Originally Posted by
BestNThDez
Well, I geared way taller, I think it was like a 22/84'ish, and the truck ran waaay too hot. Plus they changed the track up, it was hard to compare apples to apples. I ended up going back to a 18/87 and the temps were back under control. The track is more technical now, so the gearing worked well, along with a pretty tight slipper. I just got my new Tekin ESC and 9.5 motor, but haven't had a chance to put it in yet. I still was running faster lap times with my RTR and it's LRP SXX Competition ESC and 17.5 Speed Passion brushless. I'll post more later.
First let me say the track change at 702 to more technical is because they
know I'm going to be back in a couple of weeks LOL" (Havasu Chuck)
As for your RTR 3300 KV motor I think I have your answer. I looked in your
profile & read some of your other posts on other threads to see what you
were doing.
I see you posted that you had your RTR motor over 225F several times.
Heres something alot of people don't realize about brushless motors. Once
you over heat them they appear not to be hurt (but they are) they don't
burn up as easy as brushed motors but they do (loose tourqe)
Once you over heat a brushless motor you start a circle of where your
motor is running hot once. The armature then lost some of it's magnet
strenth (which is tourqe).. Then you get it hot again and it looses more
magnet strenth (more tourqe gone) Then you start another problem" you
now have a weak magnet on the arm so now when you run it, it gets hot
easier and will not pull as much gear as it could new without over heating.
The circle is now off and running wild. So now you are running hotter &
you gear down to cool it. You gear down it runs cooler for a while,then
you gear it up to try to get tourqe back because it won't jump now you
over heat it again & loose more magnet strenth. Then you gear it back
down to cool it off and the tourqe is gone a little more from heat damage
and even with the lower gear your a little hotter then you were the last
time you ran that lower gear.
You go around & around chasing tourqe over heating the magnet &
loosing magnet strenth which is your tourqe. When the magnet gets
weak it now creates more heat. More heat less magnet,less magnet
more heat round & round you go till the motor is total junk...
Most motors like Tekin,Novak & LRP you can put a new rotor back in
with full new magnet strenth and your motor will have all it's tourqe
back. Now you can gear it to it's best performance and it will run cool
again with lots of tourqe.
I've never played with the 3300 RTR motor so I have no idea if you can
replace the rotor. But if AE has a part number for the rotor you can
replace it. Give AE a call & ask if you can replace the rotor, if you can
you will be flying cool and fast once again. If theres no rotors avalible
you need to replace the motor..
Good luck and I hope to meet you at 702 in a couple of weeks"