Mamba Max- "don't try this at home"

[glassdoctor]

Heres a thread to expose the "out of spec" abuse to the MM... at least the abuse I put on mine.

This is just a start for me... I have bigger plans of torture.... muah ha ha ha ha ha :eek:

Note the disclaimer that much of this is out of spec, not under warranty and you do so at your own risk... blah blah blah.

So far I have run one in my 1/8 buggy conversion with the Neu 1512 motor. It has performed awesome... not a glitch and the hottest I have seen it in this app has been 150 on the sinks.

Actually I have seen it hotter in my B4 with a 4600 in race conditions. Both motor and esc got to 160s then.

I have run the 1/8 very hard in the street and in a dirt lot (not a prepped or stick surface) and have barely made it sweat. Soon I will get it on the track and really see what the MM has. :cool:

until then boys and girls.........................

[GTB_USER_ERIK]

Wheres the beef :confused:

[glassdoctor]

1/8 buggy and truggy on 4s and a 1500w motor... that's the beef. It's jsut a work in progress so far. :)

MM survived bashing... next is racing. Honestly I will be shocked if the MM survives (doesn't thermal etc) on the track.

More motors will be tested also... the same ones that thermalled and blew up three other speedos... a hacker, mgm, mtroniks.

But I'm not doing that until after racing this weekend.

BTW this is an open invitation for anyone who is running the MM with "other" motors or in big vehicles to post results.

[tcolesen]

This should be interesting. I'm waiting for my next paycheck so I can get the 4s 6300mah 15C battery setup from Maxamps, then I'll let hell break loose on the Mamba Max using the 8L. It should suck some good current, so I'll make sure to stick my Eagle Tree MicroPower data logger on there.

Will you be sticking a fan over the MM during testing? One guy has mentioned that a fan has lowered his temps by 30-40 deg. F with it on his E-Revo.

[GordonFreeman]

Dang, I was thinking about trying it in my 1/8 4S 540C 9L buggy, but am afraid it won't like the 4S part. When I was running that buggy (Mtroniks Truck solder posts failed) it would only read about 850 Watt on my meter.

I can heatsink and fan the piss out of it, but I don't know it the voltage is a problem.

[GTB_USER_ERIK]

here's my beef.
Nitro MT2 converted to electric.
3s 5000mh 11.1
CC MM 5700
Pro-lines Gladiator tires
66t spur / 15t pinion
for a FDR of 12.84
fan on the esc.
so far this has survived repeated runs of nearly 60mph. ;)

[cart213]

I can heatsink and fan the piss out of it, but I don't know it the voltage is a problem.

For 4s lipos, you'll just need to disable the bec on the max and then use a receiver pack or a ubec.

[glassdoctor]

Correct... run an external bec/rx pack and there is no problem running 4s.

[Muck]

I wonder how it would do with an Xl size motor or more importantly I'd like to try it with the Neu 1515 1.5Y I just got, but I scared.

[tcolesen]

What is there to be scared of? The Max has a temperature cutoff, and even before it gets to that you can check the temp. on it. If it runs hot, try a fan over the heatsink.

[Rtsbasic]

I'm very curious to see how it would fare with an XL Feigao. I know this is "Monster" turf now, but I'd still be curious to see how long it takes to thermal, and if it has the same "punch" as a MT-spec controller.

[Muck]

What is there to be scared of? The Max has a temperature cutoff, and even before it gets to that you can check the temp. on it. If it runs hot, try a fan over the heatsink.

I guess I'm scared because I'd hate to see smoke from a fairly new controller. I will probably run a fan regardless of how hot it is. What settings if any should I change?

[tcolesen]

It shouldn't smoke... But to prevent excess heat, you can use low timing, low startup power, a high traction control percentage, and the lowest brake setting you can (but still have strong enough brakes).

[glassdoctor]

I am running mine with a Neu 1512 in my buggy, and I have a 1515 in a truggy that will be run this weekend. Don't be scared of the neu motors...b e scared of the feigao and hackers.

That's what I have not done yet... run the MM with my hacker that killed (or thermals) all my other speedos.

BTW, the big motors want high start power. Shawn may clarify this, but he told me to set it that way for my buggy/neu 1512.

