i got a b18b ls, i recently had a nitrous back fire and my filter caught on fire, so i figured i should buy a walbro pump and a fuel pressure regulator and gauge, and i was wondering what i should turn the fuel pressure up to for a 80 shot.

 

I have some nitrous experience...usually nitrous backfires only occur due to operator error I thought. It shouldnt matter what your fuel pressure is I dont think. what were you doing when that happened? spraying at too low of an rpm? or spraying while the engine is off then starting it up? lol