well i went to the track today with my revo, just put the 1515 1y in there, and it does real well, a little more torque than the 7xl on 4s, i couldnt imagine this thing on 5s! but ran really cool for about my whole packs (8000's) esc w/fan 85 motor at its hottest point 115, its undergeared as it is, 24/58 i got a 26 coming, but most importantly i got throgh the whole pack without beaking anything! it was great, but whoever said neus drag the nose down was correct, i didbt think of it till i left, poor rear body tower...