Bf 109 and Mixture

[BadAim]

By Gassifier, I assume you mean Carburator. The problem with the early spits and many other planes was negative G's; at the top of a loop, if you are still moving you still have positive g's (usually), so this is not the problem, it's when you push the nose down that the cutout happens. None of the Spits modelled in the game had this problem, but several others do. Try the Hurricane I it has the same engine ad the early spits and the same carburetor problems.