4psi extra fuel in a rail running 73.5psi isnt going to allow us any more safe boost boost at all to be honest, it will just stress the pump and fuel lines some more
yes that helps Stu, thanks. is 1.2:1 all that you can get then?
say you had 2:1 running at 1.5 bar boost, you'd have a rail running [3.5 + (1.5 * 2)]*14.7 = 95.6 psi = 6.5 bar.
that is the equivalent fuel rail pressure of a std regulator seeing 3 bar boost. this sounds like a lot, but is it really stressing the pump (compared to 2 bar boost on greys)? if you're doing this on yellows, the volume the pump needs to supply is not greatly increased. if it's ok for the pump, surely an extra 1.5 bar, or 22 psi is worth having?
how does this fuel pressure increase translate into injector flow / power anyway?