Help Regarding Buying Parts From Nengun

[AlexCim]

OK,

Its time for me to buy some stuff off NENGUN. I want to get

Sard 550cc injectors but I am confused about something

http://www.nengun.com/catalogue/product/190

63508

Nissan RB25DET (6 injectors/ long ) - Side Feed - High Impedance (Not suitable For Neo Straight 6 ) RB25DET

63509

Nissan RB25DET (6 injectors/ Short ) - Side Feed - High Impedance (Not suitable For Neo Straight 6 ) OUT OF STOCK 63508 is suitable RB25DET

What the hell is long and short?? Which one should i get?

Next, do i need to buy collars to suit?

http://www.nengun.com/catalogue/product/345

I am also wanting to buy (around now)

- 044 (is the 040 suitable for ~250awkw?)

- Do-luck rear cross brace (not needed, but wanted...anyone know if it makes a difference?)

- Z32 (already bought it)

- Exhaust cam pulley

- Cusco brake cyl stopper

This is in prep for my manual conversion which will mean a PFC is being installed, so ill be seeking a temporary tune of about ~180awkw until i can afford a better turbo. These parts are being bought as supporting for the conversion, anyone else think of something i may need?

Cheers,

Alex

[AlexCim]

Would i need a FPR too?

[PranK]

Alex, I can only comment on the FPR, but for ~$150 delivered, the Nismo one is *really* good and is still regarded one of the best ones out there. Mine will be arriving soon.

Um... just thought I'd throw that out there.

[Sydneykid]

OK,

Its time for me to buy some stuff off NENGUN. I want to get

Sard 550cc injectors but I am confused about something

http://www.nengun.com/catalogue/product/190

63508

Nissan RB25DET (6 injectors/ long ) - Side Feed - High Impedance (Not suitable For Neo Straight 6 )  RB25DET

 

  63509

Nissan RB25DET (6 injectors/ Short ) - Side Feed - High Impedance (Not suitable For Neo Straight 6 ) OUT OF STOCK 63508 is suitable  RB25DET

What the hell is long and short?? Which one should i get?

Next, do i need to buy collars to suit?

http://www.nengun.com/catalogue/product/345

I am also wanting to buy (around now)

- 044 (is the 040 suitable for ~250awkw?)

- Do-luck rear cross brace (not needed, but wanted...anyone know if it makes a difference?)

- Z32 (already bought it)

- Exhaust cam pulley

- Cusco brake cyl stopper

This is in prep for my manual conversion which will mean a PFC is being installed, so ill be seeking a temporary tune of about ~180awkw until i can afford a better turbo. These parts are being bought as supporting for the conversion, anyone else think of something i may need?

Cheers,

Alex

<{POST_SNAPBACK}>

Hi Alex, my understanding is the Sard injectors that are used in RB25's are equally intended for use in 1/2JZ's, which use a the same shape injector with sligtly smaller external dimensions. So they need adaptor collars to fit RB25's. That is why Sard injectors are cheaper then other brands that fit RB25's, Sard have amortised the cost over the much larger combined volume of RB25's and 1/2JZ's.

cheers

[AlexCim]

So, Should I be buying the "long" or the "short" injectors?

[-FUZZY-]

are RB25 injectors top or side feed??

alex .... if u order the NISMO Fuel pressure reg let me know, as l'll prolly go one too.

Pending the price of the walbro 040 .... you may find it as cheap, or damn close to it out here.

[AlexCim]

Side feed high impedance for S1, i beleive the NEO's are topfeed

I will be buying my Bosch fuel pump from the sponsors here, but not sure if i should just got he 044 so that i just dont have issues in future..

Chances are i will get the NISMO FPR because the SARD one costs ~350...bugger that, not for 250awkw

[Tangles]

Go the Nismo FPR item & looks like top quality, Ive got mine at home (with an Apexi fmic, Z32 afm, turbo for a GT30 rebuild, and Apexi SITC) waiting to go on my car.

If you're doing the fuel pump, do the high pressure fuel lines as well, as per SK's suggestion. $100-odd for the lines and double clamps is cheap insurance, if you're putting more pressure thru the lines.

I too am wondering which fuel pump to buy, the 040 or 044. Only after 180-200awkw, but the GT30 rebuilt turbo will be able to supprt more than that.......

[AlexCim]

well, the 040 is ment for up to 500hp, the 044 over that to 1000, so i will be going with the 040 for $220 or $230, around that

I wonder what type of shop i should look for to do the fuel lines for me? I dont know if my workshop would be the best place to replace fuel lines..??

Would the fuel lines be something i could easily for at home?

This is the FPR we are all talking about right? http://www.nengun.com/catalogue/product/21

PS. Does anyone know where the fuel filter is? I would like to change it on my next service.

Edited October 20, 2005 by AlexCim

[Tangles]

SK said, $100 would cover lines and double clamps at each end to the following:

(use 2 X stainless steel clamps (they are ~$3 each) on each end of the hose)

1. from the pump to the steel fuel line in the boot.

