My Stampede 4x4, with datalog of the Castle 3800
 

This is my Stampede 4x4. Running the Castle Sidewinder 3800kv. Trencher tires, Tekno driveshafts, modded bumpers, rpm arms, yada, yada.
http://pic20.picturetrail.com/VOL133.../395382606.jpg
http://pic20.picturetrail.com/VOL133.../395382622.jpg

Currently I'm running 11/54 gearing, a Gens 3s 5000mah 40c. Radared at 54mph. I just got my datalogger today, so of course I had to play, and the results were.
http://pic20.picturetrail.com/VOL133.../395491470.jpg

Temps were 125 esc, 130 motor, 50 ambient.

As an educated guess, I thought it was going to pull 117 amps. Not sure if you can read it, but it pulled 116.8, with a pack low voltage of 10.38 :whistle:

Of course I'm just figuring the datalogger out, but it's alot of fun.

wow i didnt think the little sct esc was good for 100 amps, very nice logs

This sytem has been very impressive, so far. I started with the esc down in the chassis, and it was getting much warmer.

Here a little vid, of it doing it's thing. This is basically the kind of driving I was doing for the log. http://www.youtube.com/watch?v=9hlVG9EeqbY

If you watch nothing else, the 1:00 minute mark is a must see. Truly displays this things power.

I'll say. :surprised:

great video

@ 0:40 :surprised: :lol:


Nice save!

I am running the same sytem in a 2wd pede. Can you say no real load... I might have to give it a try in the 4x4 pede. Once I get the rear driveshats in...

My system runs ice cold. Motor does not even get warm. I am geared for about 45. The esc seems to do fine, ran it today but I ended the run with a flasjing amber light and steering only. Was that the lvc kicking in? Battery had not been charged for a while.

I haven't seen that flasjing amber light on my CC ESCs before. Is it a new feature on the SCT system? I think it means you're having too much fun. You should make a thread in the Castle section so Patrick can chime in on it.

Think the esc took a dump...

I did post a thread, thanks sweetie.

Thanks guys, I'm glad you enjoyed. My plan is to find this motor's and esc's limits, which will lead to me testing the trucks limits. I tried to use the stock front shafts, they didn't hold up to a single backflip off the rock, go figure :) I know, you tried to say it wouldn't be enough in the 4wd :whistle: You power hungry monger :na: I haven't even had to put a better esc in yet. I don't have any ideas about what the lights mean. I haven't hit a hard cutoff, yet.

I think the new sidewinder is a pretty good esc... But mine may have had an early death.

The motor has plenty of power. Good stuff, escpecially for the price. I paid around 93 bucks shipped. You cannot beat that.

I will swap in a MM and really gear it up. Maybe low 60s. My lipo is up to the task, but I will have to setup the suspension alot better than it is now!!! And balance the tires.

This motor is IMO a monster. I split it open when I first got it. Here's the rotor, next to the only one I had laying around, a Novak. But the Novak is actually a little longer then a standard 540 rotor, like the VXL.

http://pic20.picturetrail.com/VOL133.../395161535.jpg

This thing has to be breaking records for the best bang for your buck :)

Remember that time you laughed at your friend 'cause they fell off their bike and it turned out they were really hurt and you felt bad? :whistle:

I'm flattered that you used your favorite pet name with me, but you'll have some explaining to do when _paralyzed_ finds out.

you're going down nitro?:diablo:

Seems like that is what he meant? Where is hippie? Have his eyes rolled back in his head yet?

Is that a question?

Hey it's nothing serious. I haven't recieved any packages yet.

It has a question mark doesn't it? I was using suggestive thought. And you sir, thought about it:rofl:

Nitro if your going down and not expecting a package, then....:rofl::rofl::rofl::rules::na:

Nice video man. Those new Pedes rock. I was excited to see the Monster Jam Pede till I realized it was a 2WD one. What a shame....

OK, so I'll admit, I'm a little surprised. Ran the 11/54 on SPC 8000mah 2s, 20c, almost a year old, with we'll call it 40 cycles. GPSed at 34.6mph. But what surprised me is that it pulled 116.02 amps, at 6.54volts, or at 14.5c load, it was holding 3.27 volts per cell, but again, that was well into the pack . So it's basically the same amp draw. Why this surprises me is because I thought it should have pulled more amps, with the higher voltage, using the same gearing.

http://pic20.picturetrail.com/VOL133.../395506595.jpg


I know, what a waste, to have a 4wd based vehicle, then use a 2wd vehicle to represent it, when there is a 4wd that would have done better.

I got my sc sytem going again, and ran it today till I thermalled it. Was doing alot of half throttle running on a very slick surface, drifting. Power is great, most likely leave it as in.

If they came out with 5mm shaft versions this 1410 and the 1415 would be great motors for all kinds of applications, escically the 4x4 sc trucks that are based off 10th stuff. I am pretty sure the 1415 motor geared right would make a stock emaxx go just fine!

Sounds fishy to me Asheck. Both testing out to be within one amp of each other. What amps is the ET rated for again? OTOH did it weight less with the 3s?

I am really curious to see how the drivetrian holds up to that power over time. If it holds up and doesnt self destruct it would be an excellent backup basher to my savage. It seems to have the same driving characteristics as my savage but in a much lighter and cheaper to operate package.

I do only have the 100amp version, but I think it's still pretty accurate to about 125. No, the 3s weighs substantially more.

