Scott has the math right, but I always like to be conservative and I figure a .65 BSFC for boosted applications. I had to buy injectors twice (underestimated the HP, lol) and lost $250 on the ordeal of selling them and buying new ones, so that's my reasoning for being a bit more conservative on the calculations.
I'd say 75 or 83 lb/hr injectors would be the way to go.
Troy