Next week I'm +T'ing my 850 and looking at 5 to 8psi. Im using the injectors out of a 850 turbo that flow 310cc or 315cc at 3bar and I'll be using the turbo ecu as well. My question is that the FPR for both the NA 850 and turbo 850 for that year have the same part number,would I still need to get a RRFPR?

 

you dont need a rrfpr if the stock one is the same. a rrfpr is really no longer needed anymore due to custom ecm tuning. those were used in the 90's when the technology wasnt quite there yet.