Screw what anyone tells you about fuel pressure. Nothing electronic will ever affect your fuel pressure for any reason. It's driven from a fuel pump running on a fused circuit straight from your battery. The fuel pressure regulator has no electrical connections. It's vacuum actuated. If you want turbo fuel management, start with a real fuel pressure reguator that you can tune (like Aeromotive).

The stock unit is a POS on a turbo setup. For $200, you can buy all the lines and fittings to run -6AN hoses all the way to the tank for the send and return lines. For $100 you can get a Walbro fuel pump. For $140 you can get an AEM fuel rail (optional). Slap your choice of injectors in there ($260), and get something (ie... Hondata) that has the ability to make adjustments for different sized injectors.

If you want to do the AFC hack, get a wideband o2 setup + EGT and you'll make much better use of your turbo. You're going to have to spend $ one way or the other. Wideband setups aren't cheap and neither is a real fuel system.

No tone in this... I'm bent for other reasons tonight.