[rootar]

i dont think its too high, the other day at the track in my 8xb my 1515 2.5d on 5s was running 158-165 at the end of 30 mintues, while my mamba max was only 120, yea thats right only 120 i was quite surprised i guess i need to gear up, i was only geared for 38 mph which gave me great control on the inside of the track, maybe 42-43 mph would even out my temps.

but in your case dropping a tooth or two like you planned should make a noticable difference in your temps.