Someone Needs to Make Direct Injection Upgrades

I have a great desire for a 2010 Chevrolet Camaro 2LT. The reason is that I want to twin turbocharge the sucker. However, what will hold me back for awhile is the lack of upgradeability in the direct injection fueling system. I really want to see what kind of power can be pushed out of that motor though (the 3.6L V6 VVT DI). I want to take down Nissan's VQ37! In the meantime I suppose I could try and poke at the engineers who work on that engine to see what kind of numbers they think could be pushed out by the stock direct injection system.