Hi many things will help with your problem, I use a 90 degree angled piece of plastic molded tube made by Formost for our use, or I just bend a small piece of aluminum tubing into a sharp 90 degree bend and connect it to the end of the open uniflow vent tube, it can point up or down, this will stop the wind from making the tank charged more and less with air pressure... and making the engine go lean and rich. note.. I used this for decades on many types of engines, it works on all of them, and they all do this. note I also used this in the very high wind NATs, it works very well. There are many dozens, maybe 100s of flyers who use this trick, I have tried a restrictive opening. I personally do not like that and it does not work for me nearly as well. Try them all and see for your self.
Randy