Making a LST2 into a Truggy
 

I have to wait till Feb to start my 1/5 Savy build so In the mean time heres whats happening on my work bench.

A couple buddys of mine recently have purchased truggys, one has a Associsted RC8T and the other has a Losi 8ightT 2.0 RTR. I really like the losi, the 454 mill is POTENT and the truggy has incredible steering and durability but enough of that. They are after me to get a truggy and I don't wish to go outside my 10RC limit so I've decided to make one of my LST2's into a NitroTugggy killer ?

The truck as is now has a 3mm full Carbon fiber chassis kit so It's considerably lighter than stock, roughly 10-12oz of shedded weight. I will be using a Losi Smart Diff with Plastic 45T spur in the center diff assembly. I'm re-using my RCM 3.3 Revo Motor mount and my newly aquired 1518 1Y from Castle and will be running on 5s 3300mah 40C Zippys. I really wanted mechanical brakes but the chassis will be stuffed as is now and this Fat Bastard would rather have Reverse anyway. Climbing down from the drivers stand to get the Truggy(any RC) out of a jam that a 1second reverse manuver can rememdy sucks when your chubby or skinny.

I have to cut a new center skid plate because the motor and CD will be mounted low as possible and slightly off center, the center shafts will run level as they exit the diffs. The battery will be mounted on the upper chassis plate just off the side of center, hopeing with the weight being low and pretty much centered the handleing should be excellent ?

I have ordered all the parts nessasary to "Muggify" the dampening department and even found Aluminum Muggy shock bodies. I wanted the plastic bodies but the aluminum ones were only 11.49 a pair, couldn't resist and they'll last much longer. I also ordered a set of mounted VTR Calibers in M3 and a 17mm hub set(ghetto cheap at 12.00 for comlete set) and a Losi Truggy bodie to screw w/people.

Once I get the center skid cut and get the CD mounted up and make the center drive shafts I'll post some pictures.

Any questions or input I'm open to advice and suggestions.

Sounds like a cool project..I almost bought a hoped up LST2 for just bashing..

I just didn't feel the need to spend another $ 500+ to get it rolling while my other rc's are collecting dust.

Did you run your gearing through the speed calculator? I fear a 45t spur will be too small and you may be geared for the moon. I'm going to use a 52t in my LST center diff truck.

Muggy shocks are no different from aftershock shocks save for different length shock shafts.

Extra weight of the al ones is not worth it, IMO. Unless you plan to bash the pee out of the truck...

Harold,
1518 1Y/1800kv Geared 45/11 tops out at 40.27mph unless I overlooked something ?

It's funny you mention the shocks Linc, I was thinking earlier today (after I ordered everything,DOH) that this build's theme is keeping it light weight. I'm reassesing my decision and I'm gravitateing towards Losi 8ight Shocks. I need some measurements befor I decide which. I'm gonna get the Muggy Towers on and go from there.

Another sound reason why I'm doing this, starting this build on a paid for foundation and the investment will be well within reason compared to starting from scratch. I only had to order the shocks,which I may not now use and tires,body and a few incidentals. Everything needed I had stashed in the "Treasure Drawer".

Muggy diffs
 

If you do need lower gearing, just swap in the Muggy diffs.

I have Muggy gearing in my other LST, helped bunches ! Thanks

If you get an lst1 axle shaft and use as a centre shaft, it will push the motor foward a tad more. I did this and went to the LHS to get a short one to fit the other end. As a reference, the lst1 axle shaft is the same length as the lst2 but doesn't have a large cv knuckle.

Some people just don't like to use that small of pinions, I also don't know your tire size.

When I mocked mine up the CD fit with one LST center shaft and one LST XXL center shaft. Easy Peasy. (the XXL shaft is .5" longer)

hope your using a pair of those zippies for 5s 6600mah!

Harold,
The small pinion size doesn't bother me, don't quit understand why is does to some guys as you mention ?
FYI, not sure of tire radius either, using the VTX Prolines with the 4" rims and super low profile tire. I guessed with the calc at 5" with .25 balloning so if they are shorter or taller I should be OK either way ?

The CD is going to be really forward so I'll have to cut and reweld center shafts me thinks. No problem w/that, have welder here at home and the only bitch is making them spin true. I've done it countless times prior, just need patience. I do have a bunch of left over CVD's and axles from many other prodjects so I might get lucky with one but I doubt I'll score both ?

Ross,
I have 4 of these packs and wanted to keep it light as possible so I'll be using one at a time. I should get decent run time, 10-12 minutes ???

I need one of those!:yipi:

that thing even though itll be light for an lst2 its still heavy and the 5s 3300 pack i think would be cutting it close.... i run a 5s 3300 pack in my 7 pound 808 buggy and i only get 12 minutes running on our outdoor track... i have a 5s 4200 for my truggies and i feel alot better about it than i would running a 3300 in a truggy, because i would be guess about 8-10 minute runtimes for me with 3300 and i only get 12-15 with my 4200.


and btw your tire height is way off, they are a solid 5.6 inches tall and they DO ballon a little bit so figure in .1 for ballon and your figures will be more accurate.

I would stick with muggy shocks, plastic body threaded, for your build. No reason to use a smaller shock. The best part about an lst based truck is the big ole shocks, they just smooth everything out. And nothing lst based will be light, but it will be planted and possible faster around a track.

Ross, Your correct they are 5.6 tall, This could pose a small prob ?

