Size motors to use with MMP
 

I have been reading around and noticed that it was mentioned that the MMM’s warranty would be void if the motor used was less that 70mm in length for a 36mm diameter motor. I guess the same would be true if a 2200 or the 2650 was used with the MMP? What are the recommended motors for use with the MMP and 6S? I don’t think any of the current available CM-36 motors (4600Kv-9000Kv) would be a good choice to use with 6S.

Jeff

wat are u running it in?.. some of the CC motors will not even let u run 6s.. my 7700 sure dont.. its 2s maxx!..

i think your looking for around 1600-1800kv motors for 6s

I am really looking for what is the largest (physical size) that should be used with the MMP in any application that it is designed for. It seems that most 540 sized motors are good for about 500-600W and the MMP is capable of about 1700W. I know that a motor the size of the ones used for the MMM are too large and would draw too much current for the MMP, so what are the appropriate sized motors to use?

Jeff

Anybody have an answer for this?

Jeff

I could be wrong here, but I believe CC's recommendation for X size motor is basically just to provide a basic guideline for noobs. Of course, any motor can be the wrong size depending on how it is used, gearing, etc. It basically prevents people running the CC5700 motor in a heavy MT.

As long as the current and voltage are at or under the ESC's capability (6s and ~80A), there really is no limit. Choose a proper size motor for the job with the right kv for the voltage used, gear appropriately, and there won't be any problems.

+1, I could run my MMM in my Mini E-Revo and there's no chance in hell they could deny a warranty claim :lol:

There was somebody in one of the MMP threads that posted about running a race with the 2200 and a MMP and Patrick congratulated him (I think he did well in a race). Keep the amp draw down and you have nothing to worry about.

What are you planning to put this in and how fast do you want it to go?

I have wanted to build a high speed car for a while now and am debating if I should get the MMP or MMM. I have a Lightning 10 buggy, that I think would do a pretty good job, but I don't think I can get the MMM under the body but the MMP seems to be a good fit, I think the current is a little on the low side, but the 6S capability would make up for it.

I have run as high as 4S A123 on the MM and it does pretty well, but I have to use a UBEC since it seems to shut off for a few seconds (does the same on 12S Nimh also) so I think the BEC is shutting off. On 4S it really screams but I saw a few peaks of 178 amps (kinda high), but it keeps rocking and rolling.

It would seem to me if you used a 2200 on 6S or a mini erevo motor on 6S it would kill the MMP for sure. Patrick mentioned in one thread that the 2200 could draw in excess of 2K amps and in another thread that they would not warranty a MMM used on a motor less than 70mm long. I cant find the thread for the 70mm statment, but it made since to me at the time. I looked most of the evening yesterday but Patrick posts a lot and I get side tracked easily.:smile:

Jeff

yea i run my castle 2200kv on my mmp in my d8e runs great !

on 6S?

no on 4s

About the MMM and the MMP I also was wondering if it is possible to swap the motors used for 1 ESC to use it on the other ESC?

for instance the 2200KV motor used in the MMM, can easily be used with the MMP ESC with 5s?

if that is all easy to swap, why would Castle than market it in such a way that MMM can only be used with 1/8 and MMP only with 1/10? :)

hm,

I see that the MMP uses 4mm bullet connectors wich goes up to 75A
and the MMM uses 6mm bullet connectors wich goes up to 200A

so I guess that has somewhat a influence on the relation ESC - motor?

Connectors can be changed. All you need is a soldering iron. Heck... You don't even need to use connectors if you direct solder. Not sure what your question is?

All CC is trying to say is don't overload the esc. They can both run a 1/8 buggy or as large of a motor as you want. It's just the amount of load you are putting on it. Lots of factors go into figuring out what the load is/will be. If you don't understand I would reccomend just getting the MMM if your car is a 1/8 and getting the MMP if it's 1/10. That's why castle speced them that way.

okay thx

I don't recall ever making that statement. You can always run a smaller motor on a big controller. The MMM can commutate a motor just as fast as our smaller controllers, so there is no real limit on RPM on the MMM.

I have a mini-revo running 6s on my MMP with a Neu 1115. I think the MMP is more than capable. So far I havent seen temps over 140. I get my Eagletree this weekend so I can see what kind of amps I'm actually pulling.

I don't know why you would say that. Motor current is a function of load (gearing, weight, etc) for the most part. In something as small as the mini ERevo, there is practically no load, so you'd be lucky to draw 10A max, and most of that would be the power required just to accelerate the rotor by itself. Frankly, I'd be more worried about the drivetrain.

. I actually think Joe might have said something about this . IIRC it was pertaining to a smaller motor, in a bigger vehicle, and that once a small motor starts to go, it can fry the esc due to over amp draw. The smaller motor being more likely to have a problem with a heavy vehicle.

