Originally Posted by Nick7

OK.. just a silly question - why would standard fuel pump be insufficent for, let's say 10psi?

It's not like that at 10 psi you'll use 4x more fuel than on non-turbo engine at WOT.
I understand need for inline pump for FMU, but for such pressures (stock) with larger injectors... I don't see a need - except maybe just to be on 'safe side' to put more quality pump.. but still.

AFAIK if you use 440cc injectors vs. 240cc you will at WOT in worst case use 2x fuel than before. And how many lph has stock pump? I bet more than enough....
With 990cc or similar.. yes, than I'd say upgrade...