I would go with muggy diffs, and a 13t pinion. With the tire info set as Ross specified you get 41mph. Small pinions are not such a good idea, they wear fast and do not treat the spur very well. I run a 49t spur in my muggy, with a 14/15t pinion IIRC. With a 1600kv motor on 6s lipo it does well. I run std MT tires, badlands usually, on it. Keeps the weight down, and the rotational mass as well. Lighter wheels/tires are a must, especially if you plan to run the smaller capacity lipo. Also the muggy diffs will allow you gear down a bit if necessary, maybe a 12t or 11t. A larger spur would be the best bet, as it just gives more gearing flexibility.

I will be going with Muggy Ring and Pinion then, Thanks Bro.
FYI, these wheel and tires are very light weight http://www.prolineracing.com/product...TR-412-79.html

Update
 

I decided since I have so little money in this build I sprang for new chassis rails and uppers. These are a little war torn so if thing comes out working nice I'd like to to look the part as well ?

This is only mock up, Still need to counter sink holes in Lower chassis plate that I made today and do some more trimming to the upper CF plate to let the motor slide a little more over to the left. Once I decide exactly where the CD will go I will make the center axles and start bolting stuff down and start thinking about braces, not sure if I'll need them or where they'll go yet ?

Hopefully this Friday the SmartDiff and 45T plastic spur will show as well as the shock parts. Luckily I have a few sets of the Muggy diffs gears so I'll rebuild the diffs Weds with 3K Rear and 7K front. I've decide since it was to late to cancel the Muggy shocks I was go ahead and build them and install till I decide what 8ight shocks to use (I need overall measurements to compare to Muggy Shocks)

Also, need suggestions for a no frills Battery tray thats not going to take up a lot of room ? Thinking of using thin "L" angled aluminum in 1-1.5" for all 4 sides ?

Anyway, Here's a peak
http://i88.photobucket.com/albums/k1...S/P1120002.jpg

http://i88.photobucket.com/albums/k1...S/P1120003.jpg

http://i88.photobucket.com/albums/k1...S/P1120005.jpg

If your not phased about leaving one side open on the battery tray, you can use an ali angle 2" wide and bend up each end.

I've done this on my rc8t which doesn't leave the battery exposed, it might be different with the lst.

Not sure I follow you ?

Still morning here, when I get home tonight I'll take a pic for you. It's quite simple really.

It's the term "ALI" Angle that throws me off, I'm sure I know what your refering to.

I think some thin Aluminum "L" angled aluminum will be the ticket, It'll take up very little room and with a few velcro straps it should be all I needs.

looking good. I need to get outta this damn bed so I can work on my builds, y'all are showing me up!!!:yes:

Nice use of the diamond plate and all of the CF . You set up should be fairly light. Curious as to why the 8 shocks and not the muggy/LST..is it weight savings you are after or a performance advantage

Yeh sorry 'bout the lingo digger:lol:

This is what I have - 1"x2"x0.06" aluminium angle

http://www.rc-monster.com/forum/pict...&pictureid=460

I stuck it down with t-lock velcro and never had a problem. I made it so I could fit 12x A123's (6s2p)

http://www.rc-monster.com/forum/pict...&pictureid=464

Haha! This must be the world's first marriage of CF & diamond plate... you are a true Hitec Redneck:mdr:

Looks cool!

I use the rubberband trick on them pesky tire rods too...

IF and when I go to the 8ight shocks I will only be using 4, not 8.

And FYI, I did order a set of plastic shock bodys to compare weight and possibley reconsider running them instead. Under $8.00 for 4 NIP, might as well since they will not go bad sitting in the bag ?

I gotta be me ??

Thanks Bro.

Yup , we were on the same page just different lingo.
I've made several trays like this and they all have served me well, Thanks for the effort PP3310 ! OBTW, the RC8 looks great .

Thanks Harold, it's not to terribley hard to show you up. After all your short,blue and hairy all over ? :whistle:

I need to figure out how to quote several posts on one reply page like I see some guys do ? Dam computer ignorance.

I'll trade you a nice piece of AL plate (not diamond) for a couple of those extra muggy diffs you have....

See the little icon next to "quote"? It has the two sheets of paper one on top of the other? Click that and it lights up red. That is the multiquote button. Click it on every post you want to quote, and it will list them in the order you click the buttons.

Sweet, Thanks James

I gracefully decline, thanks anyway.

No prob, took me a while to figure it out myself. I ended up hovering over each icon to see what they all did.

Small revision, After getting the motor mount installed and working on getting the CD in I've noticed due to the motors diameter running anything less than a 12T pinion the center shafts are to close for my liking to the motor.
Sooo, Muggy diff ring and pinions are certainly in order.

You may also want to go to a larger spur gear...

Beleive me I do, But I have to have a plastic Spur and Losi only offers a 45T max. Open for other avenues ????

Using the calc with Muggy diff gearing,45/12 and the PL-tires speed will be 38mph.
When all assembled I will be able to get a 11T pinion in there with no issues and that will drop me down to 34mph if needed. I'd just rather have some extra room between the motor and axle.

Why plastic? My rrp 49t spur and rcm pinions like each other alot, very quiet and very durable. I used to stick with plastic, but for the heavier stuff metal is the way to go! I have the extra wide rrp spur.

I have a Lightning Stadium Pro2 that is one of my favorite bashers but metal on metal sounds horrible. Also tired of noobs asking "whats wrong w/your truck ?"
Wasn't aware of RRP made spur gears, DOH ! I will look into them if I'm not happy with final ratio. Thanks again.