Is this a crawler motor for the C.C. ?

[STANG KILLA SS]

GREAT test robb! i take it you liked my digi scale idea ;)
now THATS data!
i assume you zeroed the scale with the arm resting on it already?
it seams safe to say those motors are 4 times as powerful as stock.

now we just have to find out how the start up is on a 6 cell stick pack.

why not just lathe down the cobalt shafts so you can use stock pinions?

[spartacus_nuc]

Originally Posted by Robb

Think you can't get any power out of a little 3/4XX motor at 7.2V?

I never said you couldn't get any power out of a 400 size motor, I said it was difficult to get "satisfactory performance", meaning a high stall, low speed, and gobs of torque. Those torque numbers on the cobalts are impressive, but how smooth are they? How fast are they in the CC? I have seen others say the startup on those is pretty harsh. If you can get those cobalts calmed down, you may have the 7.2V answer.

[STANG KILLA SS]

can the timing be changed on the cobalts? could that help with the startup?

[Robb]

Originally Posted by spartacus_nuc

I never said you couldn't get any power out of a 400 size motor

I meant no offense, please don't think I did.

I'll see what I can do about getting some temporary testing done here soon. I haven't placed my order with Tower yet, so most of the upgrades won't be here by the weekend, but I am sure I can get some sort of rig moving. Only problem I really see is getting my hands on some pinions, unless I mill down the motor shafts as mentioned.

And Killa, yes the timing is adjustable.

[spartacus_nuc]

Originally Posted by Robb

I meant no offense, please don't think I did.

And Killa, yes the timing is adjustable.

None taken. I think testing and trying out motors will solve the achilles heel of what is otherwise an awesome crawler. How many poles are the cobalts? Can they be rewound to the point that they are tame? I have to say that the long can 400's are pretty definitively the answer for 14.4V, and that will solve all the motor problems for people who just want to do some simple mods and improve the performance. For the hardcore crawlers, finding a motor that will yield good performance on 7.2V or 3s lipo will be the answer. I can certainly see why you are trying the cobalt route, and good luck!

[braxx]

Do you think the long can 400's can be used with a stock speed control?

[sweli]

Wow ROBB, making Macgyver proud LOL

Where is your leather bomber jacket and bad guys chasing you with AK47's?


Kids and wife were on spring break, so we are down in Arkansas with the grandparents. Brought my 2.2 BMV and 1.9 Mog scaler along. LOTS of rocks in these hills, right out their back door!! Just watching for Ticks, spiders and snakes waking up in the spring. Even got out the gates and kept some scores with my 5 and 7 yr olds. They loved the 165ft deep Cavern tour sidetrip today!

[spartacus_nuc]

Originally Posted by braxx

Do you think the long can 400's can be used with a stock speed control?

Yes, they don't draw a lot of current so I see no reason why they wouldn't work with the stock speed control. That's just my opinion, and I'm not using a stock speed control anymore, so try it at your own risk. I don't think there will be a problem, but I don't want someone to blame me for blowing their speed control. My stock speed control took a lot of abuse testing different motors before I got the traxxas EVX, and my original speedo is still working great in my daughter's CC, I just wanted a more powerful ESC with a manly BEC for my high torque servos.

[braxx]

Cool, I think I'll try it on a stock ESC. If it blows up I'll get a better one.
Do you guys know if there is any timing buildt into these motors?
Do you think thses motors will tear up stock gears?

Thanks!

[spartacus_nuc]

Originally Posted by braxx

Cool, I think I'll try it on a stock ESC. If it blows up I'll get a better one.
Do you guys know if there is any timing buildt into these motors?
Do you think thses motors will tear up stock gears?

Thanks!

Very little, if any timing. YES! The 400 long cans will eat stock gears. Just turn down your EPA a bit to prolong the life of the gears.

[spartacus_nuc]

Instead of trying different motors, I am going to try the 400 long cans with different voltages, and start using my kids' CC's as test rigs as well. On 6 cells, those motors are much better than stock, but still have some stall. On 12 cells, there is no hint of stall, PERIOD. No hint of teeth on my counter gear, either. Somewhere there is a happy medium of stump pulling torque and gear life. That happy medium may fall into the range of what can be used on a good crawler ESC with drag brakes.

