Universal Fuel Pressure Regulator

[Matt Cole]

I'm having problems with one of these:

http://cgi.ebay.co.uk/NEW-SUBARU-IMPREZA-WRX-FUEL-PRESSURE-REGULATOR-GAUGE_W0QQitemZ380074665348QQcmdZViewItem?hash=ite m380074665348&_trkparms=72%3A1299%7C39%3A1%7C66%3A2%7C65%3A12%7C 240%3A1318&_trksid=p3286.c0.m14


Its feeding the 225 fuel rail. The problem is the inline gauge i have plumbed in fluctuates from the set 3bar to zero when cranking the engine/when the injectors are firing. Now the standard regulator on the 225 works similar to the gtt's in that it has three ports, one fuel in, one to the the rail and one return. This regulator has a gauge in one of the ports as many cars have the return on the other side of the rail. I just took out the gauge and piped it to the the fuel rail and placing a gauge inbetween. Any ideas on whi its doing this or is the FPR not designed to work the way i want it to?? Could it be the pump if not?? I get to adjust the pressure to any level i want so pressure aint the problem. Could it be flow rate??

Ps the only thing i aint done is attach the vac pipe as yet, so not sure if thats causing a problem??

[Andrew Cooke]

I'm having problems with one of these:

http://cgi.ebay.co.uk/NEW-SUBARU-IMPREZA-WRX-FUEL-PRESSURE-REGULATOR-GAUGE_W0QQitemZ380074665348QQcmdZViewItem?hash=ite m380074665348&_trkparms=72%3A1299%7C39%3A1%7C66%3A2%7C65%3A12%7C 240%3A1318&_trksid=p3286.c0.m14


Its feeding the 225 fuel rail. The problem is the inline gauge i have plumbed in fluctuates from the set 3bar to zero when cranking the engine/when the injectors are firing. Now the standard regulator on the 225 works similar to the gtt's in that it has three ports, one fuel in, one to the the rail and one return. This regulator has a gauge in one of the ports as many cars have the return on the other side of the rail. I just took out the gauge and piped it to the the fuel rail and placing a gauge inbetween. Any ideas on whi its doing this or is the FPR not designed to work the way i want it to?? Could it be the pump if not?? I get to adjust the pressure to any level i want so pressure aint the problem. Could it be flow rate??

Ps the only thing i aint done is attach the vac pipe as yet, so not sure if thats causing a problem??

I'll take a guess that there is a restrictor in the port that the gauge plugs into (to dampen the gauge). Swap things about so that you're not flowing fuel through that port.

Now for the finger wagging - cheap pressure regulators are a liability, I paid a lot of money for my SX one, either use OE, or quality parts. Any instability, or slow response will directly effect your fuelling, and you'll never map it out.

[Matt Cole]

Andy, i think the gauge port maybe 1/8 mm and the inlet/return are 1/4. I'll have to check. Can't remember a restricter in the gauge port itself, its pretty simple in operation.

Point taken on the cheap gauge, any recommendations for my setup??

[Andrew Cooke]

Ok, there is another possibility, although I don't think it's likely. The return (includes pipework) isn't sufficient with the engine off. This would give an artificially high static pressure, once you start to flow through the injectors the pressure will drop to the real static pressure.

This is what I bought http://www.sx-performance.com/15404.pdf

[Matt Cole]

Ok, there is another possibility, although I don't think it's likely. The return (includes pipework) isn't sufficient with the engine off. This would give an artificially high static pressure, once you start to flow through the injectors the pressure will drop to the real static pressure.

This is what I bought http://www.sx-performance.com/15404.pdf


Ok something to check. The gauge flickers rapidly between 0 and 3 bar when cranking, seems strange. I take it the needle should not 'flicker' at all when cranking??

[Andrew Cooke]

Ok something to check. The gauge flickers rapidly between 0 and 3 bar when cranking, seems strange. I take it the needle should not 'flicker' at all when cranking??

I'd hope it would hold a steady pressure. Don't forget to connect the ref pipe to where ever the injectors squirt.

[Matt Cole]

I'd hope it would hold a steady pressure. Don't forget to connect the ref pipe to where ever the injectors squirt.


? Not sure what you mean matey?? I though it would just pop into the inlet maifold?? Could this stop the fluctuations if the regulator sees a vacuume?

