fuel pressure regulator/ power boost valve

[dazzle53]

hi i no it has been mentioned befor but i was wondering is it worth uprating this?
what is the standard pressure of fuel on a g40?

my cars running
stage 4 charger
gt inlet
newman cam
65mm pulley
uprated chip
gt inlet
4 branch
uprated fuel pump

think thats it

thanks
darren

[hayesey]

the fuel pressure reg is 3 bar.  The actual fuel pressure will rise and fall with vacuum and boost by the same amount as the vacuum or boost acting on the fuel pressure reg.  I.E. pressure reg is 3 bar, if there is also 1 bar of boost then fuel pressure will be 4 bar.  If there is half a bar of vacuum then fuel pressure will be 2.5 bar.

[hayesey]

well yeah, it's just a diaphragm with vacuum or boost sucking or pushing on it that varies the fuel pressure.  With 0 boost, 0 vacuum then the spring in the FPR will keep the fuel pressure at 3 bar.

[hardchargin40]

So dazzle53... basically the answer is NO.    No need to upgrade.

[dazzle53]

  sounds good to me