I am going to turbo my 94 hatch running a stock z6. I have been looking at different turbos (I am going to put together my own kit) and I cant decide which one. I'm thinking either a 14b or a t28, I have heard good things about both on a z6 with low boost (5 - 12 psi). Any input?

figure out your goals, look at the compressor maps and pick the one that's best for what you want.

14b's are a dime a dozen and are reliable and probably most popular