I am planning on running 4x720cc greddy injectors,a BNR stage 1 hybrid turbo,a walbro 255lph fuel pump,a custom FMIC,an safcII,and a wideband, my questions are will i be able to do this setup with an Rtek 1.8 if i was to run low boost(6-10psi)I only am planning on 250-260rwhp for now..i need to rebuild my turbo and motor now so i figure i may as well upgrade,i would get an Rtek 2.1, but it is still currently in beta development for the s5 Turbo II(ghaay)

 

Good question. I'm here at this point also

 

You'll probably be alright, but only a wideband will tell you for sure.