Barpk - When I said boosted i mean the cars me and my friends have messed with! ( They have all been tourbocharged! or we haven't bothered touching the fuel pump!)

When I said fuel press was set at 6 psi I am saying that when the car isn't running any boost pressure this is where the feul pressure has been set! ( I am basically saying that whether the car is boosted or not( meaning not turbocharged) the needle and seat can handle 6psi fuel pressure!)

The reason we set it to this much ( 6 psi )
Is so that when we run any boost pressure the fuel pressure is always going to be atleast 6 psi more than the boost psi!
( If you still don't understand go back and read all of the stuff I have written and what others have tried to explain in simpler form!
Other wise all I can say is try and see for yourself then you will work out what works and what doesn't! )

And I couldn't be bothered repeating myself as I get sick of it and I bet others do too!
( Plus I makes me seem like a ( I think I know it all! ) Wanker!