ORIGINAL: closetguy
it would depend on the all up weight of the plane and if you can use the nose weight of the Evolution58.i have both engines the 55 can't come even close to the HP the 58 makes.
but if the plane comes in at 16lbs. the 55 would be my choice.
I'm still running the MT57 in my Extreme Flight Yak, 3rd season but I'm wanting more pull out power. We have an original MVVS 58 out at our field with an RE2 pipe and its crazy. I have to be pushing 18Lbs plus on the Yak.