Nitrous fuel pressue info needed

It depends on your fuel system.
I'm running 1/2 inch line to the regulator.
And a Mallory 220 gph electric pump.
That's enough to run the engine and 200 hp of Nos.

I've run a Carter strip Mechanical pump on a 440 and a plate system @ 150 hp with no problem.

The problem with mechanical pumps are that they pulse so you run the fuel on the rich side.

Trainer car with the mechanical pump.