mixmasterjay Posted November 22, 2013 Share Posted November 22, 2013 Hi guys , i have a turnigy trooper 4x4 brushless , ive put my vxl 3s esc in and ran the stock 2080kv motor with not one single issue , now ive just bought a 7.5t sensored orion vortex brushless motor and it runs 100% without the pinion on , as soon as its all bolted in and ready to go it seems as though there is a rev limiter like on a 1/1 scale and it all gets hot to the point the battery cables have melted , the pinion is 14t but im unsure what tooth the center diff is ? , would you say its an over gearing issue ? Thankyou for your help in advance jay ps its running on 2s Quote Link to comment Share on other sites More sharing options...
Tug Posted November 22, 2013 Share Posted November 22, 2013 Sounds like a "hot" motor, the Velinion is a 3500 kv, ~10 turn. So your Orion is possibly 4500-5000 kv? Perhaps drop a couple off of the pinion? 1 Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 22, 2013 Author Share Posted November 22, 2013 Cheers mate , i need to find out what type of pinion it is now lol , im sure is just a leccy converted nitro version so am i right in rhinking its mod 1 ? Quote Link to comment Share on other sites More sharing options...
Tug Posted November 22, 2013 Share Posted November 22, 2013 Probably, that's the standard pitch for most nitros. I'm surprised it got so hot on 2s! Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 22, 2013 Author Share Posted November 22, 2013 My mates does the exaxt same thing on 2s with a 120amp esx and a hpi 7.5 brushless motor too , so the only thing i can think of is the gearing , the heat has split the esc + 12guage outer casing on the cable too lol Quote Link to comment Share on other sites More sharing options...
Tug Posted November 22, 2013 Share Posted November 22, 2013 Standard 540 can or bigger? Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 22, 2013 Author Share Posted November 22, 2013 540 brushless , mine is a 7.5 orion vortex and his is a hpi flux 7.5 brushless motor , they are both perfect with the stock 2080kv brushless motor in but lack speed alot lol Quote Link to comment Share on other sites More sharing options...
Tug Posted November 22, 2013 Share Posted November 22, 2013 Could you not run 3s on stock leccy bits? Or try a "cooler" motor, ~8-9 turn? Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 22, 2013 Author Share Posted November 22, 2013 (edited) Yeah the stock esc can take 3s apparently but its only 35a :/ , ive not got another motor other than what i mentioned , or a 3s lipo Edited November 22, 2013 by mixmasterjay Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 22, 2013 Author Share Posted November 22, 2013 Quote Link to comment Share on other sites More sharing options...
Tug Posted November 22, 2013 Share Posted November 22, 2013 Smaller pinion and/or lower kv motor. 1 Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 22, 2013 Author Share Posted November 22, 2013 Ive got a pinion comming off a friend , i'll give that a go and.report nack and.maybe sell that motor lpl Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 Right 12t pinion does the same thing and motor gets hot aswell still so dunno what to do ? Quote Link to comment Share on other sites More sharing options...
barnetbasher Posted November 29, 2013 Share Posted November 29, 2013 is it me or does that motor look a bit weeny for a SCT ? Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 Its a 540 size can , prob my phones cam making it look small ? Quote Link to comment Share on other sites More sharing options...
tonysmini Posted November 29, 2013 Share Posted November 29, 2013 Maybe the trucks just too heavy for the motor. I have one of those motors in a TB01 which is heavy for a Rally car and it gets warm there. Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted November 29, 2013 Share Posted November 29, 2013 (edited) this system build requires something from this range of watt meters http://www.hobbyking.com/hobbyking/store/__471__157__Tools-Watt_Meter.html going from others setups to your own is risky, not every truck is the same not every motor is identical they can be either side of the numbers given. a meter will allow you to see how many amps a motor will pull at full power, it will also tell you the watt hours used and how many watts is being used. these meters we flying guys use all the time, they allow us to find the esc/motor/ prop match a bit like a land rc, but your wanting the esc / motor / gearing match. a meter will save you a lot of troubles in your rc lifetime, and will let you match power systems to you machines. Other reasons for battery wires melting. cold solder joints ( dry solder) can cause a higher resistance than in the wire this causes more amps to be drawn and the bad soldering heats up to a point they spark and start to cause heat build up, you see this as melted wires. now i would also be checking all deans / bannana plugs and also maybe just resoldering them with a hot iron use some solder wick to remove old solder and add new solder, DO NOT blow on solder to cool it quicker leave it alone that rapid cooling can cause dry joints. Edited November 29, 2013 by Tamiyacowboy Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 I will look into that thankyou mate , the truck aint that heavy tbh bud Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted November 29, 2013 Share Posted November 29, 2013 (edited) Aye MMJ just take it easy and slow, start with solder joints check them and if you think they need it give them a reheat with a hot iron ( solder iron) you really need to find out what the stock motors turn rate was, the 2080 kv is one number to gain rpm ( speed the motor goes at ) we need to know the amount of turns it has a brushless usually has two sets of numbers like this 2212 / 13 this means the motor is a 22x12mm can and a 13 turn. sometimes the motor will have a kv rate the motor above being a 13 turn means its around 980kv your saying a 2080kv and on 3s aka 11.1 so the maths is 2080kv x 11.1v = 23088 RPM. Edited November 29, 2013 by Tamiyacowboy Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 I only run 2s , yeah is a stock sealed blue can and all it says is 2080kv on a sticker lol no name.tags nothing else at all :/ Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 This is the rc http://www.hobbyking.com/hobbyking/store/__24971__Turnigy_Trooper_SCT_4x4_1_10_Brushless_Short_Course_Truck_ARR_.html Quote Link to comment Share on other sites More sharing options...
jea Posted November 29, 2013 Share Posted November 29, 2013 the 7.5t orion vortex is a 5500kv motor thats miles to fast for this car .. the only way your going to run this is to lower your gearing a lot Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 So what pinion would you suggest roughly ? Stock is 14t , not sure on the center diff/spur tooth count Quote Link to comment Share on other sites More sharing options...
jea Posted November 29, 2013 Share Posted November 29, 2013 the smallest you can get to fit .. Quote Link to comment Share on other sites More sharing options...
mixmasterjay Posted November 29, 2013 Author Share Posted November 29, 2013 The spur is 44t , just counted it , i think the smallest would.be about 10t maybe 9t at a push , so i need a mod1 10t 3mm shaft or lower tooth pinion :/ Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.