So I Have a Muggy Now!
 

I took on a muggy roller on trade for some paintball stuff and think it would be a great candidate for my next brushless creation. cant help but look at the mamba monster 2200 system for this setup on 5-6s but gearing options have me wondering how low i will be able to gear on the pinion with a stock spur due to space issues with the motor and center brace. id like to gear for around 45-50 on this truck. also wondering if it is best to run mechanical brakes on a truck this size or just use the electric brakes get the slipperential, im leaning towards the slipperential if it will fit but could use some input. and any tips from previous build would really be appreciated
Thanks

http://i41.tinypic.com/vr4h1t.jpg

Another Muggy
 

The Muggy is a great basher. Mine's on 5s with a 1515 2.5d/MMM. It's too heavy to be a serious racer but it rips in a park or constuction site type of environment. The slipperential is probably a good way to go. Lose the mechanical brakes, the MMM has awesome brakes. You'll either need a hardened chassis or make a brace like mine, otherwise you'll bend the chassis on a hard landing.

yea it definatly has the power to stop it as well as it was strong enough to snap its own shaft on my crt, that is why i suggested the slipperential

The 2200 system would be great in there, perhaps a bit too crazy on 6s. I run a finned Neu (1515 2.5D) on 6s, and I think I have had 12/46 with no fit problems. I now run 12/48 or 13/48 using losi 48t spur in Innovative rc chassis. As ilpufxit said, the stock chassis is the weakest link (why I have the Innovative one). Electric brakes work fine, even with my MGM which does not have as strong brakes as the MMM (just gotta crank em up). Check my sig for more info on my Muggy, links to the build thread.

I'm currently running an 80mm MedUsa (2,000 KV) on 4s with a 16T pinion and a MMM and it's an absolute power house, it's actually ripping my tires apart. The Muggy is a good RC, I've had a ton of fun with mine.

Innovativerc will soon have a chassis for brushless muggy's. It'll work with rc-m's motor mount and battery tray, and probably also come with a single servo mount.

Do the steering mod before you do anything else. Replace the bushings with bearings and replace the steering link with a Jato turnbuckle.

Does anyone else make a chassis other than innovative?

Also, what size are the bearings in the steering? Are they std size, look bigger than the metric bearings...

My muggy now rolls, and I finished the battery tray and esc mounts last night.

I have a 49t spur on it (had to clearance the chassis and top plate to get that to fit:oh: ) and with the hacker c50 11xl I will run a 15t pinion (kv is 1476, and I will run 6s). I like the idea of the 50t slipperential in this but I think the stock chassis would need something like this: http://www.rc-monster.com/proddetail...d=rcmxraybrace

That brace would lift the center diff up enough to clear the larger spur, and give the chassis some added strength in the weak area behind the diff (my stock chassis is bent too, slightly). Only issue would be that the front and rear chassis braces would have to be modded or completely remade. Maybe a turnbuckle style would be easy to incorporate? Not sure of the strength though. I guess the chassis plate brace could just fit around the bottom of the braces, instead of sandwiching between them and the chassis. I would have to drill more holes in the chassis to mount it...

I may pick up a new stock chassis and give it a try!

I don't know of any other Muggy chassis other than stock or from InnovativeRc.
I used these bearings for the steering: 6x10x3mm.

Thanks Bart, that is an odd size for bearings... I need a few so it is time to search some out!

There is also the hard anodized chassis, a losi option part, it is much better than stock as well.

Really... I could not find any material info on it. I am guessing the innovative chassis is better than the hard anoed losi chassis, and the price is not much different...

I think I will try my hand at making a chassis brace like the RCM one... It should help, and I have some 4mm 6061 sheet laying around. I will pick up another stock chassis, I do not feel like taking my muggy apart, just spent 3 days rebuilding it!!!

i also have seen the hardened chassis and will do the steering mod this build is going to kind of drag on as money is low right now but when i get close i make take the system out of my crt to run it and see which one i like driving at the moment. but will show my build along the way,

For the bearings, I think AvidRC carries them (I need them badly for mine) Also check to make sure your turnbuckles are all tight, I had some serious slop in my steering to the point that it wouldn't turn at a dead stop (the servo would just take up the slack).

What's the point in putting a bigger spur in the Muggy? You can easily adjust the gear ratio with pinion gears.

It was what i had at the time, so I put it in. I will say that it is super quiet with the 15/49 combo. I thought it was a plastic spur when I ran it. I can also say that 50k ofna diff fluid is way too light for the center diff. I hope I have something heavier...

