Hi Ed, either engine should work well with this plane as its very light for its size and has lots of wing area. I took mine out today and this time it was dead calm. The speed of the plane today was incredible. The new engine is speeding up with more run time and after the second flight I was chasing and catching up to a 1/4 scale extra that was flying at the field. Once I caught up I was matching speed and maneuvers with him. Made for a fun day!