MIG 280 motor help

[CooLJoE]

Ok, I finally got my MIG 280 motor into my micro. Charged up my 5-cell AA nicad pack, put it in, and proceeded to test the new motor. Well, it seems about as fast as the stock motor. It had caps on the motor, so I took those off hoping for a difference, but it didn't change anything.

Anyone have any ideas as to why its like this?

I'm using a GM V3R ESC if that helps. And all settings for throttle on the controller are set to the max.

[Woody]

First thing, Capacitors do not affect a motors performance, so put them back on to avoid any glitching issues. Secondly, are you racing your micro on a track with other people? Or just playing araound with it? If you are on a track, I would put the smallest pinion on first. When you have a hot motor with a big pinion on it, the motor won't have enough torque to get itself into it's optimum power band. After the small pinion, you can gear it up until it doesn't accelerate hard anymore, and then go back 1 or 2 teeth. Good luck

[CooLJoE]

Well, the caps didn't cause any glitching so I'm leaving them off.

The pinions also cannot be changed due to the size of the motor. All the 300s and 280s have this problem. At most I can get the Kyosho metal pinions and gear even higher, but the 13T is the smallest that will fit.

[Woody]

Even if you do some grinding on the axle housing? My speed 300 will accomodate a 9 tooth pinion now. It's ballistic!

[CooLJoE]

Well, I don't really want to grind my axle housing away just to fit smaller gears.

The higher the toother the better top speed. Lower tooths get better acceleration. Over a long distance running the MIG 280 with 13T, it didnt get any faster than what it was at about 5ft of distance.

So I don't think 9T or 11T will help.

I'm thinking maybe this MIG 280 motor is just a pile of junk.

[other_cents]

With the faster motors adding torque usually helps. I increased my lap times from going from a 13T pinion down to a 10T pinion on a speed 300. The 10T allowed me to keep my speed up around the turns which became more important than getting the max speed on the straight away. Try each of them and see what works better for you, but I would not rule out a smaller pinion. You will need to grind down the rear axle to get it to fit.

[Woody]

You never answered if you are just playing around, or if you are racing competively. Like you said, the top speed is about the same. I'll bet if you went to a 10 tooth pinion, you'd see a difference. If you are just looking for top speed, I think they make up to a 14 tooth pinion. Just keep in mind that the higher the pinion, you will generate more heat in the motor, killing the commutator and the magnets. Good luck and let us know how it goes.

[Kingtooshy]

killing the magnets thats a new one

[gospeed.racer]

actually, Heat does kill magnets. The "Pro's" use Zappers to remagnetize the magnets.

[CooLJoE]

Well, its for racing. Sorry I didn't answer that.

Infact we have a race tomorrow.

But I'm still curious how it will make a difference. MIG 280 with 13T pinion is same speed as stock with 13T pinion.

I guess I'll try the 11T tomorrow, but I don't think its gonna make a bit of difference. I think its just a crap motor.

[Woody]

Nah, it's not a crap motor. Just make sure you don't heat the motor up to where it's too hot to touch. Like you said in the other thread, you can always buy a speed 300. always start with the lowest gear you can and Good luck

[CooLJoE]

Well, I tried the 280 with 11T. It seems a bit better, but not by much at all.

The motor never gets hot either.

Either way, I'm ordering a 300 motor so the 280 problems wont matter anymore.

[Woody]

Excellent choice

[DrFelix]

Is that the same motor as the 280BB (Simprop, Multiplex, Acro...)? I got one and it ROCKS! I´m running 6 cells right now, but also tried 5 before. It was a lot faster than the stock one. Maybe your gear mesh is too tight. My problem was the size of the motor (running 140mm). It bent the rear end of the chassis downward. As a result the belt was too tight. Will post the solution with pics as soon as it works perfectly (right now the belt runs clearly, but I don´t have any travel on rear-end suspension).

[Woody]

AAAhhh yes. Thanks Drfelix. We all have to remember that friction is a big speed killer too. Everything moving freely is a must!

[TGRupert]

hey, I'll buy your old motor. how many turns is it and how many amps does it pull?

[other_cents]

I believe the 280BB has lower RPMS than the Speed 300. The only thing is that the Speed 300 does not have replaceable brushes and you can not cut the comm. DrFelix, if that 280BB works great then I think I might try that since it has a better set of brushes and has much better contacts for the wiring.

