The 91mm doesn't have any concrete compressor specs. It's a custom variant of the B/W Airwerks S510 that uses a 95mm compressor inducer. The 95mm does have a compressor map and specs. For the 95mm it's 165.That is good news on the headers, I will use 304 bends, but I have a new rod to try er-347, supposed to take more heat before corrosion. Another question what is the max lbs/min on that 91 mm turbo you have?
Forced Inductions did the turbo. They advertise that the turbo is capable of supporting 1650 hp. Without a compressor map for the modified compressor wheel it's hard to confirm that.