I have some 30k fluid in my CD and it's way too loose. It'll still almost wheelie over backwards, but I get some serious unloading. I've got some 60k sitting here but I'm thinking I'll step up to some 200k or something uber thick like that.

really that thick?
i was thinking 50 would be plenty, as i only run 30k in my crt. 200 seems pretty thick maybe id try 100k first

I think I'd go for the thicker fluid because it will loosen up over time, and I like my diffs pretty solid.

do u have the aluminum cases? oil that thick can cause things to flex under high speed slip situations. but thanks for the tips i think i will start at 50k and adjust from there

Mine are the stock plastic cases, they seem to be pretty tough so I haven't bothered with aluminum cases.

I am using the hd cases in the the center and rear. 50k fluid is like water... Not sure if I have a bad batch, it is thick as all hell in the bottle but it feels like nothing in the diff... Maybe I need to make sure that it is slap full? It must be at least 90% full now.

Thought i would post an update my muggy is almost complete i just need to get rid of my 1515 1y and get a 1521 1y or even a 1521 1.5d would be cool. so here are some pics minus motor ill be running turnigy 5000 6s 30c should be pretty sweet, i swapped over my crt motor mount and it fit well and lets me use my top plate for my esc. was running it on 5s zippy h and the 1515 1y but it was causing the batteries to go to crap and eventually it did, they were just old zippies plenty of use from the truggy and beat pretty hard for a 15c pack,lol but i think i like the muggy more than the truggy plus the parts are cheaper and i dont have to buy a whole sheet of parts to get a wing mount.:party:
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I run a CC 2200 in mine on 5s and 6s and its never overheated. I cant remember the pinion but I think its a 25 and a kyosho 45t spur. It was those big old tires that was killing mine. Best upgrade I did to it was on the top of the bulk, furthest rear wing mount put in 1 size larger (cant remember dang standard sizes) and 1/2" longer Tony screws. I land that thing on the wing (most jumps) and it just takes it. Really made the rear strong.

The wheels and tires are what really kill the Muggy in terms of performance but I like it with those big tires on it. I put Rulux wheels with Badlands on mine and I don't like it that way, I liked it better as a big, lumbering monstrosity. The stock tires lasted me over a year and were still alright but 6s power was enough to rip them to shreds.

If you keep the stock tires the 1515 should be plenty, but a 1521 is going to be crazy even with the stock tires. I'd look into running a 1Y on 4s or 5s just to keep it tame enough to use.

yea im pretty tame but love the power on tap and like to show off a lil bit when im just having fun, ive ran it on 5s with a 2200 and know it needs more power for what im comfortable with but maybe 5 s would be good for the muggy with a 1521 but its a big truck and deserves a big battery, i know it inside and out and am not afraid to do rebuild it if it breaks i just love the break neck speed of raw brushless power and want to show it off with my muggy:whip:

<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i140.photobucket.com/player.swf?file=http://vid140.photobucket.com/albums/r37/Unsullied_Spy/Muggy6s.flv">

A 1521 is more powerful than that motor^

Plenty of power on tap won't be a problem for a 1521, keeping the tires in 1 piece and keeping the front wheels on the ground will be. Throttle control is everything and having power to spare is nice, so if you can keep it tame enough to use then that's a great motor! The Muggy is a very tough truck. If you put the diffs in the LST aluminum cases and keep them well-greased they put up to a LOT of abuse and despite how hard I've beaten mine the entire drivetrain is still solid. The only failure mine has had so far was the front diff because the plastic case cracked and let the ring and pinion slip.

A stock Muggy with RPM arms and Lunsford titanium turnbuckles in the arms is almost indestructible. The aluminum diff cases and the new arms are really the only things I've done to mine as far as durability and despite being beaten mercilessly on a constant basis it continues to hold up to the abuse very well. The Muggy is an excellent truck, after seeing mine my LHS has finally decided to start stocking them :yes:

yea the lst cases were the first to go in. i might have found a motor on another forum im waiting for the guy to get back to me

Well i got my battery yesterday and decided to give the 1515 1y a chance so i could at least see it run on 6s, i got a 11tooth pinion which was the smallest that would fit without center brace trimming. well i was suprized how great it ran, peak temp after hard grass running was 168 wheelies to no end. i can copy unsullied spy's back fip no problem actually it was the first thing i did after i saw everything was rolling smooth. its faster than it can be controlled top speed and im very happy with my build. battery temp got up to 110 with turnigy 30c 6s 5000mah. mamba fan ran alot but that is to be expected. its amazing to see something so heavy flug around like a ragdoll. the only problem i have is over excessive tire ballooning in the front even with 100k in the center. but i have some spiderwire fishing line im going to wrap on the tires to see what happens as i ripped a tire open when it ballooned and hit the body. but i replaced it and still have 2 more spares:party:
http://i25.tinypic.com/2kmvqo.jpg
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That sounds hot for a 1515, but I suppose on 6s in the grass it sounds right. In that video I was running a 16T pinion, 6s certainly has potential for some serious power. Your Muggy is coming along quite nicely, any plans to go with RPM arms though? I snapped stockers all the time until I finally dished out the money for RPM arms. Just beware that you will need Lunsford turnbuckles for them, the stock ones bend and shear very easily.

