Thanks for the input guys. The airplanes came from a well known pylon racer here and I'm basically just using the same set up as he was. I spoke with Darrol Cady and he is sending me some of the green Merlin plugs (similar to the Nelson hd plugs). The last time I ran nelsons was when I lived in alberta and was at 3400'asl. Out here at sea level I find is a much different game. I'm pretty sure the biggest issue I have had is just not backing off the needle far enough for the amount they unload in the heavier air.
Thank you
Jeremy