medusa 36-60-2000 too hot?

[montyjcm]

I just got done testing my new 8ight conversion with an MMM and medusa 36-60-2000 on 4s (2, 2sSMC 6000mah 28c). My gearing is 15/48. I just messed around in my parking garage, nailing the throttle, just trying to test out the system. However, my temps were hitting 180 for the motor, 115 for the esc, and 80 for the batteries after about 10 minutes of running. Ambient temp was probably around 75 or so.

This seems too high for this motor, especially after doing some research and finding that the majority of people running this setup have no problems. Could I be over-geared? I hear that 13 or 14t pinions are usually the way to go, but I wouldn't expect that high of temps with a 15t. From what I can tell, there is nothing binding and everything else seems to be in working order. I am planning on racing and don't really want to lose much top end by drastically undergearing my buggy.

Would the RCM heatsink help out a lot, or is that just a bandaid fix? Could I have a bad motor?

Thanks for the help!