irgo so what ure saying is that orion motors are good and speed passions can get there by modding them sounds pretty good.
Nah but the SP ESC do look verry good the price is abit out of this world but u do pay for what you get i guess

and vr6cj look up the Novak GTB instructions id imagine they would be the same to the speed passion they give pretty clear instructions on using brushed motors on them. good luck with it. Also 13.5 compared to the 17t in the SC10 speed difference is alot but you do get alot more control out of it with the 17t. My SC10 has a 10.5 in it i beleive. its pretty hard to control i would hate so see with with a faster motor. ive got the slipper to the best setting after some ajustments and some good tires on the back help but thats for my track its pretty spread out mite be different for yours.
Anyway again Good luck

Catchyas