[CooLJoE]

The MIG 280 I have is NOT a 280BB. Also, the gear mesh is not too tight or loose. I have made sure of that.

And I run 150mm since 140mm is basically impossible with the larger can size motors (300, 280, etc).

My personal feelings on this MIG 280 are that its just a crap motor. A dud if you will. Maybe some else out there has it and it works fine, but mine just does not perform well enough to be worth keeping. I consider it a replacement for the stock motor at most.

[Woody]

Anybody know where I can get one of these motors? Or a 280bb?

[CooLJoE]

http://www.hobby-lobby.com/speed280.htm

They sell the Speed300s and the Acro 280BB

[xxtcrgp]

im gonna give the 280bb a try, i like it cause u can cut the comm and replace brushes, does anyone know if they use normal bruhses?

[CooLJoE]

I doubt they do.

[TGRupert]

has anyone tried evey motor? It seems like a few of you buy one of every part that comes out.

[xxtcrgp]

what do you mean by every motor, theres a ton of motors, theres slot car motors, all kinds of different ones, im sure some has not tried everyone because think theres all the brushless motors, all of the airplane motors and such

[Trikster]

The RPM difference between the 300 and the 280BB is in the hundreds...the 280BB motor looks just like a 1/10 scale motor, just smaller. Even the brushes are the same, only smaller.

The HPI mod on the other hand uses a different brush setup. Kind of a big metal thing with a brush on it... kind of hard to describe....

[CooLJoE]

Actually its more of a thousands difference.

This is taken directly from www.hobby-lobby.com as they list for their Simprop Electronic Speed 300 and their Simprop Electronic Acro 280BB:

Speed 300 - Rpm/v: 5554
Acro 280BB - rpm/v: 4000

Both list as 6V motors, so that would equal the following RPMs:

Speed 300 - 33324 RPMs
Acro 280BB - 24000 RPMs

9324 RPM difference. Of course the motors aren't exactly those specs, but they are close.

[CooLJoE]

Ok, to put a final ending on this thread about my MIG 280 being crap, I finally got my graupner 300 (an actual graupner 300).

Installed it today with the ARM 300 motor plate. Replaced the larger wires to a somewhat smaller size (I think they were 16awg, now they are like 18 or 20). Put the 13T pinion on it. And plugged all the stuff in and turned it on.

I held the thing in the air and blipped the throttle. DAMN its fast!

Just blipping the throttle with it held in the air I was afraid the plastic univs would shatter right there.

Put it on the tile floor but couldnt get ANY traction at all. So tomorrow I will test it outside. But needless to say its WAY faster than the MIG 280. Which means I wasn't doing anything wrong, just the MIG 280 is total crap.

[TGRupert]

how much does a graupner 300 cost?

[CooLJoE]

$15 at Hobby-Lobby.

I just took my micro outside for its first street test. It broke traction all the time and was REALLY fast. 300 is definetely worth it.

[TGRupert]

how did you mount it? did you get that plate from ARM?

[CooLJoE]

Yeah, the 300 motors have standard screw mounts. The ARM 300 motor plate works with all of them. 280s will not work with this motor plate though. You would have to custom cut one.

[xxtcrgp]

do you think it works with speed 380? i have a plate already but it i wanna try the arm

[Trikster]

I kinda doubt it, the 380 is a slightly larger can. I want to go brushless myself, but that is a long way off. I did just get a LRP Quantum Reverse... It actually rates better for continuous amperage than the Sport. The brakes seem to be stronger with reverse locked out than the sport as well. (was able to try them both out on identical cars) I am talking the Max Current...45A. I think I am going to run the Big Block with a 10 or 11 tooth pinion on our track. I think this will be almost too fast for the track that I race at. It will rock for the 1/10 scale track...maybe get wild and throw a 12-13 tooth on there. :D

I have a buddy that is building a chassis that looks like a cross of the ARM and the Ratzas GTP chassis that has cut-outs for 10 2/3 sub c cells. His prototype with a 14 tooth pinion was in the mid 30 mph range. (granted that was a stopwatch over a specified distance) I think his goal is to use 14 cells with one of the ducted fan brushless systems with the 14 cell ESC. Heck, if he goes any faster, he should just throw a C-sized rocket motor on it. :cool:

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