just my 2 cents on this....I have both those engines and found the the Max RR3 was a better choice. Running a small tight track, putting the power down from 3sct and the 353 was harder with the power curve they have. The RR3 seems to have a smoother power curve, and with running a lower gear on the NT1, 15/59-20/54 and a 2602 pipe,made it almost impossible to catch.

***ran on a parking lot track at Supperior Hobbies***
track size is "about" 60ftx120ft (20x40 meters)
car setup is posted at http://forum.teamxray.com/xform/inde...1162&setup=nt1