I got my brand spanking new Tekin RX8 & T8 Truggy 1700kv Motor on my STOCK geared Summit (pinion:14, spur:69) with 2 x 2S 5300 mah Lipos.
Well 2-3 minutes into the first run it stoped, the motor and ESC overheated. I didn't notice smoke or anything coming out of them but smelled like fried motor and ESC...
I sent the motor and ESC to Tekin and then emailed them explained the situation. They replied saying the following:
<you have the motor far too undergeared to run on 4S. The Summit, while Traxxasclaims it is a 1/10 is simply not the case, it weighs more than my 1/8 truggy. The first problem here is that the truck puts a decent load on a motor and controller due to the drivetrain. I have helped people setup Summits before and you are undergeared for the 4S voltage so you can do one of two things; gear up or run 6S. Undergearing a brushless motor will cause excess heat as you are running the motor at a higher RPM than necessary to get the torque output desired. This is not a brushed motor, they react differentlyto gearing and voltage.>
1-Ok, so is he telling me my setting (Truggy 1700kv motor/pinion:14, spur:69/2 x 2S 5300 mah Lipos) is so out of acceptable range and it fried my motor and ESC in a matter of 2-3 minutes???
I didn't even bash, I ran it on a flat concrete drive way 2-3 minutes!
2-The lipo chart on Tekin website indicates you are supposed to use 4S or 5S. I used 4s thinking less stress on the motor and less heat. But the email from Tekin is telling me to use 6S. Why? That's too much voltage according to their lipo chart! How would I know I was supposed to use 6S???
3-I used the stock pinion to achieve more torque rather than top speed for the weight of Summit. I have a hard time believing using stock gear and driving for 2-3 minutes can overheat to the point it can burn my finger. It's not like I used 8S lipo and drove for an hour straight.
I told them I think I got defective motor and ESC but Tekin does not think so...
What do you guys think?