motor kv please?

[crusey]

my point from the beginning is this is not a high price castle system or bb setup and when you say you can assemble the same combo for 60.00 i would like to see it. i never meant to pick a fight .this combo runs good on a 2 cell in the dirt and flys on a 3 cell on the street .i am not into speed runs either anymore

You are running the Got2GoRC combo ?

Its just a rebadged Ezrun 35A ESC (with ext bec) and tweaked pulso motor unless it has changed recently

They retail for $122 dont they ? Hardly a bargain

Who told you it had better FETS that were made in the USA ?

Adding those FETS make the ESC capable of running a 6000kv motor on 3s ?

Cheers

[50togo]

probably a killer esc on a stock motor running 4 cell

[50togo]

this is pretty much dead why you starting it back up. i am home with a spine injury feeling like crap all day don't need this! he emailed me yesterday told me he has them custom made with usa made fetts to better handle heat of running 3 cells on a 6000kv motor and that the motor is not an off the shelf chinese made either .CAN WE DROP IT

[crusey]

Dont need what ?

Healthy discussion is what forums are about

You made a statement that the design of your ESC is the reason why your car went 50 mph on 2s, which is not correct

The combination of your motor, ESC and batteries determined your speed

Throw that same motor in with any decent 1/10 scale ESC and you will get the same results

Run it on 3s geared for 75 mph and see how long it lasts before it melts

He may well have custom FET's added to his ESC but the base Hardware comes from China

Think you will find the FET's are added at the factory

Cheers

[jhsmith87]

no need to argue over this guys.. 50 got his set up and is happy with it thats all that matters right??? lets just leave it at that...
but cursey i think $122 is a bargin, considering castle gives almost same results for more than double that.. but its not that big of a deal guys. evey one has an opinion.. as long as your happy with yours what else could you ask for not every one will feel the same about your choice in electronics..

Cursey: please tell me what esc i could get to make my car with stock motor do 80mph i think you said 80 or whatever speed it was..

[50togo]

read it over again-peter said this- Higher Kv motors go fast with lower voltage. As far as I can tell, that is the only advantage.
So if you only want to use 2S, you want higher Kv for more speed.
Higher Kv motors are more sensitive for gearing and will heat up faster when you overgear them.
and i wrote-And mine rips on 3 cell not limited to 2 cell at all. My Esc has USA made fetts, Chinese esc's with Chinese fetts wouldn't be able to handle it. meaning it can handle 3 cell heat better didn't mean the only reason it ran 50 was because of the esc.but i think you know that by now .and i have done multiple speed runs on a 3 cell with no problems not full throttle because it will wheelie at 60 if i nail it

[Petertje60]

You can get a Castle combo for around $140 with a 6900 motor. That will certainly heat up quick when you gear it too heavy, but might be insane fast.
Running a 6000Kv motor on 3S would push it to 66600 RPM. Most brushless motors dont like that amount of RPM.

Being happy with what you are using is most important indeed. Just bear in mind that if you write statements on this place, you can get replies.
I wish you the best with your spine injury, 50.

Since the weather is awesome here, I will throw my 4S brick in my Stampede right now and see if I can poke some chinese FETs to a nice temperature

Sent from my Transformer TF101 using Tapatalk

[jhsmith87]

hey peter... what esc is need to go with the stock motor to make it alot faster? i think your the one who said you could just get a better esc... is it the amps? just get an esc with more amps than stock? or what? could i get one from hk that would go good with stock, untill i can get the system i am wanting?

[Petertje60]

hey peter... what esc is need to go with the stock motor to make it alot faster? i think your the one who said you could just get a better esc... is it the amps? just get an esc with more amps than stock? or what? could i get one from hk that would go good with stock, untill i can get the system i am wanting?

That wasnt me, but crusey. I think you could put a Mamba Max Pro in it. I never ran that with the stock 380 VXL.
I know the motor is the strongest part of the VXL combo. Not that I recommend it, but I know there are quite some people that run the VXL motor on 4S. At that voltage, you need less amps to produce the same or more power. 50A on 4S is already 740W, which is a crazy amount of power for a small car like the Merv.

[jhsmith87]

So please correct me if I am wrong... But my motor will handle 4s but not stock Esc? Because its only rated 52a? So if I get an Esc that is rated for say 100a and/or says 4s I cou run 4s and get lots more power with stock motor? And run 2s with cooler temps? So I could get more speed because I could put more power to it? Is it all because the amp the Esc is rated for?

