To be honest that is the one parameter that I overlooked prior to tuning, I was not expecting the car to put out that kind of power so the 740's were not a concern of mine prior to tuning.
I do not know the duty cycle offhand. I will definately be changing the rails and injectors this winter.
Greg may be able to chime in regarding the tuning but I may have my base fuel pressure higher so I will have to see exactly where it is at. Possibly the 740's may actually flow more than advertised as well.