Think I Brought A Spud Gun To A Gun Fight…

[GeeTR]

Hi,

I’m putting a single turbo on a RB26, and aiming for 300-380kw@wheels.

Iv purchased a normal SARD FPR, not the “RJ” version, which I understand is required for over 500ps.

If [300kw x 1.34] x 1.2 = 482.4hp give or take, that’s 480ps already at the lower end of my intended boost settings.

I understand the RJ looks larger, and assume its got a wider diaphragm to maintain good pressure control at higher flow rates etc, but if anyone has any experience and can tell me if I can still use this Std version and what / when the limitations are?

Mucho thank’o

Michael

[LoNg_ShaNks]

ummm

[Adriano]

with the correst injectors, the standers regulator will be fine, 700cc will be plenty

[RB SANDY]

good topic name

[GeeTR]

Hey Adriano - I have SARD 700cc inj, plus a HKS rail and an 044, and figure I might as well set it up properly with a AM FPR and some dash fittings now. I grabbed the reg as I figured its peace of mind for a few 100 bux.

Cheers RB_Sandy

I’m looking for people who have had to change a FPR due to it being a bottle neck, and specifically those who own the Std SARD reg and respective power.

Thanks

- Michael

[GeeTR]

!Nudge Nudge!

No one runs a SARD Std fuel pressure reg on a car with more then 300rwkw's?

Iv heard of ppl using a Nismo reg on some very serious cars, think I'll just leave this one on, as it "muuust" be as good as a standard / Nismo unit.

Cheers

- Michael

[Sydneykid]

The Mines R34GTR with 600 ps, the Nismo ZTune with 650 ps and my RB31DET with 600 rwhp (I live in good company) all use the Nismo adjustable fuel pressure regulator (~$150 from Nengun) that bolts straight onto the end of the standard fuel rail. Yes the Gibson GTR’s used the standard rail as well.

The Mines engine bay (just for the doubters);

The Nismo Adj FPR looks like this, part number is on the box;

Cheers

PS; the search button is your BEST friend, there is virtually zero chance of you thinking of a question that hasn’t already been asked and answered.

[R31Nismoid]

Stock rail & stock reg is more than adequate, who told you it was a bottle neck? Very misinformed whoever it was

[Beer Baron]

i don't necissarily agree that a stock reg is the best way to go, mr nismoid. with a larger flowing pump, and high boost a stock reg i think may struggle to smoothly control fuel pressue. any reg with a larger, newer diaphragm has to be a good thing.

[RB30-POWER]

So the RJ version is still a 1:1 rising rate ratio like the standard Sard item is but just with a larger diapragm?

GeeTR, the standard Sard will be fine for the job (considering you could get away with a standard item if you wanted) I have the standard Sard one on my car and it works a treat.

Once your got a modified fuel system an adjustable reg is definitely the go, it just gives you so much extra flexibility to adjust pressures to suit the application.

[R31Nismoid]

i don't necissarily agree that a stock reg is the best way to go, mr nismoid. with a larger flowing pump, and high boost a stock reg i think may struggle to smoothly control fuel pressue. any reg with a larger, newer diaphragm has to be a good thing.

369rwkw @ 24psi, constant and even fuel pressure

I did it, and i'll do it again with the RB26

IMO, based on R&D with Racepace, it works fine.

[Roy]

LOL...change the AVATAR Ash...im having trouble reading what your saying. The thought of you doing ...ahem..hand feeding your monster makes me shudder.

[GeeTR]

SK and Nismoid - agree the stock rail & reg / nismo one are proven to

flow well, as with mines 600ps & Sk's 700ps, but can you quantify or

measure pressure response as per Barons comment.

Nismoid - thats a huuge amount of power on stock gear, a real

testament of OEM Nissan but i figure that on the street or track with

wildly varying engine load and fuel requirements, inconsistent

traction etc would stress the response of stock reg.

The rail i figure is a fuel distribution and tuning issue. At peak

engine torque and fuel requirement, your tuning to the detonation

limit of the weakest cylinder; people spend more on after market water

lines into the RB head, porting and CC'ing etc, I thought to limit individual EGT cylinder trimming.

I belive in not changing something until its a bottleneck or an

issue as well as anyone, but with the amount of money some people spent on super

expensive engine oils in a year, whats a few $100 on AM rail/reg and

some speedflow fittings at the bottom of a GTR's modification bill

RB-POWER - yup, thats what i was figuring, if stock is ok, then the std SARD unit it surely fine up to the 400rwkw's of my turbo.

Thanks all !

- Michael

PS - go gentle on the newbie

[R31Nismoid]

A testament indeed, that is what i set out to prove (was a 100% stock head aswell, 104 fuel)

Yeh traction goes up and down, as does load.

But i ran a few passes with it, around 25 or so. And it didnt give way. 4th gear, full song there really isnt much loss of traction, so definately 100% loaded up.

I would have liked to get to around say 50-60 passes (plus everything else) for a more involved test.

I went for a build on a budget, and i stuck to it. Main reason why i didnt spend more than i needed.

If however, you have the coin to burn, then by all means spend away dude.

It certainly wont harm the setup if done correctly.

[GeeTR]

Sounds like a package!! your a bad man for getting rid of it!

Nah, this is "accepting toilet seat down stuff" iv wanted a GTR since school, and plan to develop it for years to come, spending now on fuel / ancillaries, iv accepted.

- M

[R31Nismoid]

Sold the RB25 for an RB26 setup...

As the song does... the only way is up

[T88 ON BOARD]

If it helps...

on my gtr r32 I used a nismo Fuel reg (bolt on) pictured from sydneykid,

Intank Pump,standard lines,Sard700cc Injectors and the standard rail...

Making [email protected] it def will do the Job! although my fuel system was Maxed out on the dyno ???...

But for peice of mind on the gtr r33 i used Twin Bosch Pumps, surge tank, bigger lines, Sard rail and sard reg and sard 700cc Injectors...

: )

If you got the money...Spend it.... so you dont have to worry about fuel starvation