Do I need more injector 28.8's @ 470 rwhp
 

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mods 125 dry shot
mac headers no cats
224/224
most bolt ons
walbro intank 340

I would imagine so...when i dyno'ed my car the performance shop told me that i was maxing out my fuel system. They said after 5500 RPM's the car would lean out really bad. So i am in the middle of piecing together a fuel system.

ya dude, if you want more you really need a fuel system. Start with injectors. Maybe something in the 30's range maybe even 42's if you want more and maybe a pump... depends on how much more you want out of the car.