2. from the steel fuel line to the fuel filter (under the plenum)

3. from the fuel filter to the steel fuel line around the plenum

4. from the stell fuel line on the plenum to the fuel rail.

The Nismo adjustable fuel pressure regulator on Nengun recently cost me $163 incl delivery. Was specifically to suit the RB25.

Whoever does the fuel pump can easily do the fuel lines.... I dont trust myself, so my workshop will do it (they are general service mechanics who happen to drive Skylines).

[AlexCim]

Ah, yes, stupid Celsiors kept me thinking it was somewhere under the boot!

Where would i buy these fuel lines? Sounds like a job that i will do myself, as i will give the pump a go too.

BTW, i dont see any rb specific NISMO FPR, only the one in the link above.

[Tangles]

That link doesnt go anywhere as such as it'd be for your personal account, Ive got the following item, but it is not fitted up as yet so I cant state for a fact that it'll bolt straight up (Im 100% it will):

1 x Nismo - Fuel Regulator

Nismo Fuel Regulator 22670-RR580 AU $ 144.57 plus Paypal fee (plus delivery by memory) ended up being around $160+

As for fuel lines, maybe contact Sydneykid and ask where he goes to. Im leaving that all for the shop (Im time poor being a fulltime worker, parent, student, etc etc).

Good luck with it mate, I reckon I'l just go the $230 #040 Bosch fuel pump, and I wont go Walbro as I cant be sure it'd be a genuine Walbro and not a cheap copy.

[pure_methamphetamachine]

RB25DET have 2 types of injectors, one for the Neo, one for R33 RB25det. Neo is top feed, and also a one off size. Nismo make a 480cc for the neo. Sard do one that will fit with a bit of modding to the rail.

For r33 ones, they are side feed and you have to buy collars and get the long ones if you choose Sard.

[rb30dett]

Why would you buy a fpr when you are replacing the injectors anyway? sounds like a waiste of money. nismo regulators are good but you dont need to increase the fuel pressure when you have upgraded the injectors. my 2c

[Sydneykid]

The Nismo FPR we use is part #22670-RR580. It bolts onto the end of the fuel rail, replacing the standard FPR. That same part number fits SR20, RB26 and RB25 fuel rails.

The picture that Nengun have on their web site is not of part #22670-RR580, this is a picture of a real #22670-RR580

The Bosch 040 in tank should do the job for 250 4wkw, you can use the standard wiring with 040's to get high and low flow rates. They don't draw the same current as 044's.

High pressure, fuel injection hose can be bought from any parts shop (Repco, AutoOne, AutoPro, AutoBarn, SupaCheap etc) or any hose shop (Enzed, Pirtec etc). They also have suitable stainless steel clamps. I use 2 clamps per joint up to 45 psi fuel pressure. Over that I go to screw on fittings, I don't trust slide on hoses and clamps. Fuel fires are nasty.

You won't need an adjustable Fuel Pressure regulator (AFPR) or hoses or clamps if you are using appropriately sized injectors and fuel pump. The standard stuff will hanble it just fine, becasue you are not raising the fuel pressure. You only need an AFPR (to raise the fuel pressure) if you need to push the injectors (just a little, never a lot ) to make the power target.

These are the three styles of injectors used in RB's. From left to right, the top feed RB25 NEO style (all blue), the side feed RB25 (non NEO) style (pink/purple top) and the top feed RB20/26 style (blue top).

As you can see they are not physically interchangeable. The side feed RB25 (non NEO) style injector is high impedance, the top feed RB20 is also high impedance but the RB26 style top feed is low impedance (ie; needs a resistor pack).

I hope that answered all of the questions

cheers

[StageZilla]

sk ive been wondering if a FPR is needed on a 600-700hp at wheels engine with 1000cc injectors? or is only for that simple reason of pushing the injectors that little extra bit?

always wondered

[Sydneykid]

sk ive been wondering if a FPR is needed on a 600-700hp at wheels engine with 1000cc injectors? or is only for that simple reason of pushing the injectors that little extra bit?

always wondered

<{POST_SNAPBACK}>

You won't need an AFPR, the injector flow rate of 1,000 cc's is measured at standard fuel pressure (36-38 psi), that's above boost. eg 38psi fuel pressure + 20 psi boost = 58 psi. Bosch pump's flow is rated at 73.5 psi. The quick (in a 6 cylinder) calcs;

1000 cc's = 1,000 bhp - 115 bhp for losses (the most I have ever seen in a GTR) = 885 4whp (660 4wkw).

You have penty of injector overhead, almost 200 bhp of it.

The only reason you might want to upgrade the FPR is accuracy of holding the fuel pressure at higher boost levels. Nothing to do with flow regulation or pushing injectors to higher than their rated flow.

cheers

[StageZilla]

thanx for the explanation gary, much appreciated

[AlexCim]

So, because i will be getting 550cc injectors (NISMO striaght fit) you dont think i will need the FRP?

I wanted to mount a 044 intank, but after reading a thread "too big a fuel pump" i will just get the 040 intank.

If in future i need to (for whatever reason) i can just use the 040 intank, surge tank, and an 044 from the surge tank