[Andrew Cooke]

? Not sure what you mean matey?? I though it would just pop into the inlet maifold?? Could this stop the fluctuations if the regulator sees a vacuume?

it won't stop any fluctuations.

if your injectors squirt into your manifold then connect the ref pipe there. The actual position doesn't matter as long as it's the same side of the butterfly.

[Matt Cole]

Andy, where did you get your regulator from?? Any other type of regulator i could buy in the uk you would recommend??

[Mart]

SARD.

[Matt Cole]

SARD.


Looked at these mart, they seem bulky and i havent come acroos a 3 port one unless the gauge is removed.:(

[Andrew Cooke]

Andy, where did you get your regulator from?? Any other type of regulator i could buy in the uk you would recommend??

I can't remember, it was a few years back. I wouldn't want to suggest anything else, that isn't to say that there aren't perfectly good alternatives out there.

[Mart]

Looked at these mart, they seem bulky and i havent come acroos a 3 port one unless the gauge is removed.:(

I Googled 'Sard fuel regulator' and this was the first page to come up...

http://www.neweraparts.com/Default.aspx?tabid=54&CategoryID=116&List=0&Level=a&ProductID=530

Same as what I've got, although not yet fitted on the Evo. It isn't that big/bulky in fairness.

SARD have got a seemingly good reputation in the Jap tuning world, for what that's worth...

[Andrew Cooke]

SARD have got a seemingly good reputation in the Jap tuning world, for what that's worth...

not much then :laugh:

[Mart]

:D

[Woznaldo]

Turbosmart have a good rep in Oz and seem to be popular in the drift and drag world in the States too:

http://www.turbosmartonline.com/index.php?id=38

[i l k e r]

New poster! (less than 10 posts)

the fr4k further down the page looks to be the same with Andy's and they're based in Surrey mate


http://www.sbdev.co.uk/Fuel_Systems/Fuel_Pressure_Regulars/Fuel_Pressure_Regulars.htm

[i l k e r]

New poster! (less than 10 posts)

or;

http://www.andyforrestperformance.co.uk/26032.html?*session*id*key*=*session*id*val*

hope this helps

[Matt Cole]

Thanks all, found this one looks like it could do the job:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=350116349267&ssPageName=ADME:X:RTQ:GB:1123

Its amazing though how many companies do not know how their products work:crap:

[Andrew Cooke]

Thanks all, found this one looks like it could do the job:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=350116349267&ssPageName=ADME:X:RTQ:GB:1123

Its amazing though how many companies do not know how their products work:crap:

I don't think Aeromotive STYLE is the same as aeromotive.

[Mart]

:crap:

[Matt Cole]

Whats wrong with it??

[Andrew Cooke]

Whats wrong with it??

at a guess I'd say it a POS ebay replica part and well worth avoiding.

[dj13]

New poster! (less than 10 posts)

393 sard fpr .hardly bulky.lol. These are all interchangeable between carb and fuel injection.

[Ashy]

just get a cossie one, they work fine...

http://cgi.ebay.co.uk/GGR720-RS500-Sierra-Cosworth-Fuel-Pressure-Regulator_W0QQitemZ160250702426QQcmdZViewItem?hash =item160250702426&_trksid=p3286.c0.m14&_trkparms=72%3A1121%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318

[Matt Cole]

just get a cossie one, they work fine...

http://cgi.ebay.co.uk/GGR720-RS500-Sierra-Cosworth-Fuel-Pressure-Regulator_W0QQitemZ160250702426QQcmdZViewItem?hash =item160250702426&_trksid=p3286.c0.m14&_trkparms=72%3A1121%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318


Roger that ash, although which bank am i robbing for that!! It wants to be at least shiny for that price!!:D

What about a reg off a vauxhall 3.0 senetar?? Are the regs on turbo cars much different to n/a versions??

[Andrew Cooke]

what's the EVO one look like? if it mounts up OK we just need to get Mart to fit his highly-rated-in-the-jap-world regulator and hang around by his bin ;)

[Mart]

I'm happy running @ 3bar base at the mo - Plenty of headroom on the injectors for now.

Matt, if you're in a pickle, and desperate to get your hands on an fpr, I'll sell you this Sard one that I've got.

[Matt Cole]

I'm happy running @ 3bar base at the mo - Plenty of headroom on the injectors for now.

