Civic EG

Hi guys i am considouring installing nitrous on my hatch
i have a b16a2 with b16b pistons,itr valve springs and retrainers,ported head ,supertech valves ,gsr cams with some cam gears , 4-1 exhaust
i was wondering what is the maximum i can spray safe 50 shots, 75 ?
thanks in advance

I just read that a 50 shot is shit but a 75 shot isn't a ton better but you can feel it. I'm not sure if your pistons will make a difference on what shot you should run because of your CR. Anybody have an answer to that?