Heres the short story. You want to turbo a civic si on a stock motor. ok well:

Use your Chipped P28 to run Uberdata. if you are in Arizona, contact IMPORT POWER HOUSE. I used to go there when i lived in Arizona.

Use the 450cc injectors. remember to wire in a resistor box.

With Uberdata and the injectors YOU DO NOT NEED AN FMU, or a fuel rail.

Run 10psi TUNED safely and should make around 200-230whp depending on the condition of your engine.

I would upgrade to a custom 3 in exhaust.