But here's another run. Geared 13/54 SPC 8000mah 2s , radared at 41mph
Full run was 5988mah, and the lvc had not cut in. Pulled 117.35 amps.
Temps were 125 esc and motor, with ambient of 64

http://pic20.picturetrail.com/VOL133.../395509265.jpg

An expanded view of the first 4 minutes.

http://pic20.picturetrail.com/VOL133.../395509267.jpg

Me to. All I can say is I've been pretty rough on it, and it's going strong. These tires make this truck. I'm so much happier then with the other tires I've tried, Talons, 30series Badlands, and Losi 320s Zombiemax tires.

Hey asheck do you have any info, pics, whatever on the mods you did to the bumpers? The front looks like a 2wd pede rpm part?

Yeah, I actually modded these for my Slash 4x4. But have always broken plastic wheelie bars, and didn't like the functionability of the Pede front, so went with these on here. The front is a Slash 4x4, that I cut off, then screwed a RPM 2wd front bumper to. I left the handle on because the bumper will bend back relatively easy, but it then hits it, and transfers all the energy nicely.
http://pic20.picturetrail.com/VOL133.../395511186.jpg
http://pic20.picturetrail.com/VOL133.../395511189.jpg
The rear is just a Slash that I cut down, and srewed back together, like this.

http://pic20.picturetrail.com/VOL133.../395228791.jpg

I did break the plastic, at one of the screws, but it still functions fine as a wheelie bar, and I haven't been taking it easy.

So, I ran 13/54 on 3s. It's really to much for the ESC. I had temps get up to around 150, with an ambient of 40, so issues were only a warm up away. But before I geared down, I tried to test the speed today, it wouldn't let me hit full throttle . http://www.youtube.com/watch?v=6pzwnOfRV5A Before sending a broken wheel flying anyway.

This motor is an absolute beast.

For some reason, I just now saw this thread.

It's hard to see from the graphs posted, but it sounds to me like your 100A logger is not reading high enough to see the real story. If you look at the datasheets for the actual hall-effect devices these loggers use, you'll see they lose accuracy almost exponentially above their rating - there's just not much more headroom in those things.

I've 147A on a CRT.5 on 3s geared for ~35-40mph, so it's very possible your 4x4 is pulling more than 117A.

To see if your logger isn't enough, you can study the graph a bit more. Look at all the peak currents. First of all, the current waveforms should look almost exactly like the voltage waveforms at that point in time, just reversed (voltage dips while current peaks). If the voltage has a negative peak, but the current peak looks flat, then the logger is chopping the rest of the peak off. Also, take a look at all the places where the voltage is the lowest - the currents at those times should be higher in proportion. If not, the logger is limiting the reading. You could also take readings of the battery voltage dips at various points in the graph at (10A, 20A, and so on), calculate the battery internal resistance at those points , get a graph of battery resistance over load, and then see if the current draw matches voltage dips at suspect points.

BTW: If you want, zip up and attach the raw logger file. I can load it in the ET software and see the details and let you know what I find...

Thanks for the reply, Brian. Any input would greatly be appreciated.
Let's see if I get this right with the files.

I also included a little E-revo run that I did. It shows 120 amps, but it was only geared 24/68, 42mph, pretty conservative by my standards, yet I was shocked to see the amps of the 2 vehicles so close. The Stampede is half the weight, on half the voltage, same speed, within 3 amps of each other, :neutral: I have been checking the graphs, in small increments at my highest amp points, and have always seen the max amps, and the lowest voltages at the same points. But I'm very new with this, so maybe your eye will see something my doesn't.

OK, pretty sure I am running 14/58 on my 2wd pede. And I run 3s. You have a bit more reduction in your diffs vs my trans (2.72 for a pede 2wd trans vs 2.85 revo spec diff) but it is very close. I got high temos with alot of loose surface spinning but get better temps with higher traction surfaces. Must be keeping the motor loaded and in the sweet spot rpm range?

Anyways, I have a spare MM so I plan to swap it in. Pity the sidewinder sc won't do 4s as I have a very light 2wd tc that I would like to run a 1406 2y on 4s...

Not to jack a thread, but would a 3800 be good in a 2wd rustler? im buying a sw combo here soon and looking for opinions.

The only problem will be traction-

2s = Fun

3s = Insane

4s* = 2012 is your fault.

:lol:

*I don't think the SW can handle 4s, but if it could...

I run the combo on 3s in my 2wd pede. I would recommend it. For the price nothing can come close.

I'll be running 2s. but back on topic, thanks for the reassurance :D

Just out of curiosity, have you tried? I was planning on adding a bec and extra cap , just to see what kind of difference it makes with it's capabilities. But was thinking when I did, I would try 4s, just to see. Honestly my end plan is a different esc, though.

I have a feeling that the castle firmware will not allow the increased voltage. Read thru the release notes for the MM updates and you will see that after v1.28 they incorporated overvoltage protection. I have a thread about it. I have a feeling they have done this across the board.

Did a run today with 10/54 gearing, ran around 49mph
Amps dropped to 106. Temps were 145 esc, 125 motor

Really make me wonder about the earlier amp readings with the higher gearings. To only see a 1 amp difference between 11 and 13, then lose 10 by dropping to a 10.
http://pic20.picturetrail.com/VOL133.../395660930.jpg

Also did a 2s run, it was kinda slow at 33mph, and I could constantly hold wot. But amps went back up to 112

http://pic20.picturetrail.com/VOL133.../395663191.jpg