850cc SIDE FEED injectors -- R33 RB25DET

[RB38DETT]

SARD 850cc side feed injectors (SARD #63507), direct fit to R33 RB25DET, including collars and brand new connectors and o-rings. They have all been cleaned and flow tested in an R33 RB25DET rail and are high impedance, $900 for the set.

This set has not been used since the cleaning and flow testing, the cleaning and flow testing is worth over $300. These injectors retail for over $1700 for six and are rare to find at this very low price.

[Downforce]

Will these suit the standard fuel rail on a RB25DET(neo) from R34 GTT?

[RB38DETT]

Will these suit the standard fuel rail on a RB25DET(neo) from R34 GTT?

No, even though the NEO is RB25DET they are top feed, I have some 480cc in this section though

[RB38DETT]

By the way, because the NEO is high impedance and top feed your options are somewhat limited, direct fit that is. The biggest top feed high impedance injectors are 550cc. You would best either get a side feed rail from an R33 and use these injectors or try to get some top feed BUT if you get top feed they will be low impedance for sure and there will be wiring mods to be made. I would get an R33 RB25 rail if I were you, they're easy to find and there is always the non-turbo RB25 rail too.

[calvintys]

By the way, because the NEO is high impedance and top feed your options are somewhat limited, direct fit that is. The biggest top feed high impedance injectors are 550cc. You would best either get a side feed rail from an R33 and use these injectors or try to get some top feed BUT if you get top feed they will be low impedance for sure and there will be wiring mods to be made. I would get an R33 RB25 rail if I were you, they're easy to find and there is always the non-turbo RB25 rail too.

NO NO .... YOU are wrong, R34 NEO is special, changing the rail does not fit the injector. If you are going to fit RB26 or RB25 (r33 GTST) into R34 NEO you need to change you plenum too. Trust me i been into the problem before. Once again the injector will not fit into R34 NEO unless you want to change your plenum too.

[Downforce]

NO NO .... YOU are wrong, R34 NEO is special, changing the rail does not fit the injector. If you are going to fit RB26 or RB25 (r33 GTST) into R34 NEO you need to change you plenum too. Trust me i been into the problem before.  Once again the injector will not fit into R34 NEO unless you want to change your plenum too.

RaRRRr! Calvin has Spoken thanks for clearing that up man.

Good luck with the sale of your GTR too

[RB38DETT]

NO NO .... YOU are wrong, R34 NEO is special, changing the rail does not fit the injector. If you are going to fit RB26 or RB25 (r33 GTST) into R34 NEO you need to change you plenum too. Trust me i been into the problem before.  Once again the injector will not fit into R34 NEO unless you want to change your plenum too.

The side injectors do not fit the NEO rail, they do however fit the R33 RB25DET rail.

I am talking about using the side feed rail that comes on the R33 RB25DET onto a NEO RB25DET, I know the R33 GTR rail won't fit.

Are you saying that you tried an R33 rail onto a NEO? (from an RB25DET -- not GTR)

[3R1K]

calvin , does the 480cc fit neo?

[RB38DETT]

calvin , does the 480cc fit neo?

480cc on NEO works fine, done before.

850cc on R33 RB25DET works fine, done before.

As for 850cc on the NEO, I have NOT done a rail swap between the two types of RB25DET so I cannot guarantee that one.

[calvintys]

calvin , does the 480cc fit neo?

Eric if his injector look like this below then YES else GOOD LUCK... fuel rail will not solve the problem. The injector head need to go into you plenum.

http://www.skylinesaustralia.com/forums/at...achmentid=26073

[RB38DETT]

Eric if his injector look like this below then YES else GOOD LUCK... fuel rail will not solve the problem. The injector head need to go into you plenum.

http://www.skylinesaustralia.com/forums/at...achmentid=26073

Calvin, when I was talking about changing the fuel rail, I was meaning to fit the side feed 850cc onto a NEO, the R33 RB25DET has a side feed rail, are you saying you tried to fit a side feed rail onto an R34 NEO?

[RB38DETT]

Eric if his injector look like this below then YES else GOOD LUCK... fuel rail will not solve the problem. The injector head need to go into you plenum.

http://www.skylinesaustralia.com/forums/at...achmentid=26073

Those are HKS 480cc by the way, $300 a piece landed in Australia (x6)

[calvintys]

Calvin, when I was talking about changing the fuel rail, I was meaning to fit the side feed 850cc onto a NEO, the R33 RB25DET has a side feed rail, are you saying you tried to fit a side feed rail onto an R34 NEO?

The rail is a small potato problem, the major problem how are you going to stick the Injector head into the r34 NEO plenum. As the you look at the pic the injector head is very big as compare to orthers skyline injector.

Rail is when the fuel enter the Injector, plenum is when the fuel going out of the injector. Going out is the problem which i am refering.

[RB38DETT]

The rail is a small potato problem, the major problem how are you going to stick the Injector head into the r34 NEO plenum. As the you look at the pic the injector head is very big as compare to orthers skyline injector.  

