JoshCorti11

iTrader: (4)

Hi guys,

my little brother recently purchased a used rc8b3.2e and bought a brand new reedy 1900kv motor with the reedy 850r esc. He’s using a 4s lipo. We drove it for the first time today geared with a 15t pinion and a 46t spur. The car had a lot of drag break on it and within a minute of driving it, the engine was to hot to touch. It did not seem abnormally fast on the top end, so we are not sure if gearing the car down to keep the engine cool is the correct solution. Do you have any suggestions on why this engine became so hot so fast?

TIA

MX304

iTrader: (20)

That gearing should be fine. I run a 16t on mine and even after a 10 minute main the temps are well within normal ranges. Drag brake can increase motor temps and really isn't used much in 1/8 scale racing, but I think you still have issues somewhere else. Make sure you do not have any extra timing added in the esc. and check for any drive line binding, bad bearings etc.

00pooterSS

iTrader: (6)

Is it drag brake, or something binding up causing drag.

Move the motor back or pull the pinion and roll the car, does it roll freely?

Reduce or turn off the drag brake and try again and see what happens. It may be that it's just too much drag brake causing the heat