In the smaller sizes....the 40's and 45's you run into the
high performance motor like the Rossi, MVVS, Jett motors
and such....then into the pylon racing engines like the Jett,
and the Nelsons.
don't forget the YS .45 thats right up there with the jett power wise and probablt less expensive. it's also a very friendly engine that a beginner would have no prob setting up.
dave