I am building a 383 with AI heads (210cc),custom cam, ported intake and all the other normal needed (duel in-tank pumps,wired to cut the second pump on when the dry shot is armed) parts. i am going to spray a 125 dry shot, cause i already have that kit, along with a 175 wet shot. looking at (only guessing) making over 500fwhp na then the 125 dry shot for 625 fwhp. now that would be 48lbers at 43.5psi@80%. would you leave more room with a larger size or just stay with that? the wet kit will be connected in though the sharder valve of course.

now on to the title of the post.
would it be helpfull/better to go to a versa fueler with a set of low impendance injectors? thanks for any guidance you guys can offer.

 

If I had to guess, I'd say you calculated that injector size using a BSFC of 0.50 #/HR/HP. That's not correct with dry nitrous. Your BSFC will end up above 0.50 when you spray. A more conservative approach would be to use 0.55