I just wanted to share the Dyno that I got done this past weekend at Z1 Motorsports with the other Nismo drivers out there. The top cars in both N/A and FI categories (only ~20 cars though) were both 370z Nismos!
My Nismo has Berk CBE and Berk HFCs installed, but you should have similar gains with other CBE/HFC combos such as Stillen or F.I.
I did not have a baseline done, unfortunately.