Fuel Pressure regulator question

[Guy 1]

Right i've had a good look in autodata and it seems to suggest that the fuel pressure regulator on my highline will provide 3.5bar with the vacumm hose connected and 4.0 without.

Does this mean if i disconnect the vaccumm pipe and plug it that my fpr will see a constant 4 bar ?

I am aware of a cheap mod on it by 'dinging ' the sides or crimping it will raise the pressure but i dont want to cock it up and ruin the reg by this means if i can get another half bar of pressure by simply disconnecting it and plugging the hose.

Any thoughts gents?

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[FishWick 21]

Why not just fit a Corrado FPR which is 4 bar anyway? IIRC, the highine pump is only 3 bar anyway, so there would be no gain unless you fit the Rado 4 bar pump to go with the FPR.

Unless you have a reason to increase the fuel pressure at the rail, I.e mods, I'd leave it standard personally or you'll run too rich.

[Guy 1]

kevhaywire,

I knew the corrado fpr was a higer rated one and was considering it as my next move,

The reason i was considering a higher rating was Ads at AMD suggested fitting(or modifying my fpr to suit) a higher fpr and see,he was quite insistant.

I, like you said wont it run rich?

and he said no.. the lambda sensor will back it off but youll gain all the same.

Surely the pump is more than capable of producing more than 3 bar as on full tilt it wouldnt keep up if that was the case?

A 16v mk2 pump is rated at 5.5 bar so is always an option as I've a new one spare.

[RIX 0]

Why not just fit a Corrado FPR which is 4 bar anyway? IIRC' date=' the highine pump is only 3 bar anyway, so there would be no gain unless you fit the Rado 4 bar pump to go with the FPR.

Unless you have a reason to increase the fuel pressure at the rail, I.e mods, I'd leave it standard personally or you'll run too rich.

[/quote']

no my highline has 4bar pump(changed it last summer at 165tkm,because the filter had never been changed),it changed in 1996.