At what point do I need to step up to a 58tb??

[QC97Z]

Yes sir I knew id be wearing thin on fuel with the nitrous but I got a smoking deal on the 30# injectors so figured they'd be better than running the stockers, I'm gunna pill down to 150shot when I dyno tune it and see what the duty cycle is and if its too high(which it will be)ill sell the 30# and get some 42#.I asked the OP though if he was gunna run any nitrous to tell him what you just stated.30# will be fine for his motor but will be at there limits on spray.always better to overkill it a little to be safe.

Absolutely good to be safe. I'm running 82# injectors, probably don't need to be any bigger than low 70's. It's just a really shitty idea to exceed 85% duty cycle.
BTW, I'm working on a cam-only build soon for a vintage street rod. Interested in possibly selling those 30# SVO's?