Turbo conversion, fuel pressure regulator?

[AndyFielder]

oh ok, didnt know that!!

[sideways danny]

doesnt the standard fuel rail and reg work, it has a vaccume line...

YES!!!!! reduced pressure with vacuum, increased with boost. Just like any regulator

[stan]

yes, as fuel pressure needs to increase proportionally to intake boost pressure.

that's what connecting the vac line does

i know

what im saying is, not all vac ones INCREASE fuel pressure.

[AndyFielder]

so can i just confirm standard fuel lune and reg wont work?

[Coops]

it will work to a certain extent but not above around 10psi or so i've been led to believe, never tested it myself but for the sake of 50 quid its worth the 'upgrade' as it were to be safe imo

[sideways danny]

got it working fine at around 15 psi on a stock regulator.

The only benefit you might see with an upgrade is a greater range of correction, ie, if you were running 2 bar for example (extreme case) the stock reg would likely be out of range

[stan]

When I tested one, couldnt get it to correct more than 5psi.

[Crossers]

Standard one worked fine on mine.

Paul

[volymmannen]

standard works but if you want increased fuel pressure at higher boost, you want a progressive fpr.

linear fpr 1:1 ex 3bar fuelpressure is always 3bar over manifold pressure
Progressive ex 1:1,2 at 1bar boost you get 3x 1.2 = 3,6bar