My LST and Muggy Conversion Thread

[JThiessen]

Originally Posted by rawfuls

in other words that's one beautiful truck.

Want me to put some chrome rim on it....kinda like RC lingerie....!!!

Originally Posted by riverat1540

yea the diff cases do rock a bit in the bulks, but never have been a problem, i have the lst towers on mine and am yet to run it with that setup, i need longer battery straps before i can run it.

I saw that you put the LST towers on yours, and that gave me the idea to do the same. My shocks on the Mug actually rub on the bulkhead a little bit.

[riverat1540]

as did mine also stiffens up the suspension, i can drop it from much higher without it bottoming out with the lst towers plus ebay is flooded with them.

[rawfuls]

Originally Posted by JThiessen

Want me to put some chrome rim on it....kinda like RC lingerie....!!!

LOL

[bdebde]

I wrap a piece of electrical tape around the front end of the diffs so they fit tight in the bulkheads.

What Neu packs are you running? The 4100EP packs fit well in the losi battery tray (perfect actually) and I only had to drill one hole in the chassis to put the tray in there.

And yes it was a nice day today here in the Pacific Northwest (first day of spring, Yah). I had better get my Muggy back together so I can try out my 1520!

[riverat1540]

im still rocking the medusa 80mm 2000kv with great results but the 1520 would be a great step up.

[pinkpanda3310]

Looks good JT. Nice and clean.

[nitrostarter]

Originally Posted by JThiessen

Why yes it is....!
I'm wondering if I'm running out of RPM's with the 1520. I charged up the pack, and ran it again. Same story on the speed. Probably tops of 30mph. Speed calc has it hitting 50 with my gearing, and I'm getting nowhere near that. Might try to completely reset the MMM too....

Hey, you guys that have Muggy's. Do your diff's sit kinda loose in the "bulkheads"? Mine have about 1/8th inch of vertical movement in them.

Jeff, are you calculating with Muggy diffs? The ratio is taller(slower) than LST.

What pinion are you using? And 6s I take it?

I wonder whats up with the speed....

[riverat1540]

i can go as fast as the tires will let me with a stock spur and still be under 16t pinion.

[JThiessen]

Originally Posted by nitrostarter

Jeff, are you calculating with Muggy diffs? The ratio is taller(slower) than LST.

What pinion are you using? And 6s I take it?

I wonder whats up with the speed....

I used muggy diffs, 50/14 on the gears, 5S for battery, and 1/2" tire balloon. Gave me 50.XX mph on the calculator. Maybe something is wrong in the calculator....cause the truck acts like its fine, just topped out well before I'm past 1/4 throw on the trigger.

[nitrostarter]

Have you reprogrammed the MMM?

My personal preference is to use 0-.1 on the ballooning. However, I do think 14/50 is geared a tad on the low side. a 16-18t pinion should really wake it up!

[JThiessen]

Well, thanks to Hootie, I seem to have a plethora of pinions to pick from. No, I haven't touched the programming on this one since the last official software update came out (I haven't put any of the Beta stuff on it). I'm definitly in agreement on moving up to about a 18.
I must have had a number wrong the last time I ran the calculator, 'cause here is what i got this time, using a 18t pinion. Which would be absolutely perfect...

Differential Ratio: 4.090909090909091
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 50
Pinion Tooth Count: 18
Total Voltage: 18.5
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): .1
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.78 : 1
Total Ratio: 11.36364 : 1
Tire Circumference (inches): 18.38 inches (466.81 mm)
Rollout: 1.62:1
Total Motor Speed: 29600 RPM
Vehicle Speed: 45.33 mph (72.82 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

I'm actually thinking about finally pickup up an Eagletree system. I found out they are actually just down the road from me....The USB car unit looks good enough for what I need, and from what I understand, I'll need the brushless motor kit with it. Anyone have experience with that unit?

[nitrostarter]

Nice! I was thinking you were running 6s as well.

Yes, looks like the 18t pinion should really wake it up. I thought 14/50 sounded a bit slow as well.

[JThiessen]

Yep - ran it with the 18 and its much better. Might even jump up a little higher yet, but I want to run it hard through a pack frist and see what temps look like.

I swapped out the shocktowers, looked at it for a bit, tried a bunch of different body styles on it, and didn't like any of it. So I put the olds back on and just moved the shock to the inner mount hole. I'm happier with it like this, but had to try it.

Well, M'in Law is in the hospital, and i'm taking off for Montana in a week, so probably wont do much on these for a bit. Would be great to take this back to the ranch to run, but, they still have a foot of snow. With it warming up, its gonna be a sloppy mess working the moo cows this year.

[Kcaz25]

Those red 7075 T6 TRX rods are a great choice for chassis bracing, but I'd(and am using) use bigger rod ends(links). These (by Dubro)are about 20% percent bigger and are made up of harder plastic. The screw hole that attaches to the rod will need to be drill out a touch as they are too small. I highly reccomend them. I've got 12 of them on my truck LOL and haven't broke one after about a year.




The other 4 links are in the steering making 12 monster ball links in all.

Nice trucks by the way!

-Zack

[JThiessen]

Finally a bit of an update on the design. I decided to try a drop down center plate, and reversed the center diff and motor to get more of the cg to the front. Had to mock up the servo and front shaft to make sure there was clearance. Looks dooable right now. The drop is only a 1/2 inch - could go a little more. My original idea was to get it low enough that nothing was sticking up through the top - but that now seems to be a far fetched idea. I used the muggy center diff set up (1.806" tall).