brushless 1/10th truggy (help and opinions?) - RC-Monster Forums

rootar · **brushless 1/10th truggy (help and opinions?) -** 10.12.2007, 02:28 PM

Well im just getting back into RC and i already have a minlst2 and a micro-t now im hooked agian and want to build a brushless truck. I sold my emaxx over a year ago and i dont really have the funds to go that route at the moment, i was considering a the new traxxas vxl trucks due to the great reviews and still am but im really wanting a 4wd just because of how much better they handle.

Ive come across a GREAT deal on a brand new Hotbodies lighting stadium10 RTR (ill just sell all the nitro components). I've heard of people running these on the lower kv mamba max setups but having temperature problems (i think because they cant gear them low enough, please correct me if im wrong), So with all the great reviews, low temps, and killer torqe of the vxl system i was thinking of using it on either a 2s2p 6000 or a 3s2p 6000, with the 3500kv motor i figure it should be able to pull the stadium10 pretty well. Fabricating the motor mount and battery tray for the conversion will not be a problem at all. I looking for 35-38mph out of the truck because you honestly dont need anymore than that, do you think the 2s will provide enough or will i have to run 3s. Ill mostly be bashing around, some pretty big jumps, and of course track time in the truggy class agianist the the nitros. Runtime is also pretty important im looking for atleast 20-25 minutes of track time so i can run in the 20 minute mains.

Any suggestions for the motor, controller, batteries, or gearing would be great, ive been out of the hobby for a couple years so ive been reading ALOT trying to get update on what all is avaible these days. BTW i have a DSM system to use on the truck already, keep in mind im on a tight budget of $600 so if you guys think there is a better brushless system that will do what i want it to in this truck it still has to fit in my pricerange and the vlx is only 170 thats another reason im wanting to use it.

Sorry for the long post and thanks ahead of time.

rootar · 10.12.2007, 02:40 PM

forgot to mention i did finish the brushless pede i started building over two years ago on here and i sold it also, if the vlx system wont be up to the task of powering the lightning stadium 10 then i might just buy a vxl rustler and be done, please let me know what yall think.

BrianG · 03:02 PM

The MM ESC and an S or L motor on 3s/4s would be killer. Even a regular S motor has more power than a MM motor despite the similar size because there are more coils inside the feigaos.

I say 4s because the higher voltage will allow you to use a lower kv motor, which pulls less current and you won't need really roibust batteries. A 4s1p 5Ah maxamps pack should be perfect for that and be light as well.

lincpimp · 10.12.2007, 03:09 PM

The LS10 is a great truck. I run mime with a mamba max esc and a feigao 10l motor on 4s lipo. With a 12 tooth pinion it does about 38mph and runs great. If you want to run 3s use a feigao 9l motor. The L can motors have more torque than the s can or velieon motor. The mamba motors are too small for 4wd.

rootar · 10.12.2007, 11:44 PM

i see the 9L motor in the store on this site, this will work with the mamba max esc correct? will the 3s1p 5ah maxamps give me the runtime i looking for?

lincpimp the ls10 does use mod1 pitch gears correct? what kinda runtime are you getting with your setup, and could you maybe give me a link to see your setup? thanks

lincpimp · 10.12.2007, 11:51 PM

Yeah the 9l works great with the mm, and those 5k 3s packs are a good match. I figure you might get 25-30mins mixed driving with that lipo. The ls10 has a mod 1 spur, 52 teeth and will never wear out, it is thick! Heres a few pics, this layout seems to be the popular one, only way i can think to do it!

rootar · 10.13.2007, 12:57 AM

Thanks for the pics. Thats the layout i plan on using i had the same idea for the motor plate but also making it L at the bottom and attach to the chassis.

i would REALLY like to use the the vxl system on 3s, BUT if its not gonna hold up i might have to find some extra money somehow and get the MM/9L combo which is $40 more, doesnt seem like much but i would have to buy a cheaper charger and i reallly want a nice charger that'll charge everything (including my minilst nimh packs)

what kv is the 9L and how would it compare to the 3500kv vxl system on the same battery (say a 3s2p 6000 for example)?

gotta keep it under $600 and a 100 of it is a nice charger...... im trying to figure everything out and reading reviews on everything, whats your take and hows that chassis holding up (shocks, arms, diffs...) i would think they are pretty tough.

