I also run a TE-44 and before alky I would run 16psi, after installing Razor's Alky Control I set the boost at 25-26 psi. Now it drives like a different car, I see that you already have alky in your signature. Like Scott said and this is assuming that you have no issues, I would turn the boost up....
As far as your question, I have no idea where the sweet spot is, but when I crank the boost up while at WOT from 16 to 25psi, you can feel the car pull stronger the whole way up the boost range.
Chuck