with my mixed setup the best ive ran is 15.6 after slowing at the end to try not beat my time..lol and being up here in CO with the shitty altitude/thin air that doesnt help, but all times before that i ran 17.0 then 16.2 than 16.5 then hit the 15.6. and i'm running really rich on stock internals.. have to do more adj to see what its really capable of hitting. whats your fuel settings like?