Steve,
Thanks for the info on the Ivoprop. I checked out the site. I am a little skeptical now. I don't particularly like the idea of tape on the leading edge. It's a little cheap in my mind. I had to do it on a Hegy prop once to keep from abrading the leading edge but then of course,it was wood.(used electrical tape) I much prefer the inlaid nickle on my Warp or the brass on the Kiev. The Ivo is not a particullarly good looking prop but the pitch adjustment looks nice! I have never seen one (again East/West US thing)
I think it is difficult to tell hype from real numbers.It's kind of whatever you own is the best. I had heard the same improvement in performance from the Kiev prop and I sure like it. It is certainly the best looking. I really don't doubt the performance improvement is there but ,not on my aircraft. That smooth cowl has got to make a difference OR...OR.. I had the wrong size prop.
I looked at the Whirlwind ,know nothing about it other than it is 3 lbs heavier then my Warp. I did see it on Johns aircraft at Lakeland last year. It too is a nice looking prop.
I guess I am obsessing over this issue but,like all of us, I have an intense interest in my plane and want the best !
Dick