MM on 5s?

[mriccucci]

Ok im wondering what the max rating on the MM is and if its capable of 5 or 6s at all? Is there a mod that makes this possible. I have a newer controller and i am running on 4s with a CCBEC.

[brushlessboy16]

you might get lucky with 5s, i did, but 6s is a NO-NO

[tc3_racer_001]

5s a123, not 5s lipo... u can try but i wouldnt bother imo. 6s is 2x what they were originally designed to run on...not a good idea unless you like castle customer service and the post office. both of which i try to avoid! (cause it means ive broken it!)

[mriccucci]

Thats what i thought, man i hate waiting on things (MMM) what to do now.......

[brushlessboy16]

my mm runs fine on 5s :D

[riceman]

At the moment three of the TeknoRC V3 8ight test truggies and one 8ight buggy are running 6S lipos through a Mamba Max with good success. No mods with the exception of adding a fan. Two race programs and a few practice nights and so far no issues. The only thing to be careful of is to monitor run times as there is no LVC enabled when running 6S. The intent is to get as much experience with different motor/battery combinations and hopefully the controller technology will eventually catch up.

[brushlessboy16]

i dont get how when the components are rated for 25v

[tc3_racer_001]

riceman how is this possible. i would like to see some eagle tree data or videos... i dont believe you at the moment sorry!

the capacitors are rated @ 25v... so 4.2x6 = 25.2, and when you brake etc. it creates spikes.... just seems unplausible.

[brushlessboy16]

^^ thats what im saying :D, unless they are running a clutch and mech brakes

[Matthew_Armeni]

I run for Tekno, I run 6s through my MM in my Losi 8T. The internal components are capable of 26v, the caps are 25v. Yes, we are pushing the caps, but the internals are fine. Check out Castles older boat controllers like the barracuda, same as the MM but with 35v caps, they clearly say 6s is ok as long as you disconnect the internal BEC. If you want video check out the one riceman posted. The old chevy truck is me running above setup with a Medusa 60mm 1300kv motor, the green truck is running a MM, 6s, 1515 3D.
Yes, we are running clutches and mechanical brakes. Braking and gassing it hard create amp spike, not voltage spikes. Voltage will drop when you gas it hard.
If you want to run 6s turn the voltage cutoff off, and put the arming time to the lowest, and make sure you run a motor that should be run on 6s, not a 1515 1Y for example. something between 1300kv and 1500kv and you'll be fine. If you're really worried about the caps, send it to griffinru, he'll fix you up.

Forgot the video.

[brushlessboy16]

braking spikes are voltage...regen braking
the clutch gets rid of that though :D

[riceman]

Originally Posted by tc3_racer_001

riceman how is this possible. i would like to see some eagle tree data or videos... i dont believe you at the moment sorry!

No need to be sorry. I wouldn't have believed it either if I didn't try it myself. As Matthew already pointed out I posted some video of a race qualifier with two of the three Tekno vehicles I mentioned. The orange car featured is not one of them. It's running 6S but with a Monster Max. The third one I was referring to is mine running 6S on a Mamba Max but I was not racing that day. Luckily I was able to show up for a little bit to take the video. If Eagle Tree helps, here is some data I collected when I first put my motor battery combo together. Tekno Neu edition 1515 3D, Zippy 6S 5000Mah lipo and Mamba Max. The first half of the graph is simulated race - repeated acceleration and braking. The second half of the graph are WOT runs.

Originally Posted by tc3_racer_001

the capacitors are rated @ 25v... so 4.2x6 = 25.2, and when you brake etc. it creates spikes.... just seems unplausible.

Again, as Matthew stated, we are all running clutches and mechanical brakes. The only spikes you see on the chart are from acceleration. No braking spikes. So while it may seem "unplausible" - it's definitely not impossible. And to reiterate, I originally posted to respond to mriccucci's original question of whether the MM was capable of 6S.

[brushlessboy16]

I stand corrected :D

[DLS II]

Hi, Mike's working on my MP-6 right now-installing a Rimfire 42-60-600 in place of the center diff. I've got a MM. Could I run 6s A123? Thanks, Don

[brushlessboy16]

no, you will have braking spikes, i just sold a Direct drive 1`/8 scale its will might run hot, mine did on 5s lipo


I have a big 50-55 outrunner if u need it