I wanted to know if I would have to change from a returnless fuel setup if I eventually wanted to raise the boost. After I build up the internals, I plan to turn the boost up to 15 psi. Can a returnless fuel set up be good for only low boost or would I have to convert it. I'm using an aeromotive billet digital fmu. I heard I can still use this as long as I get bigger injectors.

 

If you "turn up the boost" use shouldn't use an FMU, so the point will be moot.

 

it really depends how much power you are trying to make. If you boost a little turbo to 15+ psi it wont be as dangerous as a 60-1 at that much boost.

What kit and what size turbo do you run?

i would actually say its worth considering that FMU system with some sort of a piggyback and you might be ok, the digital FMU is pretty interesting.

 

Its a custom setup using an sc34. What do I need to do then, to run more boost?

 

you need to get a wideband on the car. I also definatley recommend running a j&s knock setup because your car has no control over timing