I'm using TZ also. Lotsa torque too. On a large track like the one I've posted earlier, gear to around 5.4/5.3......it has good top end on the straight and enuf torque in the infield too.
Another good 23T is the Yokomo ST. he he he...I always love the torque base motors.......else you could go for the RPM base Yokomo LR. Dave love this one.