1) 400 to make it and then 360-380... rwHP yes this is accurate. rwKW your aiming for the stars with a bow and arrow
Since you didnt mention forged internals ill assume youre talking stock bottom end and horsepower not kilowatts; correct me if im wrong.
If you are talking horsepower then your setup is similar to my car (at tuners as i type this..)
Disclaimer: anyone please correct me if im wrong, and please get more than just my lowly opinion, but this is my 2c.
==>Stock bottom end and a 3076R, depends on what housing is on the turbo but 18psi is a good safe limit (and should see the numbers you want with boost around 3500rpm..)
==> Injectors youll be looking at Nismo 555s, Sard 550s or the like.
==> Bosch 044 will be more than enough from what ive read. and again correct me if im wrong here readers but 044 are mounted externally and are a decent chunk more expensive than an in tank replacement style pump. I think for 400rwhp a tomei in-tank would probably be enough and cheaper.