Alright, now I,ve been looking into upgrading my fuel system and would like some suggestions. So I'm running the LT8 on my street ported S4 TII block and S5 manifolds and turbo(stock) with adjustable wastegate. I would like to upgrage my pressure regulator, injectors, and possibly a micro fueler. Now I have the walbro fuel pump and I would like to have a semi street drivable car. So my question is, What size injectors would be a good upgrade and what about just adding two extra injectors. Also what kind of pressure regulator would work best. My goal is the 350-400 hp range.

 

I guess I should also find out what turbo would work best for the setup?