I surely wasnt going to do any damage to the plane with the .91 running a 14x8! I had done my "homework" before buying the .91 and knew that a 14x6 is what seems most people run on their Magnum and ASP .91 2strokes. Its just the 8 was all I had.

I flew it 4 or 5 times and it just didnt impress me at all. Maybe a couple MPH faster than the .61 (12x6 prop)...so I knew right away that I was overpropped on the deal.

I really like the value of the ASP engines. This is my first "white box" one though. I couldnt pass it up as hobbypartz has/had them for 78 bucks and free shipping on anything over 50. Where else can you get a brand new .91 for that kind of money?

Plus...I own a couple of the ASP A2's in a 52 and 61 (61 came off the stick) and they have been great engines thus far. I have the 52 on my 40 ugly stik and it rips up the sky pretty good too! I just think the design of the US seems a bit more "sluggish" than that of the Ultra. At least it "feels" that way to me. Maybe I have too much expo on the Ugly though. I'll have to toy around with these planes a bit more before I make my final thoughts.

One thing I do for ALL of my ASPengines is put a small piece of fuel tubing on the high speed needle to seal it.It actually serves 2 purposes, 1. Seals the high speed needle from the dreaded "leaky" o-ring" and 2. Helps keep the needle from vibrating out of position in flight. Ive never ran any of them without this mod to see if it really needed it.Just had read so many posters on the net having to do this...soIve done it from the start. Like I said...my ASPs runny pretty sweet and they are an incredible value. I can buy 3 or 4 of them compared to 1 OS. Not knocking OS, but I just was posting in the heli forum to a guy about me liking to be budget minded on most things in this hobby so I can have a lot more "toys" to play with.</p>