Originally Posted by
Tampagoalie
Gearing advice, please. I'm running a Hobbywing 1800 kv motor with the new HW XR8 ESC on 4S power. Punch is set at 5, timing at 1 (no advance timing). No turbo set. With an 18 tooth pinion it drives fast and responsive, but really hot, like 210 degrees when it comes off the track. 17 tooth is still pretty warm - 180ish but looks and feels slow so I don't want to go to a 16.
Bad motor maybe? How is everyone here gearing their trucks? Thanks for any help.
I know people have run the HobbyWing motors successfully in a lot of things (especially in short course), but the few people I knew in person that ran them in 8th scale back in Cali always complained they ran a lot hotter than others. That being said, folks like Ryan Lutz run 16 or 17 on 2000kv truggy motors, so your 16/17 should be about right, assuming you're on the truggy length HW motor. You should be able to turn punch down to 4 or 3 and get a little cooler, which may not even be noticed in performance based on how much torque truggy motors put out. Less wheel spin is cooler.
As with all heat issues, check for binding in the drive train too. The easiest way to do this is to just take off the pinion and roll the vehicle. If it rolls freely, at least the most common cases are good. Also check for things like notched outdrives or worn CVDs which may only bind up on suspension compression or full lock steering.