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I ran 42 lb / hr injectors on my old ls2 403 setup and it made 500 rwhp. I would venture to guess that 42-50 lb/hr injectors would be right about where you need to be for an NA application.
__________________ PROJECT"UNLEASHED" LSx> * RIP DAD.... I LOVE YOU!!! 99 TA - ERL "DRY SLEEVE" LS3 447 CI STROKER/RPM Level 6 4L60E/MWC Fab 9 & 8.50 Cage d:-)~ 99 TA - LS1 l MS4 l FAST 92/N.W. 92 l Hooker LT's & TSP TD's l RPM LVL 5 l VIG 3200 Converter l 3.42's l MWC SUSPENSION l K&N FIPK l ETC.