Thanks = very much for taking the time to answer my questions! I'm curious as to why = you suggest the Renesis engine? What things are improved w/ this new = engine? I'm wondering though, if cost wouldn't out-way the incentive because you = would have to buy a new engine from Mazda? Compared to the price of a 20B engine? I tried looking up info on this new engine on Google and = didn't really get anywhere and I wondering if you have other sources? Do = you know even ruffly the improvements a person could expect over the 20B?weights?Power? If you had to do this all over again, what = changes would you make? Would you still go w/ the 20B, Renesis? or something = else? If you don't mind me asking [ just tell you you'd rather not say] How = much do you have into your 20B install? How is the price of the Catto prop = compared to say and IVO Magnum? Is your 20B install a normal breather = or a turbo'd version?

Thanks very much for all = your help! I'm working on my own design and I can literally = build the airframe to suite the engine or the other way around, but before I = do I need to get all the facts I can!

Jarrett;

The 2-rotor Renesis will put out = close to 90% of the hp of the 3-rotor 20B. It is considerably lighter = and probably has a bit lower BSFC. The lighter rotors running at = higher speed may even be smoother than the 20B. Tracy already has the redrive for it.

I paid Atkins $6500 for the = rebuilt 20B block plus alternator and water pump. From what I understand, that = is about the same price as a new renesis. With all the custom parts, = pieces, cooler, 2 radiators, inconel tangential muffler, intake manifold, TB, injectors, redrive, controller, fittings etc., etc., etc.; I have close = to $22,000 into this installation. It is normally aspirated; plenty = of power for a plane that is designed for 200hp Lycoming.

I don’t regret anything = about doing this engine installation, or building the plane. I = haven’t flown it yet, but I expect it to excellent. If I had it all to do = over again, I’d give serious consideration to buying an airplane and = going flying. But then you’re going on step further. I = started with a kit.

The Catto prop is $1650. = Don’t know the current price for the Ivo Magnum, but I guess it’s a = couple hundred more. I not impressed with the IVO from a reliability standpoint, = and I think the pitch distribution limits top end performance if you expect to = go over about 210-220 kts.

Just one guy’s point of = view. . .