PLEASE HELP ME!! (pick out setup)

[mk351e]

Originally Posted by Finnster

BTW, are you using the 18T pinion when you are smoking the ESCs? Are you running 40 series tires? How hot is the motor? Could be that you are just way overgeared and putting too much stress on the esc and smoking it. The motor may be staying coolish, but the esc will fry. I would have expected those batts to cook a bit, but if they are staying cool then perhaps you are not stressing them too much. Maybe.. Could be linc is right too. IDK from the provided info.

If you back down on the speed/gearing a bit, your setup should be fine. Pavement is a pretty easy place to drive. Grass driving gets things really cooking. Use trug/maxx sized tires and that will help a lot as well. If you want more, something will have to change.
The only muggy I drive was still nitro, and it was a big fat bitch. Takes alot to get those moving. As linc describes his setup, just for mid 40s it takes a ton of power, and it works the system pretty good.

If I was doing a Muggy for mid 50s reliably, i would go 8S (30C 4000mah+), 1521, and an MGM. I like to over-engineer FWIW, but I don't blow my $hit up either. Good luck trying to keep that hellcat under control tho

My runs are always on a smooth parking lot - no grass or dirt (I intend to get it on dirt someday). Not running 40 series, as I don't know of a tire that can take this level of abuse in that size. I'm running HPI phaltlines, which are street tires slightly larger than standard truggy tires. I'm running a 12T pinion - 18T simply doesn't work. I can't go smaller than 12 though, it won't reach the spur. The motor temp is very dependent on weather. If it hits 170, I stop, but that only happens if the ambient is 70+. My battery has never gone past 115, and the MMM fan is almost always on, regardless of outside temp.

[mk351e]

Originally Posted by Finnster

Where in NJ are you? There are tons of dudes around there, and perhaps someone can look at it in person. Even hook up an eagletree and get some good info instead of making a bunch of guesses.

I'm in Old Bridge and willing to drive some at this point!

[Finnster]

Damn dude.. a 12T isn't that crazy on those tires.... Have you tried taking the punch control off? Maybe there is some weird setting like timing etc?
Seems like something else is amiss...

[mk351e]

Originally Posted by Finnster

Damn dude.. a 12T isn't that crazy on those tires.... Have you tried taking the punch control off? Maybe there is some weird setting like timing etc?
Seems like some else is amiss...

yep, punch control is WAY down - 40%, timing is normal, brake power at 50%, reverse at 30%. Wiring and gear mesh inspected a thousand times, and on every failure, nothing was even being used hard! This is why me and everyone at castle can't figure out what the hell is wrong, for the last YEAR.

And as much as I would love to just get an 8S MGM and a Neu 1527, and the most expensive 6S battery I can, I just took a MASSIVE pay cut at work, so I'm screwed. Big time. Oh, and I need 2 new sets of tires, and I really would like to buy the parts to convert my hyper 7. Oh, and it too needs 2 sets of tires. Lame.

[bdebde]

If I wanted 55 out of my Muggy I would go the route as Finnster said, 8s and 1521, that why I said higher voltage on earlier post. I have found, like Linc, that about 45 is max with a moderate 6s battery (Neu 4300 25c) and 1515. I gear for about 40 with my set up and can drive it all day.

[lincpimp]

Originally Posted by mk351e

What the hell took you so long dude?? I always look for your responses! I guess people are right, and I should step the battery up - zippy has a 5000 6S 30C, so I'll get that. However, why is it that battery temps have always been good for me, depsite the low C rating? Is it because I have punch control set way high (or was it low - just so that I can only pull a wheelie from a hard start) and brake power at only like 50%, or is the C rating very conservative on this enerland based pack??

Also, while I like the idea of 6S, as I believe it's better to push the truck with voltage instead of current (which may be completely wrong), is 6S killing ESC's ya think? Is 5S safer for it, despite the rating?

I would go for the battery you suggested. It is about the cheapest way to do some swapping. Higher voltage is always better. Now do you run the truck at full throttle all of the time, or do you spend alot of time at partial throttle?

[mk351e]

Originally Posted by lincpimp

I would go for the battery you suggested. It is about the cheapest way to do some swapping. Higher voltage is always better. Now do you run the truck at full throttle all of the time, or do you spend alot of time at partial throttle?

mostly WOT in parking lots. I admit, I can't get enough of it; watching this truck go that fast is like crack! However, I do kind of want to avoid going to the 1521 if I can; at this point if everyone agress I need to lower the speed then I'll have to deal with it I guess, but the easiest thing to do is go Zippy 6S, RX8/T8 combo, so if it means lowering speed, then ok.

Here why I don't want a 1521: I have to seal the can, grind the shaft, wait a while to get it, and it will be the most expensive option. If it really will achieve something, then I'll do it, but the tekin combo is easier and cheaper.

[E-Revonut]

Well you already have a mmm right? Even if it's out of warranty it's $70 to get it fixed. A neu 1521 1y is $275 new, so for $345 you'd be set. The rx8 combo is the same price but doesn't come with the hotwire, that's like an extra $35.

