how much boost
 

i want to go single turbo but i dont have the money to do the fuel system right now could i go single with my stock system and not run high boost maybe some where around 10 psi. if so what size turbo could i use my mods are front mount intercooler dp,mp,cat back, intake ,fcd, 3mm seals, and a street port if you could help me out i would apperciate it thanks

myself and others have had good results with just a walbro pump and large secondary injectors.

I'm running 20psi w/ the walbro intank 255lph and bosch 160lb/hr secondaries. total cost is about $200

rest of fuel system is stock

I think you're going to get the same response from most everyone else but here's my version of it:

If you can't afford to do it right, don't do it at all.

Basically, the fuel system upgrade enables higher horsepower, but it also is a reliability modification too. IOW, you don't want to crank up the boost much if you don't have a fuel system to support it. I see this is your first post and you just joined in the last 3 days -- so don't take this the wrong way, but don't take it lightly: Spend a LOT more time reading this forum before you ask too many questions. Most of the questions that you're going to have right away will have already been answered many many times in this forum. Spend some time looking through the FAQS. Check out other member's websites -- here's a couple decent ones to start with:

http://fc3spro.com/
http://www.banzairacing.net/
http://www.robrobinette.com/

don't do the upgrade till you have all the parts! it will not get you anywhwere but a blown engine! buy a part as you have the money and as you get all the parts you need put it together then! don't do it and install it a piece at a time!
That is my advice.

T04E, 57Trim, .84 AR, P wheel, should put in in around 300rwhp at 10psi. Good spool up and flat torque curve.

You'll need to ditch the FCD and get a standalone ecu to run a single turbo. That's another $1600 for an ecu and basic tuning.

As above, if you can't afford to do something RIGHT, don't do it.