The air seemed a heck of a tad lower than 8' too, more like 6 feet. It sounded like your t-maxx was not winding out like it should. Try leaning your engine a hair and see how she goes.
Thanks El Pirata! I leaned it out and now have alot more speed and power. On asvalt or a smooth track, it runs at about 250-280. It always seems to run hot when jumping the hills and running on rough terrain or grass though. I am getting a good smoke trail through the full throttle range, but it still overheats if I'm not dumping a little raw fuel on the rough terrain.