[glassdoctor]

but I'd still be curious to see if it has the same "punch" as a MT-spec controller.

Compared to my Mtroniks truck, I think my MM runs my buggy better... faster and punchy...er.

[glassdoctor]

I got some track time with the MM and my 1/8 buggy and truggy. Guess what? No smoke.... no thermals.... no fans.....


WOW....

I got the motors pretty smoking hot after a solid half hour of track time... no stopping... but the MM stayed nice and cool. I did run a fan in the truggy just to see and it did lower the heatsink temps. But even without the fan I don't think it got about 160ish.

That's cooler than it runs in my XX4 with 2s lipo and 7700 motor. I got the MM to 195 in that.

[TheSteve]

The Max is overbuilt, and it shows. It truly does have incredible potential when used with the right motor/battery options. It has more fets that have lower on resistance then competitors ESC's rated for much higher current.

[glassdoctor]

I really want to try iit with my Hacker motor now and see what happens. Some of use have had trouble getting something to work in these 1/8... like RRocket etc...

It will be impressive if the MM can do what many others have failed trying to do.

Right now I think part of the success is the Neu motors, but I am still kinda shocked...

What's up Mr Palmer?

hey... why does my MM run cooler in my 8 lb buggy than my 3 lb buggy? Must be the whole high voltage/low current thing huh..... sweet.

[starluckrc]

I tried 3S lipo on a Maxximum at RC Madness last month without the bec disabled. That thermaled things in one lap. I think the higher voltage helps. Once I get a new UBEC I'll resume testing with bec disabled and higher voltages. You would think the 4-pole motor would work it harder. The Mtroniks Truck esc handled things fine even with the bec, and the motor came off the track barely above ambient temperature after a 5 minute heat. I nice switching bec that could take up to 5 or 6S built into the esc would be about the only thing I would like to see...........and what I would definitely be a big plus in the Monster Max.

[glassdoctor]

I agree... it would be nice to have a "monster" bec built in. I have a koolflight? ubec that's pretty big and one from dualsky that's smaller.

If they don't have one built in they should at least make a nice one that would mount to the side of the controller or something... a "factory" option piece.

Was that a Maxximum in a 1/8 buggy? Isn't that a 4 pole motor also?

I wish I could get my motors to run cooler. I don't know yet what I am doing to them but I can really cook em good in race conditions.

[glassdoctor]

Back on topic, I raced the Mamba max today in 1/8 buggy and truggy class.

I don't have good detailed data to share... I missed half of the day and things were way too hectic for me... broke my buggy (front knuckle) and was wrenching etc and barely managed to keep the cars running. Next time...

I had the Mamba get hot one run in the truggy when I changed gearing. I may have had the mesh tight, etc... but the mamba came off the track at 230... no fan. A couple days ago I only got it in the 160s or so.

So I put a fan on it and geared back down 2 teeth like it was before. After 15 minute main it was under 100 by the time I got the body off etc and temped it. Motor was 175.

I got 2nd in truggy class with the mamba max, neu 1515 1700kv motor, maxamps 12000mah lipos, geared 12/52.

It ran noticably faster geared 14/52... I liked that a lot better and it looked jsut sick on the track, but I ddin't get a chance to duplicate a run to see if the high temp was a fluke or not. I think a fan or some software tweaks would have cured that. But I geared back to 12/52 just to be safe cause I had no time to mess with it.

My buggy ran awesome and I would have placed high in the A main with it but the broken knuckle didn't hold up.... tried a cob job repair but it broke again about 15 min into the race.

I definitely have more R&D to do with this stuff... sorry I didn't get it done this time.

[GTB_USER_ERIK]

Wow, just the fact that you were able to get those temps is awsome.
I took my system to the track yesterday, I didnt get the chance to do any compitive racing, but I did keep track of my temps, and after playing around with my gearing. I changed from 15/66, to 17/67 I came down 15* Degrees on the Motor, and 12 Degrees on the ESC. this makes me feel more confident, since this upcoming Friday is going to my first 'Official Race Night' with this system.

Peace and goodwill :D
And the only imporant part for me is the finish, I want to finish ;)

[glassdoctor]

Is that in the MT2?

[GTB_USER_ERIK]

Yes it is.