Injection Fuel Pressure Regulator
Turbo Mini Forums

I took the 998 EFi Turbo out for a few runs today. Just to blow the cobwebs off and get some motivation to do work on some of the other cars.

First couple of runs were OK. Went Maplins at lunchtime to get some parts for the Miglia and it was running lean under boost.

Checked the fuel pressure when we got back and it was 0.5 bar lower than it should be. So wound it back up and it's boosting fine. A bit lean, but then it is cold again.

So my cheap Ebay FPR is NFG.

I'm looking for an alternative. Loads for £25 like mine on Ebay, but everything else seems to be about £100.

I've got an adjustable Sytec one for the Miglia and will probably get another the same:

http://www.merlinmotorsport.co.uk/p14718/F...oduct_info.html

Any other suggestions?

Are these SARD ones worth the money?

http://cgi.ebay.co.uk/NEW-GENUINE-SARD-STA...=item3a53f126c1

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

the problem is yours is too shiny,

you want one of these.

http://cgi.ebay.co.uk/FSE-Adj-fuel-pressur...=item3359c47773

The DON uses one very similar to that posted by Joe. We've had no problem with it, other than the cheapo gauge I put on the side crapping out and reading 4 bar all the time regardless of the pump on or off.

So one of these then:

http://cgi.ebay.co.uk/UNIVERSAL-FUEL-PRESS...=item2a047550b4

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

http://www.jbperf.com/

this is what i'm using (straight 1:1 ratio) i bougt it from this seller too, no issues with it in approx 5k miles now.



forgot linky....


http://cgi.ebay.co.uk/FUEL-REGULATOR-NOVA-...=item1c0f7fa2cb

Edited by Joe C on 6th Feb, 2010.

the fse and sard ones are great, i assume yours is an e-bay one with 4 bolts holding 2 polished / anodised halfs together with a gauge? these do work ish, get shite with time, and leak down on shutdown, that is to say you need a higher flowrate pump to keep the same pressure with one of these regulators that you would a decent brand.

they sytec ones just look like fse ones with a fancier top.and i have it in my head there the same company anyways..

the cheap regulators will also highlight a fuel supply problem sooner than a good regulator cause they leak down, bear that in mind :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

EDIT that sard one may be rising rate. would look into it before buying :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Yes, the one I have is one of those with 4 bolts and the polished halves.

It has not been consistant over the last 6 months really.


I think that this may be the one then:

http://cgi.ebay.co.uk/FSE-ADJUSTABLE-FUEL-...=item439b62e60c

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Why do you need an adjustable regulator? whats wrong with a fixed value that you will never ever have the itch to adjust it, lol Adjustable regulators just add more complexity where its not strictly necessary

I have a Weber Alpha 2.5bar one, brand new never been used if any one wants one. They also do the 3bar and 3.5bar. Fit and forget, and about £70 from the usualy suspects.

http://cgi.ebay.co.uk/FUEL-PRESSURE-REGULA...=item2eaacd5a9d

Edited by Sprocket on 6th Feb, 2010.

Colin, you have a very good point.

But I'm still developing the injection and would like the option of seeing the affect of winding up the pressure.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Ooh they also do an adjustable one

But I still dont get why it needs to be adjustable

http://cgi.ebay.co.uk/WEBER-ALPHA-INJECTIO...=item230462bbe0

Ive took plenty of those SARD ones off cars. Total piles of dung. One minute they work, the next fuel pressure is all over the place or sky high.

Fit only for the bin IMO.

What sort of fitment do you need ?

Really...pretty much any efi regulator will do. Steal an OE off a car if you can make it fit etc. 2wd Cossie ones are adjustable, and have simple hose tails I think.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Well, I've just fitted one of these:

http://cgi.ebay.co.uk/FSE-ADJUSTABLE-FUEL-...=item439b62e60c

I seem to be getting about 10% more fuel than I did on the rolling road, with no other changes, so I think the old one was a load of tat. Beware.

Bit hard to read gauges though when you get to 4k and the tyres break free

EDIT: Actually similar AFRs to the second rolling road, but it certainly feels better.

Edited by Paul S on 27th Feb, 2010.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I also have a cheap one thats going to be replaced.

Here's question, bear in mind its for the NA c20xe, what fuel pressure should i go with? its on standard bosch cream injectors.

I had it set at 3bar?

But i'm guessing its not really important and 2.5bar would keep it more than happy? if so, colin, want to get rid of that one you have?

I'm just going to get a fixed one to be honest. No messing then!

3 bar base is about right usually.

i seem to remember reading that going down toward 2 bar screws the spray up.

good job you love maths then..

I'd stick with 3 bar. That's what the injectors are designed for.

Any less and you might get a bit of dribble.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

how the hell did that post show up here!

Been on the beer already Joe?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

3 bar it is, looks like i'll order the same as you paul, looks a good price.

No! lol

lol well resurected.

Was thinking about the pressures myself earlier as ive just fitted a new pump to my mpi. I run the injectors at 2 bar (as originally set by Stuart Gurr) and they sit pre charger so dont experience boost pressure. The Haynes BOL says the standard fuel pressure for the mpi is 1 to 1.3 bar! So wouldnt that mean that the spray would be ok on these injectors down to 1.0 bar?