[50togo]

Peter thanks.where can you get that 6900 combo for 140? At tower motor alone is 128.00 thanks

[crusey]

Stock motor has a 3s rating from the manufacturer

Nothing stopping you running it on 4s but it will melt if used for anything more than a couple of speed runs

To run 4s you need a 4s capable ESC, something like a Castle Mamba Max Pro

Not recommending running the stock motor on 4s at all, simply stating that it can be done

If you want to run those sort of speeds without heat you need to use upgraded components

Not really that hard to understand the concept

Decide what voltage you plan to run (number of cells)
Decide what speed you want

Select a motor / esc combo that is capable without getting hot

Selecting a motor for a couple of speed runs is a waste of time

Cheers

[jhsmith87]

Got ya.. I seen on eBay a castle creations system with a 7700kv motor.. I bet that thing will FLY!!

[humayrayakongkinaon]

Hobby people sell them for $149 mamba ESC sv2/6900kv.
http://www.hobbypeople.net/index.php...tor-combo.html

[50togo]

that's right it's a big block i was talking small block!

[jhsmith87]

Yea bb.. I'm really wantin to stay sb but after talkin to tech support at castle and hearin about a 7700kv motor I'm starting to rethink.. He said he had the mmp on a merv, and it ran 4s super fast didn't know exact speed, but said when he put the sidewinder sv2 7700kv it'll only handle 2s and really low gears like 15/50 but he said it was so fast it was almost undriveable... Said twice as fast as mmp... eBay has it brand new $125 shipped.. I'm starting to think bb might be the way I go.. Considering all I do is run it up and down the street in front of my house downtown..

[50togo]

With mainly on road I would say go for it!

[crusey]

The smaller 26mm Castle motors dont make enough power for these cars

If you dont mind spending a few bucks the Neu 1100 series motors are the best 380 size you will find

They can be ordered in various KV ratings for any voltage you need

Cheers

[jhsmith87]

I looked at the neurotrophic, but they r a little bit more money than a whole castle system, that has a 7700kv motor.. I just figured that 7700kv would be insane

[50togo]

You would be limited to two cell.batteries with that motor

[50togo]

hey jh check this out! In internal and beta testing, we were unable to find gearing options that would actually thermal the controller when used within spec:
Max input voltage for ESC: 3s lipo or 12 cell NiMH/NiCah
5700Kv motor max voltage: 3s
7700Kv motor max voltage: 2s

The Kv of a motor is the number of rpm’s it will turn per volt of input. So the 4600Kv motor will turn 4,600 rpm per volt of battery. On a 6 cell pack we can presume good cells are holding around 1v per cell, so 6v x 4600Kv = 27,600 motor rpm.

On the other hand, if we take a 3 cell lipo pack with the 7700Kv motor, that gives us 10.5v x 7700Kv = 80,850 motor rpm which is safe for the ESC, but well over the safe motor rpm limit so it cannot be used either.

So how can you get the most speed? You might think the 7700Kv motor having the highest Kv would automatically allow you to have the fastest setup right? Let’s find out:

7700Kv x 2 cell lipo voltage (max with this motor) = 53,900 motor rpm.
5700Kv x 3 cell lipo voltage (max for the motor and ESC) = 59,800 motor rpm

So the fastest 5700Kv motor setup is actually 6,000 motor rpm faster than the fastest allowable 7700Kv motor setup!

Now if you are racing with 6 cell packs only, then obviously the 7700Kv motor will be the fastest option for you, but we are routinely asked “what is the absolute fastest setup for my car/truck?” The answer in this case, is the 5700Kv motor with a high quality and high output 3 cell lipo pack made for 10th scale cars.

[crusey]

KV rating alone does not tell you how fast the motor is capable of pushing the car along

The motors ability to make power under a certain load while staying at a decent temp will determine the speed it is capable of

2s lipo with stock sized tires .......

Stock motor with stock gearing (4000kv 28/50) - 31 mph
4600kv with 24/50 gearing - 31 mph
5700kv with 20/50 gearing - 31 mph
6000kv with 19/50 gearing - 31 mph


Cheers

[50togo]

Just an article I got straight from castle!

[jhsmith87]

Great article 50 thanks a lot...