Very familiar problem. I had this same issue with my wifes Evo 2. Gets up around 240 and just dog craps out. Switch to the 9 mm venturi and you'll find that it will richen up a bit (quite a bit actually). Also, what plug are you using? Get the Picco P6 plug (not the OS P6) It's a medium plug and will last forever. My wife has countless hours of practice plus 4 full races (2 heats and the main per race) with the same plug.
