An even-wind (4.0, 5.0, 6.0, 7.0, etc) X20 with the standard rotor is probably the best option if you are looking for a mod motor with a lot of torque. A lot of LRP team drivers use the 12 mm rotor just because the stock rotor is so torque-y and difficult to drive. I don't know of any other mod motor that has as much low-end rip and torque.
Half-wind (4.5, 5.5, 6.6, etc) will be a lot smoother.
Chris Hillier | 5280 Raceway | www.5280raceway.com | Racing. Elevated.
Destiny | LRP America | Protoform | Xenon/JFT | Gravity RC | Motiv | Sanwa | Max.FX