[JThiessen]

I think you are looking for a technical excuse to buy yourself an RX-8. Nothing really wrong with that at this point - we have all done it when something new comes along. I'd just hate to see you posting on here in two months with the same symptoms on your new system. I too am tempted to come up with a reason to buy one of them!
You have been given many examples of similar setups that run the way you want yours to, I think maybe the key is driving style as you seem to run yours somewhat different than most of us. I'm also suspicious of when you stated it really is dependant on ambient temps. Unless you are running in 100+ degree temps (and on hot pavement) for an extended period, it shouldn't put your system into an overheated state. I havent re-read the thread to check this, but how well is your body vented? Maybe its something as simple as that? Try doing a few runs with the body off and measure the temps.

Like I said in my pm to you, my Flux runs very well on 6S, and its about as close as you can get to weight and motor set up to your muggy, and its geared for about the same speed.

I'm sort of in the same spot as you are. I'm setting up a HV Muggy for about 35-40mph. From the beginning I was having a lot of temperature issues caused by high amp draws. I switched from a 80mm medusa to a Neu 1521, and still had temp issues and high amp draws. The Muggy would still fly though. I even test ran a 60mm medusa in the Muggy, and it would still fly. Like someone stated beore, these brushless motors will do about anything. They'll just pull as must amps as they need and are supplied. Small motors will heat up with these amp draws and larger motors will stay cooler.

I rebuilt my diffs a few times to check for any binding issues. I didn't find any issues with them at all. It took me a few months untill recently I found a setscrew was missing in the rear right cvd. The pin in the cvd had come out and was causing some serious binding. Now the cvd is bent and useless. I'm waiting for some new cvds to see if my problems are resolved.

I was told in this forum a few times I probably had binding issues. Just took me a while to find them.

Also, I found the eagletree datalogger was a big help. really lets you know whats going on in your setup. Probably a better investment than getting the RX8. I have recorded a high of 4000watts (geared for 40mph and with binding in the drivetrain).

[lincpimp]

Just try a new battery... Might cure all of the esc heat issues.

[mk351e]

Originally Posted by E-Revonut

Well you already have a mmm right? Even if it's out of warranty it's $70 to get it fixed. A neu 1521 1y is $275 new, so for $345 you'd be set. The rx8 combo is the same price but doesn't come with the hotwire, that's like an extra $35.

My MMM is for sale no matter what; I know people love them and they work, but I'm just tired of it. Yes, Castle is a great company, and yes, Patrick always does the right thing, but no, mine never really worked, AND it took out a $135 servo with it once. The MMM literally MELTED a Futaba S9351! Turns out I don't really need hotwire - I now know what it does, and I just don't really need all that.

As for pricing, I figure I can sell my Tekno Neu and MMM (it would be a new unit) for about the same price as an RX8 combo.

[mk351e]

Originally Posted by JThiessen

I think you are looking for a technical excuse to buy yourself an RX-8. Nothing really wrong with that at this point - we have all done it when something new comes along. I'd just hate to see you posting on here in two months with the same symptoms on your new system. I too am tempted to come up with a reason to buy one of them!
You have been given many examples of similar setups that run the way you want yours to, I think maybe the key is driving style as you seem to run yours somewhat different than most of us. I'm also suspicious of when you stated it really is dependant on ambient temps. Unless you are running in 100+ degree temps (and on hot pavement) for an extended period, it shouldn't put your system into an overheated state. I havent re-read the thread to check this, but how well is your body vented? Maybe its something as simple as that? Try doing a few runs with the body off and measure the temps.

Like I said in my pm to you, my Flux runs very well on 6S, and its about as close as you can get to weight and motor set up to your muggy, and its geared for about the same speed.

You're right; sort of. It's not that I'm looking to buy the RX8; I'm looking for someone to tell me I shouldn't, and for what reason. I'm DONE with the MMM! I suppose I lack the patience of others? And don't worry, if I'm posting about the same crap in 2 months from now with the RX8, NASA's telescopes are gonna see my Muggy flying into outer space after I punt the damn thing!

My body is not vented well; I can't keep a working MMM long enough to start playing with that stuff. It does need to be vented. Temps aren't too different with body on and body off. Also, I can't comment on how much ambients have truly affected my temps, as I rarely have a working MMM. In 12 months of initial ownership, I only have maybe 10 packs through all 5 or 6 controllers.

[JThiessen]

Originally Posted by mk351e

You're right; sort of. It's not that I'm looking to buy the RX8; I'm looking for someone to tell me I shouldn't, and for what reason. .

And we'd be hard pressed to give any valid reasons to not get that system - looks great so far. I've seen your frustrations with my B'in Law and his HV system - its hard to keep him patient, and help him keep his costs down. It's definitley very frustrating to have gone through the issues you have. Hope it works out....

[nitrostarter]

You want frustrations? Try electric boating... LOL I sold off almost all of it because of the frustration and wasting of money...



Good luck with your setup!