New 3905 E maxx AXI Outrunner setup

[sikeston34m]

Just call me the outrunner motor man. LOL I guess I'm a little obsessed with them. They are very powerful, very efficient, and present a new challenge in gearing and configuration. I like it.

With this setup, we're using the factory Revo style slipper and mod 1 gears.

Motor choice is an AXI 2826/10 with the fan added. The AXI is spinning one of Mike's 22 tooth Mod 1 Pinions. The 5mm Motor shaft length is 20mm so it goes all the way to the end of the pinion. Perfect and tough!

Spur choice is a Nitro Revo 40 tooth Mod 1. It fits the slipper, afterall it is patterned after the Revo.

The ESC is a Monster Pro 125 amp modded with a Novak 2700uf Cap. It's hard to see in the picture, but it's secured to the rear shock tower.

I added a fan over the ESC just in case we need it when it comes to 6S setups and higher gearing. This is powered by the BEC. Power for this is picked up at the Receiver.

There is a CC BEC there that has been turned up to 6 volts. This makes the steering stronger and more responsive.

She just had her first run. I love it. It's a torque monster. It will flip on it's lid from a standing stop if it's getting good traction.

I played with the slipper some. Too loose isn't good for acceleration and too tight defeats it's purpose. I backed it off where I knew it was too loose, then tightened it, trying it each time in 1/4 turn increments. It will slip under a big drivetrain shock with how it is set now.

Can't wait until the 2 speed kit is released. Running this is like running in 1st gear. Loads of Torque, but only about 28-30mph top speed. 2nd gear should push this over 40mph.

The motor isn't struggling or loaded at all. WOT from a standstill or any speed is fine. This doesn't cog at all.

I love how efficient this is. Warmest the motor got might have been 90 degrees. The ESC was cold. Lipo's were cold.

First run on 4S 5000mah Lipo lasted 38 minutes!

Check this out.

[Serum]

Great! 6S on a monster 125 would be unique though!

what makes you think the maxx is now in 1st gear and not in 2nd?

http://www.traxxas.com/products/elec...maxx_trans.pdf

i can't seem to find any hints in that direction anywhere. can you confirm?

[johnrobholmes]

Pretty cool. So the tranny is taking it huh? I destroyed my Wheelie king rear diff the other day with a teeny 2221 outrunner. No slipper.

[lincpimp]

Serum, if you look at the parts listing it shows a number and description for the 2 speed. 1st is slightly lower at 2:1 and second is 1.16:1. Current ratio is 1.83:1.

[Serum]

the tranny of the new maxx is pretty tough John.

the wheelieking; what happened did the ringgear got loose from the cup and got damaged?

[Serum]

What are you seeing what I am missing Linc?

[lincpimp]

Here:

3rd page , #3973 & #3974

[MetalMan]

Originally Posted by johnrobholmes

Pretty cool. So the tranny is taking it huh? I destroyed my Wheelie king rear diff the other day with a teeny 2221 outrunner. No slipper.

Interesting. Shimmed right, my WK rear diff holds up fine to a 2826 710kv on 3s Lipo with direct drive. Driveshafts (including CVDs) on the other hand...

Lookin' good, sike! To me that motor seems too small for the E-Maxx, but I suppose it is just based off of my experience with lower quality (I think) outrunners that heat up more.

[sikeston34m]

On the Gear ratio's, that is correct.

1.84 is very close to the first gear ratio of 2:1, that's why I said that.

There is a difference in the wide ratio gears and the close ratio gears that are "soon to be released". I will go with the wide ratio set.

[sikeston34m]

Originally Posted by johnrobholmes

Pretty cool. So the tranny is taking it huh? I destroyed my Wheelie king rear diff the other day with a teeny 2221 outrunner. No slipper.

Yes it's going to handle it very well. This transmission it tougher built. I don't anticipate any problems with it.

I love how these diffs are. They slip less in the differential action when climbing my dirts piles. LOL

I'm gonna be putting some of that thick grease in my Revo diffs.

[johnrobholmes]

My WK probably isn't shimmed right, but it was a 4400kv outrunner on 4s, so there was a bit of load.

[sikeston34m]

Originally Posted by MetalMan

Interesting. Shimmed right, my WK rear diff holds up fine to a 2826 710kv on 3s Lipo with direct drive. Driveshafts (including CVDs) on the other hand...

Lookin' good, sike! To me that motor seems too small for the E-Maxx, but I suppose it is just based off of my experience with lower quality (I think) outrunners that heat up more.

AXI Quality is very good. Big Things come in small packages. LOL

It makes good power and the added cooling fan helps control temps. It moves a good quantity of air, especially with the higher kv. It sounds like it's screaming when the rpm's are up. A high pitch.

I've only ran it on 4S so far, we'll see how things go when I bump that up to 5S and then on to 6S.

[sikeston34m]

I just ran this on 6S. Top Speed is MUCH better at around 40mph. Temps are still well in hand.

The warmest the motor got was maybe 100 degrees. ESC was cold, Lipo's were cool. No Worries on Temps.

It doesn't seem like this motor is loaded at all with this gearing. It just screams. WeeeeEEeEEEE WEEEEEeeeeeeeee. LOL

She will wheelie at speed now and backflip if you're not easy on the trigger finger.

I really like the Mod1 gears. Mike makes some really tough pinion gears. 2 runs, no wear, and no worries. I can tell the Mod1 gears are MUCH tougher than the 32 pitch ever thought about being. If I were Transferring this much power through 32 pitch ones, they would be showing alot of wear by now.

With the way this AXI 2826/10 motor is behaving, I feel like maybe I could have went with the 8 turn motor. This 10 turn is 920kv. The 8 turn is 1130kv. We aren't lacking at all in the torque department.

This setup is very efficient. I got close to 30 minutes runtime from 6S 4000mah.

I can't wait for the 2 speed Transmission kit.

[sikeston34m]

Originally Posted by Serum

Great! 6S on a monster 125 would be unique though!

what makes you think the maxx is now in 1st gear and not in 2nd?

http://www.traxxas.com/products/elec...maxx_trans.pdf

i can't seem to find any hints in that direction anywhere. can you confirm?

Hi Serum,

Why do I get the impression you don't think the 6S will work with the Quark Monster Pro?

What has been your experience?

This setup on 6S doesn't cog. I seen it being a little jerky from a standing stop at the very start of the run. It wasn't bad at all though, and went away in the first minute or two of the run.

[lincpimp]

Most people seem to find that the 125b does not like a fully charged 6s pack. Once the voltage comes down a little the quark seems to be ok. Since your setup is obviously not drawing a ton of amps, you are most likely not overtaxing the 125b. I havea feeling that the quark is somewhat sensitive to gearing when running on 6s. Too much load and it will most likely have issues, as many have found.

Nice to hear that it is working well for you. If I put the 2826/12 in mine it should run great. Lower kv will load the esc even less, I may be able to get away with a quark 80, instead of the 125b.

Not to hijack your thread, but I just ordered another 125b and a savage ss kit. I also ordered the brushless savage chassis from mike! I may try an out runner in this, as it looks to have some more room, and mech brakes too! alo bought a pair of trakpower gold lipos, a greatplane 60hv esc with prog card, 3 more ccbec, and a sv27 6 pole boat motor to test out. It was an expensive morning! (not really as I have worked a trade with the lhs owner for most of the stuff I got)

Really like the out runner setup you did here sike, looks clean and I am sure that will run well. Are you going to stay with 6s, or step down when the 2 speed comes out? Or are you going for some insane speed!?!