[SDheavymetal]

Originally Posted by spartacus_nuc

The 400 long can motors from banebots are the 14.4V answer. You only need to mount the upper links on the outside of the axle bracket, and they fit perfectly. Testing was done with 2.2" M3 compound Flat Irons, 11T vendetta (machined vs crap metal) pinions, and a traxxas EVX-2, no drag brake, but with a 2.5 amp, 6.0V BEC, it makes my servos happy. I could not make them stall in any situation. The gears started stripping long before I gave it full throttle while holding the truck still. Even using a radio without throttle expo, power was smooth, linear, and easy to control. Dial down your endpionts a bit, and you're set. This concludes my 14.4V testing, and I am VERY satisfied with the performance on the rocks. On 7.2V, the same setup was pretty darn good, speed is perfect, motors stall if you get a tire wedged, but still more than enough torque to push the back end over obstacles. Performance seems really close to my 110 turn handwound motors in my daughter's CC, but without the rewinding. I am not sure it is possible to get satisfactory performance from 7.2V with such small motors, but I am going to try that next. Maybe rewinding the long cans.........

Is this the motor you guys are talking about?
http://banebots.com/pc/MOTOR-BRUSH/M5-RS390-12
Thanks Matt

[sweli]

Hey ROBB, Spart....,

What about these Johnsons from EGoldmine.
https://www.goldmine-elec-products.c...?number=G13775

I cannot locate stall torque on them.
3-12vDC.
At 6v, they spin 1700 RPM. That would put them at 283KV. Wonder if that is a typo on their part. Might have decent torque.

Thoughts?

[spartacus_nuc]

Originally Posted by SDheavymetal

Is this the motor you guys are talking about?
http://banebots.com/pc/MOTOR-BRUSH/M5-RS390-12
Thanks Matt

Yes, and I just ordered 4 more of them for my kids CC's.

[brokenb4]

I've got a few of those on the way.

Are the pinions you used(11t vend.) necessary?
Would the stock ones work fine?

[spartacus_nuc]

Originally Posted by brokenb4

I've got a few of those on the way.

Are the pinions you used(11t vend.) necessary?
Would the stock ones work fine?

The stock pinions will work fine, my stock pinions just broke from being installed on many different motors during testing, and I wanted something stronger. I have a Vendetta ST, and the pinions seemed to be much better quality and much stronger. One thing that helps the stock pinions out a lot is grinding a flat on the motor shaft for the setscrew to engage. It would also allow more thread engagement in the pinion, and the setscrew shouldn't have to be as tight to prevent slipping on the shaft.

[brokenb4]

Thanks for the info. I can't wait to test them out.

[brokenb4]

Originally Posted by SDheavymetal

Is this the motor you guys are talking about?
http://banebots.com/pc/MOTOR-BRUSH/M5-RS390-12

They showed up today, I got them installed and...





Oh my, it's like a different truck. I have all metal gears in the front but the rear was stock. The rear lasted about 10 minutes before something let go. I was being very abusive, like all 4 tires bouncing on ledges at full throttle.

I'm very pleased with these, I could never get them to stall completely like the stockers would do if put in a little bind. Good low power control and way more wheel speed than stock. Metal gears I would say are definately a must with 14.4 volts but sooo much fun.


spartacus you da man

[braxx]

Thank you spartacus for all of your work on finding this motor solution.
I just ordered some of them.

Now I just need to find the metal gear sets for the front and rear without paying $50 plus shipping :-(

[brokenb4]

Originally Posted by braxx

Thank you spartacus for all of your work on finding this motor solution.
I just ordered some of them.

Now I just need to find the metal gear sets for the front and rear without paying $50 plus shipping :-(

You could probably get by with plastic gears for a while if you ran I'd say... 10 cells instead of 12 for a battery, maybe even less. You could also turn the throttle end point down.

I broke mine while at full throttle hopping on carpet while climbing, I'd call it abuse. But I couldn't help myself. I never thought this thing would have the power to jump up things.