standard Fuel regulators

[slystiguy]

Does anyone have any information on factory fuel regulators? Particularly the non turbo ones that house red injectors? I was planning on using 2x non turbo fuel rails in my split rails setup but someone has mentioned I need to use turbo rails as the flow rates(on regulators) are different?

Any ideas on this one?

[subieboy]

I have only read internet forums speculation myself, as far as I could tell they had lower threshold than the turbo models

[rex-leggy]

non turbos dont require rising rate regulators . weather they change them im unsure.

factory rails are fine unless your looking for quite large power .

youll need turbo regulators unless subaru just put rising rate ones in everything. I find it hard to believe they made different size rails and that would be an uneconomical move by subaru.

[funkytown]

factory rails btw support 500hp no problems

as do factory turbo regs. just check on the non turbo reg\'s and your away laughing

[slystiguy]

Sorry meant to say the regulators don\'t flow as much***

Anyone know where I might find information on the regs? Google doesn\'t come up with anything

[lachlan]

so what rate that these stock "rising rate" regs ?

1:1 ? lol

[Roo]

Lol yep all pressure regulators with a vacuum source are rising rate it\'s just how they work

Yes 1:1 obviously but still rising rate

[funkytown]

are the best why? i call utter BULLSHIT on that sorry.

[lachlan]

 Roo said:

Lol yep all pressure regulators with a vacuum source are rising rate it\'s just how they work

Yes 1:1 obviously but still rising rate

lol so the rate doesnt rise ?

( now ill stop being sarcastic )

so its not rising rate .

applying boost to a reg does not make it "rising rate "

rising rate is one that fuel pressure goes up more than boost does . eg a 2:1 reg will give u 2 more psi fuel pressure for 1 psi boost pressure . or 4:1 12:1 etc . they are maunly usefull for cheating at systems of adding turbos to non turbo engines to get more fuel in under boost but stock fuel for vacuum parts of the map

2 na regs will work fine . if they can remove a bar from fuel pressure when given a bar of vacuum vacuum then they can add a bar to fuel pressure when given a bar of pressure

[Roo]

I know, but 1:1 the pressure still rises

Hence the name

[funkytown]

 Roo said:

I know, but 1:1 the pressure still rises

Hence the name

but technically you are wrong, its rate rises, not that it has a rising rate

So to clarify what Lachlan was saying is: "the rate rising, and rising rate are not the same thing".

in this context we are talking about a regulator which rate rises 1:1 with boost.

[rex-leggy]

grammar nazis out again

if the reg takes a vac source you can use it I just never had a close look at a non turbo reg

[lachlan]

its not grammar nazis . its noobs that dont know there is a standard fuel pressure reg which will take vac or boost .

then entirely seperate there is a rising rate regulator

of course the na one has a vac reference . i dont know what some of you think the purpose of a reg is

its to maintain the differential pressure across the injector . so when the manifold is + or - a bar of pressure the fuel mimics this so the injector is working at its design pressure .

if u had no vac on the reg under full vacuum the effective fuel pressure would be 3 bar + 1 bar vacuum so 4 bar fuel pressure = overfueling

[lachlan]

ill say it again . there is no grammar nazi about it ,

rising rate isnt open to your interpretation .

go and google it .

u are calling it a part that it is not . a standard fpr is unrelated to a rising rate reg

[funkytown]

cleaned. pointless arguing gets us no where. There is plenty of stuff on the internets people should go and have a read of.

this verifies Lachlan is correct. end.

[rex-leggy]

[hijacka]

They run 50psi static, which is 3.4 bar, and with vac source is 43psi when ever i\'ve measured it thats what the gauge says.