Thats what I seem to recall too- was quite a while ago for sure. Using an undersized motor and trying to gear it like you would a larger motor will cause issues with any esc- once the motor starts to demag its sucks current like crazy- esc and wires then start to heat up alot; take my word on that one... :whistle:

lol so, can somebody sum up for noobs? :D

MMP (1/10 esc) + small motor (for 1/10) = good combo
MMp esc + larger motor (2200kv) = bad...because

MMM (1/8 esc) + small motor (for 1/10) = bad...cause
MMM + larger motor (2200kv) = good combo

MMP + Larger motor = Bad when used in the wrong setup, in 1/8th setups I'd use it only on 6s with lower KV motors when your peak power output is less than 2,000 watts (keep the amps down).

MMM + Small motor = OK. Small motor + big truck = bad. You won't hurt a motor or ESC by using an overkill ESC.

Ok it wasn't you it was Joe and it was 68mm not 70. I guess I remember seeing the Castle logo and since you were the last one to post I thought it was you.

http://www.rc-monster.com/forum/show...ght=warrantied

I would like to use the MMP unless you recommend against it. I would also like to keep in warranty at least until it is up. I need something smaller than the MMM combo to keep it under the buggy body, there isn't a lot of room under there. Since I don't plan on bashing around with this car (at least with the same setup) so would be recommended for this application?

Jeff

Dunno I guess I was tired.

I'm probably gonna get booed off stage for this statement. But it seems to me like Novak has the best mid-size motor right now, the HV. Why not take advantage of all that sensor work they put into it. :D If you used the 7.5 (3000kv) then the bigger rotor, which is supposed to drop the kv, and figure that it is an unloaded rating, it should be fine on 6s.
I'm thinking of running this combo, in 4.5 flavor, on 4s, in the new Slash 4x4 .

I agree asheck. With the demise of Medusa, the Novak HV series is about the best mid-size motor out that I can think of.

*cough* neu 1509 and 1512 series *cough*

:lol:

OK, I guess price should have been mentioned too.

What does an HV motor with the new rotor cost?

Especially when you can get a reman Novak for 70 bucks. Rotor is an extra 37. But imo it is not an absolute have to have.

$107 for a motor that can push a 1/8th buggy or MT around with good power is pretty good. I doubt the Novak motor will be good for much speed, but it should do 35-45 depending on the weight of what it's being used in.

You are not talking about speed runs then right? I run faster than that with a $25 motor.

Jeff

My 4.5 with an 1/8th in shaft did 47 in my E-revo http://www.youtube.com/watch?v=nLY9EGOfwOc This was on SPC 8000's 10c 4s. That was on my bashing gears of 14/68, with the low power Novak ESC. With high power lipos, and the MMP I'll bet low 50's could have been possible. BTW I never had this setup have the motor go above 145.
In a mid-sized vehicle, with a big rotor, I think it would be good for any kind of reasonable speeds you want. I'm planning on gearing for around 55 with the Slash.

I have just upgraded an old HV4400 motor that was laying around, with the 5mm sintered rotor and matching endbell.

I put this in my E maxx with a MM Pro geared 14/52 using Mod 1 gears. Only being ran in the house so far, it's not completely clear just how well it's gonna do. Low speed driveability is smoother than re-churned butter.

Right now, it's being powered by 4S 4500mah Lifepo4.

The Magnetism of the new rotor is MUCH stronger than the old 1/8" shaft rotor.

I wonder what the new kv is and just how high can I go with the voltage?

Can it handle 5S or 6S if geared properly?

AH! Joe was basically saying "Don't use a motor that is too small for the application!" cause it will fail, and take the ESC with it...

It's fine to use the MMM in a smaller application -- as long as the motor is sized appropriately.

If it is the standard size rotor, it is actually supposed to raise the kv slightly, if it is the 14mm rotor it is supposed to drop the kv substantially . This is assuming that the 4400 is going to respond the same as a 4.5. Which with 1/8 shaft was listed as 4800 kv. Then with the 5mm upgrade they changed it to 5000kv. Now they say with the 14mm rotor you can gear it up because of the lower kv and added torque.

That 4400 rotor was supposed to be horrible, your lucky it didn't blow. Mine was atleast the sintered 1/8th shaft.

If it was the 14mm rotor I wouldn't be scared to throw 5s at it. Novak did this to a stock 4.5 and broke 100mph in a street car, with their esc.

*cough cough*

Yeah, some CC/Neu 1509's in kv flavors of 1800, 2200, 2700, and 3500 would be nice! You'd better get on it before we all spend out cash on other motors. :wink:

+1, would be a welcome addition to the line of CC Neu motors (which is too small *cough* *cough*)

How about 3500, 2350, and 1750 (1Y, 1.5Y, 2Y)??

The CC/Neu rotors don't do D winds.