Rail is when the fuel enter the Injector, plenum is when the fuel going out of the injector. Going out is the problem which i am refering.

On the side feed rail the injector heads are up further, the exit port on the rail comes out further than the injector heads, from memory there is a step that can fit an insulator to hold manifold pressure, I think this would be the way to go instead of mucking around with wiring, worst case scenario would be having to reem out the port on the plenum, all going well only an insulator would need be used. This is probably still a very viable option and cheaper than wiring in low impedance injectors (NEO needs high impedance), the combination of HIGH (note: edited) impedance and top feed is very rare purely because it yields an injector of poor response time (bad idle, poor tunability and less usable duty).

[calvintys]

On the side feed rail the injector heads are up further, the exit port on the rail comes out further than the injector heads, from memory there is a step that can fit an insulator to hold manifold pressure, I think this would be the way to go instead of mucking around with wiring, worst case scenario would be having to reem out the port on the plenum, all going well only an insulator would need be used. This is probably still a very viable option and cheaper than wiring in low impedance injectors (NEO needs high impedance), the combination of HIGH (note: edited) impedance and top feed is very rare purely because it yields an injector of poor response time (bad idle, poor tunability and less usable duty).

Well anyway i have try to sell one of my RB26 or RB20 injector to one of the workshop in melbourne, it was intend to put in on his R34GTT. The minute he remove his injector, he call me up and say there is no way i can put the injector into my RB25 NEO unless i change my plenum or something which i forgot. He was planing to custom a his fuel rail too if he injector fit but the injector head is a major problem.

Secondly is i have a friend whom bought a set of R33 GTST injector which intend to put on his R34 GTT but he end up selling it off dirt cheap.

Anyway are you sure your RB20 injector would fit on RB25 NEO. As far as i know RB20 and RB26 is the same injector and i have a set of RB26 injector with me now. They look soo much different interm on size and sharp.

Anway i guess i need to stop here.. good luck with you sale, Your price are dirt cheap.... it will be a great buy if it fit into RB25 NEO.

[RB38DETT]

Well anyway i have try to sell one of my RB26 or RB20 injector to one of the workshop in melbourne, it was intend to put in on his R34GTT. The minute he remove his injector, he call me up and say there is no way i can put the injector into my RB25 NEO unless i change my plenum or something which i forgot.  He was planing to custom a his fuel rail too if he injector fit but the injector head is a major problem.

Secondly is i have a friend whom bought a set of R33 GTST injector which intend to put on his R34 GTT but he end up selling it off dirt cheap.  

Anyway are you sure your RB20 injector would fit on RB25 NEO. As far as i know RB20 and RB26 is the same injector and i have a set of RB26 injector with me now. They look soo much different interm on size and sharp.

Anway i guess i need to stop here.. good luck with you sale, Your price are dirt cheap.... it will be a great buy if it fit into RB25 NEO.

Thanks yeah a lot cheaper than new and tested too.

Your friend should have used an R33 RB25DET rail.

My injectors are 480cc and 850cc, the 480cc can be used to upgrade both RB20DET and R34 NEO RB25DET -- I am sure, plus I know people running those injectors right now, simple to install, not speculation but fact, it's been done before. If you look at the important parts on the injector they are correct, same connector plug and same distance from top o-ring to tip, the tip only looks different because the 480cc use a different o-ring/grommet to seal the manifold pressure but fundamentally they are the same fitment and at a fraction of the price.

The 850cc side feed are for R33 RB25DET and are direct fitment. I believe that the R33 RB25DET rail could be used on the R34 RB25DET to allow side feed injectors to be used. I have a friend with an RB25DET head, I will look at the injector ports to see if there is enough room, I would be surprised if they redesigned the head when they already have an o-ring on the tip of the injector.

The RB20DET injectors are only 260cc top feed high impedance, an RB20DET injector can fit the NEO, they just need the rubber grommet to keep a tight seal for manifold pressure but they are less flow anyway so no point.

The R34 NEO RB25DET injectors are about 380cc, top feed high impedance.

R33 RB25DET injectors are 370cc side feed high impedance.

The RB26DETT injectors are 444cc top feed low impedance, need wiring mods, besides GTR injectors are too expensive as it is.

[calvintys]

I have put RB20 injector and RB25 neo injector side by side... compare it yourself. Even the spray patern is different too.

[RB38DETT]

I have put RB20 injector and RB25 neo injector side by side... compare it yourself. Even the spray patern is different too.

Spray pattern is not a big issue, four holes designed more for emissions, mono pintle is a bit better for fuel velocity at high rpm.

There is another part for the RB20 injector not shown in the picture, it goes around the pintle cap (injector head) and provides the seal for manifold pressure, it is wider and longer than the o-ring on the NEO injector and works on the NEO as well.

The distance between top and bottom o-rings are essentially the same, a thicker spacer is used at the top end and the larger o-ring is used, voila direct fit

[RB38DETT]

SOLD -- was a real good deal