the goolrc that said it was decent, I suppose the quality control of these motors are a bit of a gamble. I’ll be receiving mine soon, I’ll report back if I get a different experience than you.

@@suubierex9396 OK I have seen a lot of people had issues on the MSUK forum with both gool rc motors and esc's. Hopefully yours will be ok

@@LawrenceTimme I believe it depends allot how people use these motors. I’ve heard people complaining their esc burnt out after using a high KV motor with a low amp esc on a 1/8 scale monster truck on snow..

@@suubierex9396 not they have used them correctly on the forum most people use them to replace a brushed motor. You can see video of it which they stutter and don't work well at all.

Lol

It need to be 3.175/3.2mm shaft pinion. The teeth and pitch depends on the spur gear in your rc car.

How do I find out the pitch on my spur gear

@@scottwilson9944 You might have to look in the manual.

@@scottwilson9944 so if u count the teeth and the diameter, with a ruler just make sure the rulers line goes through the centre of the spur gear and touches the furthest points of the teeth, and theres a calculator online if u put those two in, it will give you a number like 32.224342 just round it to 32pitch

Yes.

@@ericzajac5237 Answer is no. It is more complicated. But for example: if you have 3650 800W 3000kv and 3650 800W 6000kv, torque is almost the same.

@@harynian what??? In your example, torque should be halved, if you don't push current to the moon. And if you do, you'd get way more power and probably smoke the motor. Which is only logical, since the 6000kv has less turns to get that KV, but a coil with less turns at the same current generates less fieldstrength, which directly translates to less torque. I once threw a 3000kv motor in place of a 2000kv one without changing anything else. Drew A LOT of current and still performed worse in acceleration. Had to gear it down considerably, to make use of the increased rpm.

@@fabianrudzewski9027 Please, calm down. Question was simple: "Does lower kv make more torque", so answer is simple too: "no". Relating to my example: You have to know more about motor specification. 3650 800W 3000kv is rated for 16 V 50 A and 3650 800W 6000kv is rated for 8 V 100 A. Relating to the question: If you switch 6000 kv to the 3000 kv, with the same 8 V battery, you will get half of the torque. If you change motor to 3000 kv and battery to 16 V, you will get the same torque. You cant use 16 V for 6000 kv, because you will burn the motor. - a lot of people change motor to the higher kv to have more power and speed, because they use 2S battery and 2S is better for high kv motor - a lot of people have low kv motor and change 2S battery to 3-4S for more power and speed, because low kv motor needs more volts Brushless motor torque is calculated only from kv and current. Less kv = more torque, more current = more torque, but less kv = less current and you can check it in every motor specification. Summary: if you change motor 6000 kv 8 V 100 A to the 3000 kv 16 V 50 A, you will have half of the kv (more torque) and half of the current (less torque). Torque output remains the same in this situation. Relating to the coils: Yes, you are right. More coils = more torque, but only when current is unchanged. Unfortunately, more coils = coils are thinner = less current can flow. Tips: if you want to have more torque: - use as much volts as your motor can handle (look specification) - use motor with kv, which have max rated voltage as your battery - change motor to the bigger one Note: evey brushless motor is not empty inside, they are full of coils, no matter if they are thinn (many coils) or thick (few coils) and coils have their specified current resistance. You just cant build "much" stronger motor with the same size, you cant cheat the physics. The true way to have stronger motor is to buy bigger one. I hope it is clear enough now.

No they are both 4 poll motors. If it was a 6 pole they would read completely wrong kv on the motor analyser.

On almost every video 🤣🤣🤣

I was wondering why his voice sounded so familiar lol

It's funny

All these motors are sensorless.

What is mn?

china has a lot of factories

the motor isn't what the radio is supposed to hook up to bro

Which witch is which

?

@@LawrenceTimme what he is saying..u didnt recharge your battery to test each motor. Your battery became a little variable in this experiment being that it differed with each motor.

@@LawrenceTimme also all motors come different kv s than advertised. U can do that test with ten of the same brand and kv motors u will get different results on all. All motors with shafts amd bearings need breaking in. Afyer a few battery packs the kv will go up pretty close to what its supppse to be

@@josephfast5887 yes they come with different kvs from new, but no they don't get broken in. A brushless motor doesn't break in like a brushed motor.

@@josephfast5887 yes the battery is not charged between runs because the charger is not accurate enough. Also this is very low current and power so it doesn't really make a difference. The kV is the rpm divided by the voltage, so even if the voltage dropped a bit, the rpm will drop as well, so its not really effecting the result

Who's Gregg

5800, 43000

6000 50000

222, 333, 444..

This motor I got was terrible, they probably are very hit and miss due to bad quality control so I wouldn't recommend them.

Yes

G cool sounds cooler

This is sometimes the case, but there will also be multiple factories making the same thing. These are made in China so there will be many copies of the same thing made in different factories to the same design.