Well, that is yet to be actually determined just yet. The only prop I had was a 14x8 which was just too much as I couldnt really tell that much of a difference. I since have put a 14x6 on it and think that will be the "sweet spot" and get me what I want out of the .91.

A fellow club member has the same plane with an EVO 100 on it and it RIPS! Mine with the 14x8 on it was at least 10MPH slower by the naked eye. I didnt get to try the 14x6 because soon as I put it on...the skies opened up and rained me out. Havent been able to fly since and that was 2 weeks ago. Hopefully this Sunday I will see what dropping pitch does for it.

If that doesnt fit my fancy...I'll drop the prop size down to 13 and try a couple props in that range. Plus, I dont think this engine will show its true colors till it gets a gallon ran through it. Its a white box ASP.