Looks good. Why do you have the ESC mounted there and not behind the battery?

i was always told to stay under 180 with the neu motors. but it wasnt nearly as hard on it as it was the speed control, which went in flames today so ill get the mamba replaced, and wait for a medusa 80m 2000 to roll around or my ideal motor the 1521 1y. ill post pics later, the reason the esc is so high is that my top plate for my jammin crt mount i have in there from my truggy, it has a esc mount on the back so i figured better up high than right in everything i kick up, so im on hold now, bur it was running great, just uder too much pressure so a bigger motor is the way to go. ill post pics later it was a little fire ball untill i disconected the battey and blew out the flames. the truck died, i took the body off slid the switch to off then back on and it suddenly caught fire so there must have been a short somewhere thank god my new battery didnt go up as well.:gasp:

Is that a Cadillac hood ornament on that Muggy? LOL, check the title of my Muggy thread in my signature.

well i sent the mamba monster in for replacement thank god for warranties, i have a used 80mm 2000kv medusa on the way and also a 1521 i plan on buying but it needs bearings. also was offered a 1527 1500kv motor but think that may be overkill. i just hope i dont burn another controller up. i think it was just all the strain from the 1515 1y trying to get up to speed under 6s. i was beating the truck pretty hard. i took some spiderwire 20lb line and wrapped 4 places on each front tire and it was soon after that it died. but with the tires not ballooning it was way harder to get the front end up at speed and was just about topping off on speed before the rears started to balloon. i need a slower motor with more torque so im drawing less amps. if i get the neu ill get bearings for it and run the medusa in a boat with a water jacket. either way the muggy is getting there.

so i now have the medusa 80mm 2000k i bought for 50bucks shipped on ebay, in the muggy with a 11t pinion and a integy heatsink/w 7.2v fan. i also ordered a rollcage and got it mounted, i love how it completly hides under the body. just waiting on my mmm to be sent back from castle and im ready to roll again. hopefully no more problems for a while. ill get pics soon

I'm wondering, what kind of gearring would you suggest for a Muggy using a 2200kv MMM combo?
I've tried 11/48 (using a Innovative RC chassis, with a robinson spur on the center diff.) on 4S Lipo, it worked quite well, appart from the top speed beeing rubbish.
But when I tried 6S Lipo, the controller became really hot. (I use the same Lipo's in my E-revo brushless edition, with the 18/54 gearing, and that works perfect. so the lipo's are good.)

i ran the muggy with 11/46 gearing with the 2200kv 1515 and it was too hot of a setup for both the motor and the speed control in the long run, this is how i sent my mmmv3 in flames just recently, if u are set on running the muggy with this motor i would run a quality 5s 5000mah pack and gear about the same to start. i still want to run 6s however so have opted to run a medusa 80mm can in the 2000kv flavor with a heatsink and fan and see where that gets me it seems to be working well for UnsulliedSpy but my ideal motor for 6s would be a neu 1521 1y/f which is the same as the 1515 1y 2200kv but a longer can for more torque and cooler running less rpms per volt, and easier on the speed control i hope

I run the 1521 1y on 6s im my muggy with a MMM. Not sure on the gearing, but I think it is 15/49. Anyways it has plenty of power. Currently running badlands on dish wheels.

I cant wait till i can find one at a decent price i can afford at the moment.

Like said, I'm using the same batteries in my ERBE, so I actually want to use 6s Lipo. (have 2 sets of batteries atm, with a 3rd set on its way.)

then i reccomend a lower kv motor something like a neu 1521 1y or a medusa 80mm 2000kv as the 1515 1y is not enough motor to push the truggy on 6s without heat issues or damage to the controller in my experiance

nice truck!! I really like that muggy.
you should try to move the battery tray a bit forward, to get the mamba directly onto the chassis. Placed on the center diff, the center of gravity is too hight. try that out, hadling will increase a lot. you can take some lexan to make a shield to protect the esc from dirt, water etc.