Originally Posted by
OttoKrosse
Picked up a Hacker 21.5 and was told that I needed to turn the timing all the way up and then 1 more 'tick' to get top performance from the motor. Well, the little extra 'tick' gave me all the speed I was sorely lacking but now my motor temp was at 185 F when I checked it about 20-30 seconds after the end of the heat race.
Track temps were around 110-120f, air temps were about 105f, so the motors were starting out already warm. I do run a fan on the motor as well
1: What temp would be considered too hot?
2. Running a 5.5 fdr for our class, and I'm running a 113t spur and a 40t pinion (5.65 fdr). Would dropping down a tooth on the pinion be advised to reduce the temps, or are the 185 degree temps within a safe parameter?
Thanks in advance for your input.
Did anyone help you? That would be on the high side of what I would let my motors go (with a fan). Experts don't agree on the max temp for motors. Some say in the 160 -170 range others in the 170 to 180 range. but probably all would agree that 185 is pushing it. Motor timing gives you more RPM & AMP Draw and more AMP draw gives you heat. Is there any way to check the amp draw at the timing you have set in the motor (or just check the ESC temp and or check to see how much battery you consume during and calculate the amp draw)? If ESC wasn't hot too, do you have to run that FDR for your class? These brushless motors don't like to over rev, so if the ESC wasn't hot, I'd add gear and check the temps FREQUENTLY. If the motor temps don't drop, take the motor apart and see if there is anything inside that is binding (grit, bad bearing, etc.). Lowest FDR I've heard of in USGT is 4.25 with the high revving R1 motor on a small track, everything else seems to be in the 3.0 to 4.0 range. 5.5 FDR is really low. At least that's my experience. Hope that helps