Anybody experiment with motors?

[JThiessen]

Has anyone, prior to going brushless, experimented with alternative motors in their emaxx? I'm looking for solid testimoney on motors like the Graupner 700's, Dewalt 820's, Johnson 770's, even some of the airplane motors like the Astroflight Cobalts...
There are TONS of electric motors (brushed) out there, but there doesnt seem to be too many who have tried them out. I just picked up a Super Duty ESC, and am chomping at the bit to get something new under the hood (NOT brushless!!!!).

[captain harlock]

The dewalt 820 and Johnson770 are said to push a stock E-Maxx to the 50s. That's what I've heared.

[squeeforever]

im pretty sure it will at least get it in the 40s but i would assume it wouldnt be to fast getting there. the monstermaxx 550 motors by trinity or even some 13 turn mod motors would be nice.

[maxxdude1234]

I've run a single dewalt 820 in my truck. On 14cells its a touch quicker than dual titans and a lot more torquey. Have a look at www.kershawdesigns.com , the guy that runs it (Dan) has lots of big brushed motor conversion for the maxx/savage.

But I speak from experience when I say there is NO comparing brushed to brushless. Once you go brushless, you will NEVER go back - it really is worth the extra money.

[Sneeck]

And even if you can find a brushed motor as fast as a brushless one, it will wear out in a few run's. Meaning allot of maintanance which cost's big $$.

Don't waste your time and money and do it right the first time.

[JThiessen]

Well, I need to reiterate - I am NOT trying to as fast as brushless. I am NOT looking for the fastest thing on electrons.

I bash with my B'law and nephew, I dont race. 40MPH is plenty fast for me.

I've been looking at the Kershaw site for a while. But almost every opinion on them is "I've heard....."

Maxdude is the first actual user I've run across....

[coolhandcountry]

I can see where you coming from. I don't race either. I have not ran the big brushed setups either. I have ran brushless. I love it. You don't have to go fast to have a brushless. Just have to build accordingly. If you go with the big brushed let us know. I started to run this my self at one time.

Do not go with the trinity 550 motors
i spent over to $300 in those motors
they kept burning up even when i rebuilt them every 10 runs nobody could figure out what was wrong with them.
go brushless

[lydiasdad]

I run a victor speed control with a dewalt 820 motor geared 21/72 with 18 cells. I am very happy with it. I may run 20 cells soon. My 820 motors nominal voltage is 24 volts and the victor can handle 30 volts. I showed it to a friend of mine who runs an 8xl with 18 cells and he was very impressed. As far as durability goes, They have hard brushes that take the voltage easily. I also run an 820 motor on my jugg2. I use the super duty with 14 cells on that and it works great. I will post pics tonight.

[JThiessen]

I agree on the Trinity's. Very high maintenance.

I've never heard of a Victor ESC - I'd have to take a look at those, but I just got my superduty, so I'm kinda set for speed control.

With this large of a motor, would a seperate current flow control be advisable? I can picture one these motors sucking a lot of amps....

Is that Dewalt motor the 24V hammer drill motor? I found those here Robotics Store . It sounds like I'm looking at the same setup as you have on your Jugg. How did you do the 18 cells - 2 9 packs, or 3 six's? I'm under the impression that I have to up my cell count if I'm going to have decent run times.

[lydiasdad]

I have the 18 volt 820's but their nominal voltage is 24. The victor is a robot speed control. It is actually the victor 883sc. They are available at robot marketplace. Run time is pretty good. My jugg uses cheap 3000's and it's run time is about 10-15 min. It is very fast on 14 cells. I have it geared 20/76(it has an e-maxx tranny). My maxx has gp 3300's and its run time is about 7-10 mins. It hits 40mph easy. If you want more runtime get the 18v 820, if you want more speed get the 12v 820. PM me if you need any help. I have tried everything, 775's, 820's and 970's. The dewalt 820 is the best brushed setup I have tried.

[lydiasdad]

Here it is: I have more pics in the user gallery.

I tried to run a 820 in my Twin Force, but my EVX hated it and I couldn't get it to run right. I also ran a HTI 700 size motor in it with the EVX, but it sucked on only 14 cells, it would have needed at least 18 or so but I couldn't run that many with the EVX.

[lydiasdad]

Originally posted by dabid
I tried to run a 820 in my Twin Force, but my EVX hated it and I couldn't get it to run right. I also ran a HTI 700 size motor in it with the EVX, but it sucked on only 14 cells, it would have needed at least 18 or so but I couldn't run that many with the EVX.

Those hti motors need a high cell count indeed. A better 775 for lower voltage is the 9.6 volt dewalt. My super duty runs the 820 with no problems at all. Temps cool on everything. It is very smooth also. When you say "I couldn't get it to run right" what do you mean?

[maxxdude1234]

My 820 used to run fine on my EVX. 14 cells, no probs at all. Very nice motor for the price.