Depends on the setup and tuner. N1GTR's car called it enough at 403 rwkw on 1000's, now runs 2000's.
All this talk about "oh they're so big, the driveability, idle and fuel economy will suck", go for a drive with them installed in a car. Injector technology has moved on fromthe mid 90's or whenever stuff like the Sard/Denso/Nismo/whatever were designed!!!!