cant bring neu temps down.....

[rootar]

well today is the first time ive had any sort of problem with temps (down here in dallas texas), after about 15 mintues of practice my neu 1515 2.5d was at 170, mod1 mm only 121, i was only geared for 38 so i geared up 2 teeth to 45 mph and my motor temps after my next pack didnt change at all still at 170 after 18 mins, mm went up to 134, lipos never broke 105. so whats the deal guys, got any ideas? i have to drag in the driveline. gearmesh is good and no bad connections? should i gear up even more? i barely hitting top speed for a split second ont he straght and thats all.