fuel pressure for nitrous...
Steve Smith Blue printed my NOS system.
And according to him pick your fuel Pressure and then your n2o pressure.
I had to send him my fuel pump.regulators and the complete nos system including the intake and he will drill out the jets for your hp settings.
I had him do my Zex plate and the direct port system.
A lot of misconception that you have to run 1100 lbs of n20 pressure.
Whats real important is to have the same n2o pressure down the hole strip.
I ran 2-20 lb bottles when I use to run both kits.
This is just my ramblings.
Just remember stability with fuel and n20 pressure is always your friend.