Little cooling help for MM Muggy?

[ilpufxit]

I've been running my BL Muggy for a while now. It works great, handling is awesome, flies really nice, rarely breaks. It's as fast as I would want it to be (about 40 MPH). My setup is; Feigao 8xl, 14t pinion, Spider Diff, Modded MambaMax, MaxAmps 6000 4s.

My problem is, I always thermal the ESC after about 10 minutes. The motor is pretty warm but not hot. When I stop and recharge, I'm usually putting 3500mah back into the pack.

What's the best way to get the whole pack through it at once? I'm not a big fan of fans but without losing speed, what are the options? My MM won't run on 5s or I would go that way. Any ideas?