I love the midrange punch of the novarossi's NRS12 RR series motors. JP offers versions of this motor (I've got a standard one... tuned right feels unbelievable) and the Mugen X12 is based on the same motor. For just about any track, this engine will shotgun you out of the corners very well.


I haven't tried the TZ, nor seen one- but I still have good faith in the OS name to think that it would be another great choice. Touring cars love that extra punch out of the corners because just about any motor can spin fast enough to keep up on the top end (given that the tuner has the skills), and the TZ sounds like it might have that great low-end kick I love in my JP.