new to the brushless scene, need advice

[ridinbikes247]

i love it so far...here is my set up
hot bodies 1/8 truggy with a 15 tooth pinion and 50 tooth center spur
3600 Nimh 6 cell packs running in series so 14.4 volts
feigao 8XL motor with the mamba max ESC
i dont have a fan on motor or esc
in 5 minutes the highest temp was 85 Ferienhieght on the ESC and around 70 for the motor and battery
i think i may get about 10 minutes hopfully..i am thinking either later getting a 3s or 4s lipo pack or 2 5000 mah NiMH packs...but im hoping it dosnt get much hotter..because 85 is really good i soppuse and if thats after 5 minute i would figure it was prolly peaked out in getting hott