Thanks for the link . A friend of mine who happens to have few 300ZX TT told me that the Z32 fuel pump (TT models) are known to support, dyno proven, arround 700 HP (speaking generic) so I didn't know if the GTR was the same fuel pump or had the same flow capacities as the Z32 pump (I googled it and couldn't find info) so I wanted to find out if my stock fuel pump would be enough for my 600 HP (crank) goal with upgraded fuel injectors and AFPR only or I would need a upgraded fuel pump anyways.
According to that link, seems like I would need a upgraded fuel pump at the end, however can't confirm if the GTR is the same as the Z32 fuel pump yet.