2FastSS4U · 10.13.2007, 06:04 AM

Have you considered a CRT.5 they seem to be fairly cheap and pretty durable.

rootar · 10.13.2007, 10:45 AM

the crt.5 is more expensive to build no matter what brushless i use in the ls10, ive seen crt.5 run and i was VERY impressed but the little truck is a little to much for me right now atleast.

lincpimp · 10.13.2007, 11:47 AM

You should be able to do the mm/9l combo cheaper the the vxl system.

Get the mm from here: http://www.b-p-p.com/proddetail.php?...Max_Controller

and the 9l from here: http://www.offshoreelectrics.com/pro...?prod=fei-540L

Or you can bid on a 9l that I am selling, it is used but works fine: http://cgi.ebay.com/ws/eBayISAPI.dll...MESE:IT&ih=017

The 9l has a lot more torque than the vxl motor, kv is 2700 vs 3500, but you gear differently to compensate for the slower turning motor. The 6000 3s pack will be fine. You should get at leat 30mins runtime out of it. A good charger is a wise investment, pays off in the long run!

rootar · 10.13.2007, 03:45 PM

I WAS JUST looking on ebay for a 9L and saw it was from slidell louisiana not 5 minutes ago and i was getting on here to pm and see if that was yours lol. how much time does it have on it? and it would use the 5mm shaft mod 1 pinions correct?

thanks for the links to the mamba max thats $20 cheaper than where i was planing on purchasing and ive my deal withthe ls10 rtr for $185 shipped so here is what im looking at:

185-truck
117-mm controller
60 or less- 9L motor
12 (each)-mod1 pinions
105- charger

after i sell the nitro compents i figure ill have 210 dollars or so for a battery and a better servo, i might can snag a good 100oz servo for free from my friend that he hasnt used in 3 years.

so for the battery ive been looking at max amps site and noticed they had a 10AH 3s1p battery rated for 100 amp constant for only $190. This will easily be sufice enough to power the 9l wouldnt it, and that will give me seriously long run time for only $20 more than the 6AH 3s2p. am i missing anything

lincpimp · 10.13.2007, 08:51 PM

The 10amp hr batteries are big, and heavy. It would fit in a ls10 but it would make the truck side heavy. The 5k or 6k 3s packs would most likely be better. PM if you want the motor, I sell it for less than 50 bucks. It is in great shape maybe 2 hrs on it, probably less. You will need 5mm bore mod1 pinions. You can get them from mike at the rcm store, he is the fastest and most reliable. I run mine with the stock servo and itis fine for bashing. You may want to disable the mm bec and run a ubec or receiver pack. Just depends if the mm runs to hot for you. Not really necessary on 3s.

rootar · 10.14.2007, 12:51 AM

ok i guess ill go with the 3s2p 6000, i sent you a pm about the motor. im gonna have the truck and battery and esc on their way either monday or tuesday (waiting on my new debit card for my checking account) and then ill have everything but the charger so i can finish all the mounting on the chassis and ill have to sell the nitro stuff i removed before i can purchase my new charger.

You wouldnt happen to know if the 2.5 engine would be a bolt in replacement for a traxxas 2.5 engine would you? if so i have it sold already, im just wondering and i cant ever get ahold of anyone at hotbodies to answer my question.

could you give me a link to further info on the MM bec problem guess i could run a reciever pack if i had too just would like to know what the problem is. the bec does supply 6v doesnt it?

Im picky about my steering servos, always have been i guess, lol i have a 70oz/in hitec 225mg servo in my minilst2 if that tells you anything. i usally run an overkill servo, so if its 1/10th scale it needs atleast a 100oz/in mg servo in my book.

rootar · 10.14.2007, 12:57 AM

here is a link to the charger im planning on getting ( http://www.fmadirect.com/detail.htm?...044&section=38 ) i was referred to this charger by my instructor at college that flys model and control planes he said it works great for his helis and lipo powered planes, i contacted maxamps and they said it would be a good charger also.

lincpimp · 10.14.2007, 01:03 AM

The bec in the mm tends to heat up alot, and the mm has a minimal size heatsink and thermal abilities. BrianG did some testing and found that anything over 7.4v made the internal bec heatup quite a bit. A novak fan and some 1/8" spaces will help the mm stay cooler. I know some here do not like fans, I do not mind, but am not that hard of a basher! On 3s you should not have much problem with heat, but keep an eye on it during the first few runs. If you have an extra 50 artur(griffinru) can mod the mm and make it much better at managing its heat. I would give it a try first and see how it works for you. Since it is getting cooler you may not have issues.