Littl3TuffGuy13

282 degrees F. Sidewinder 5700kv in Slash, Proline Sandpaws, 14/90 gearing. 7-cell battery. Why, why would this happen.

IloveMYxt2

Thats hot for 7 cells. How is your gear mesh?Could be too tight or something binding in the drive train. Or if its 95+ degrees outside.

Check out my install of a heat sink and fan on my Slash with the 5700 motor

http://www.rcuniverse.com/forum/m_87...tm.htm#8807142

04DarkShadowGT

That is ridiculously hot, are you sure that is correct?  Something doesnt fit, the gearing should be fine, the mambas run a little hot but not like that, and its only 7 cells.

Orion1024

That's way too hot, especially for a 7 cell pack.  How long did you run it for until it got that hot?  I've seen motors hit 240 on a 3S pack with no damage, but you might have crossed that undisclosed 'magic' threshold and damaged the magnets.

Redvanmafia

they say dont go over 200F, your pushing 300F, your motors gonna explode lol make sure nothing is binding in the drive train, in the drive shafts and in the diff, everything should spin like butter, if it doesnt theres a problem. how hot is the esc?, the way i look at it is if the motors really really hot you have it overgeared if the esc is really hot but the motor is just so/so then its undergeared, i try to look for a 50/50 heat ratio or close to it, but it doesnt always happen, check the gear mesh use paper to set it up, make sure the paper is tight in the gears but doesnt rip when you try to pull it out. it could be that huge body thats not letting any air get around the electronics try 13/90. thats all i no of, try a heatsink as well, if none of that works it could be a faulty motor, my 4600 on 3s geared 16/86 gets 200f after a good 20 minutes of hard running with big tires (5.4 inch) i dontunderstand why it's running so hot

Orion1024

So does mine...they're gonna run hot on 3S. It's not your gearing. You'll also find that if you keep running it, it's not gonna stop at 200 either. But since I put a fan on my motor it tops out in the low 180's no matter how long I run for.

Redvanmafia

i no im overgeared a little bit, im talking about him being overgeared i dont no why his 5700 on 7 cells is running almost 300

Littl3TuffGuy13

That might have been an error reading but i was holding the temp gauge for a bit and it was around 250 after. But still that is hot. The mesh is loose if anything. I have been running in sand lately so there might be some sand in the tranny or a lot of drag with the paddles.

SacramentoJoe

Maybe you got something other than the pinion binding?

Littl3TuffGuy13

If I push it, it coasts pretty freely.

Redvanmafia

sand possibly in the motor?, spin the motor shaft it should be perfectly smooth even the slightest ammount of drag could be your problem

Littl3TuffGuy13

Can you clean brushless motors? Like you would a brushed motor with motor spray?

monsterbombs

you can. i pull my motors down every once and a while

to clean them. air pressure is usually handy as sand gets caught

in all the wires around the can. i even smoothen the alum part of the

rotor if its not smooth. pull the end off that the wires go in, and be careful,

try to get out as much dirt as possilbe because you can actually make

the motor worse/push the dirt in.