NOS 100 Shot and 24# inj. Help!!!

[tb]

I should not worry about going lean???

I still don't understand why the Fuel Analizer said to run 80psi pressure on my 24# injectors. My regulator is set at 40psi. Anything higher and it runs super rich. The only thing that makes sense is that my NOS in line fuel pump puts out about 80psi of pressure, but I think with the regulator set at 40psi I would be running lean. Here is what I typed into the Fuel Analizer program:

horsepower level: 390
Injector size : #24
Induction: : Nitrous

Then it spits out, I need to run 77-79psi on my current injector size. In the safe zone! If I increase my regulator to 77psi, my car will run like crap Naturally Aspirated. I hope someone can clue me in. Thanks.