Matt, if you're in a pickle, and desperate to get your hands on an fpr, I'll sell you this Sard one that I've got.

Mart, thats mighty nice of ya good sir! :agree: Ive had a look at it and im not sure if it will work. Does it have 3 dedicated ports, 1 in ,1 return and 1 to the rail? If so thats what i need. I notice on many that they have 1 in 1 to the rail and a gauge port. The return is taken care of by the fuel rail.

[Mart]

Aii mate, it's a 3-port job (*). Namely fuel in, fuel return, and ya map reference point.

It's got 2 x 8mm tails for the fuel lines, and 1 x 4.5mm tail for the map pipe. Pressure adjustable from 200-800 kpa (2-8 bar in old money). Brand new shmoo, never been used, and I've got the mounting plate for it as well.

* Actually, it's a 4 port jobby as there's a plug blanking off another port, which could be used to feed a fuel pressure gauge, 2nd fuel rail, etc.

If you want it, drop us a PM squire...

[Mart]

This is it...

http://www.neweraparts.com/DesktopModules/CATALooKStore/MakeThumbImage.aspx?ID=%2fPortals%2f0%2fimages%2fp arts_images%2fSARD_FuelPressure_Regulator_a.jpg

[Matt Cole]

Aii mate, it's a 3-port job (*). Namely fuel in, fuel return, and ya map reference point.

It's got 2 x 8mm tails for the fuel lines, and 1 x 4.5mm tail for the map pipe. Pressure adjustable from 200-800 kpa (2-8 bar in old money). Brand new shmoo, never been used, and I've got the mounting plate for it as well.

* Actually, it's a 4 port jobby as there's a plug blanking off another port, which could be used to feed a fuel pressure gauge, 2nd fuel rail, etc.

If you want it, drop us a PM squire...

Thanks mate, it looks lovely, but im still in doubt if that gauge port will feed the fuel rail correctly as this is the type i have at the moment and could be why the fuel pressure drops/fluctuates when the injectors open? I could be completely wrong mind so just eliminating the possibility. Are there any instructions with it me old??:agree:

[Mart]

:confused:

The reg' doesn't fuel the rail as such, it sets the fuel pressure of the supply circuit.

Why would use the gauge port anyway?

[Matt Cole]

:confused:

The reg' doesn't fuel the rail as such, it sets the fuel pressure of the supply circuit.

Why would use the gauge port anyway?

The 225 rail does not have a return to tank like most cars do. Its a similar setup to a cosworth and even the gtt's regulator to some extent.

So i need a 3 port reg. that has dedicated ports:

1) port for fuel in from the pump
2) port to return to tank
3) port to go to fuel rail.

3 port regs normally have the the fuel pressure line plumbed directly to it.
2 ports normally have a line plumbed to them from the fuel rail.

When the pressure in the rail gets to its max setting the regulator opens and diverts fuel away to the return port back to the tank. 2 port regs normally go after the fuel rail and maintain rail pressure by regulating against the pump using the rail return as the feed.

This is for external regulators. There are also attached rail regulators ala clio 172.

[Scoff]

matt, tell me to bog off if I'm missing the obvious but what's stopping you from using a normal EFI reg (2 fuel ports like the one mart posted a picture of) ?

pipe like this:

send from pump direct to fuel rail...
fuel-in port of reg Tee'd into the "send" pipe mentioned above...
fuel-return port from reg to tank return, as normal...
air reference pipe to manifold, as normal...

the normal EFI regulator has 2 fuel ports, effectively. One that normally clamps onto the "return" end of the rail, the other is the return to the tank. It works by restricting the return path in order to build up pressure in the rail.

fitting the regulator with a 'T' piece as I describe will work in the same way. It'll restrict the return path so as to keep the pressure in the send pipe (and rail) at 3bar (or whatever).

[Scoff]

something like this:

you'd probably want to place the T piece close to the regulator and use good bore hose from the regulator to the rail and no longer than it needs to be.

[Mart]

:agree:

[Matt Cole]

Chaps, bloody ignore me, i should be shot with ****!!:ashamed:

Of course that would work!!! Doh. ........................Sometimes its got to be explained the baby way!!:agree:

Mart pm on its way.

[Scoff]

mart, I accept paypal :D

[Mart]

.

Oh look, there's one of those invisible posts again...

:D