Turbo conversion, fuel pressure regulator?

[midge]

do you need to put an adjustable in there? or is all the standard stuff fine?

[Laine_16v]

Depends if the chips mapped for a rising rate FPR or not, i know Lee's Turbo clio has a FPR with vac connection on it, so it's rising rate.

Alsmot certtain coops is the same and no doubt maxiboy.

If your using a FastChip you'd need one i reckon.

[Coops]

pm replied and as above, rising rate required

[schakal]

i have a weber adjustable fpr setup for the turbo conversion
if you are after one

[stan]

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

[sideways danny]

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

that's what connecting the vac line does

[Laine_16v]

Unless you can map it to a static pressure of 3 bar? or do the injectors run out of puff at 3 bar on a turbo setup?

[sideways danny]

Unless you can map it to a static pressure of 3 bar? or do the injectors run out of puff at 3 bar on a turbo setup?

the reason you run a pressure/vac feed to the regulator is to sustain a constant pressure. Boost inside the inlet will create a restriction to fuel trying to exit the injectors, so you add boost pressure to fuel pressure and get a constant. If you run without a vac line attached, your fuel pressure is effectively being reduced by boost, so run 1 bar of boost, and you get 2 bar fuel pressure (in effect).

[AndyFielder]

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

[Laine_16v]

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

I believe the standard regulator works the opposite way around. I.e it decreases fuel pressure with VAC, to save fuel while cruising.