I have a B44.1 with a Castle 3800 KV motor, Castle sV2 speed control, 5500 mAh 50c saddle pack and 18 tooth pinion.....after 5-6 laps, the motor is less then 120 degrees, but the speed control is 175+?! Any ideas why? I have repositioned the controller as well as cutting holes in the body to improve air flow, all to no avail. I know this is a low budget s/c for this car, but I just bash, no racing and it runs fine with my track mates.....thanks in advance for any and all help.....

These systems are sensitive to gearing. If you can get a 16t pinion on there, or go up from say 81t to a 84t (add a few more teeth to the spur) you will notice a change in temps. Also some mfg's are now staying not to run the esc's for the full charge of the battery because they will get hot, run them 5-6 min then stop. I say just get the gearing right and run as long as you do not overheat it.

I'm headed out the ddoor right now headed to the track....I'll try it....THANKS!

That is undergeared, not over. I would rather try a 24 or 25t pinion to see the temps. Also those ESCs really need a good cooling fan, and using an external BEC also helps a lot.