legacycentral bbs

Forget about the electronics and wiring, would you be able to bolt up everything between the heads and the MAF from an NA legacy to a Turbo engine? Would the Turbo injectors fit the NA rail? Are the gooseneck the same?

Reasoning would be if you got a bare EJ22T and needed all the other items. Sure you would have to deal with plumbing the right items and using the correct MAF and such but with stand alone engine management this would be possible right?

Think of how the EJ25 guys add a turbo. This would be like adding a turbo to a closed deck low compression NA engine.

ciper wrote:Forget about the electronics and wiring, would you be able to bolt up everything between the heads and the MAF from an NA legacy to a Turbo engine?

Mostly yes. Of course, the plastic tubing won't work, and the intake manifold won't have nipples for the pressure sensor or the blowoff valve actuator.

Would the Turbo injectors fit the NA rail?

I believe they would if the NA rails are from a 90 or 91 car. They won't fit in 92-94 NA rails.

Are the gooseneck the same?

What part is the gooseneck?

Where fluid comes out to the upper radiator hose.

What change was made to the rails between years?

I believe the sensors for the coolant are on opposite sides of the "goose neck" for the turbo and n/a, least that's what the parts manual shows. Other than that it looks the same to me.

Ah, yes, I call the gooseneck the "water manifold." And THAWA is right; the turbo water manifold has the sensors on the driver side. You just have to move the electrical connectors.

90-91 injectors are shaped differently from 92-94 injectors (all years of turbo use the 90-91 style). There may be more differences than just those two; I'm not certain. But if you manage to get your hands on EJ22T injectors there's a good chance you can get the rails with them.

I've looked a lot at the injector issue. The 90-91's are definitely different, they have more seals and other stuff. I'm not sure what kind the turbo's got. The AT & MT cars 90-91 got different injectors.

Not sure if it's the same for the EJ22, but I've currently got my EJ18 manifold mounted on a '93 EJ22T engine. I switched over the coolant pipe(gooseneck) that runs across the top of the engine since the position of the sensors was different, like THAWA mentioned. Either injectors would have worked but I just swapped over the injectors and rails from the EJ22T onto the EJ18 manifold, and they fit and work fine. Granted, the motor doesn't run the best on the 1.8 electronics and RS-T type setup, but it works. I definitely wouldn't run an EJ22T without forced induction, though; I think it would have equal or less power than my 1.8 did before I turbo'd it!

So ej18 injectors will fit an ej22t rail and intake and vise versa Sounds like its time for us to make a complete interchage list, then one of us pay to see what the modified version of common injectors flow. Unless of course someone on NASIOC beats us to it.

No, I think I_H8_1.8 put EJ22T injectors and rails on his EJ18 manifold.

I believe EJ18 injectors will fit 92-94 Legacy non-turbo rails though... But as I've already said in another thread, you can do the cheap injector mod to 92-94 Legacy non-turbo injectors.

If someone wants to pay for the costs, I'll ship my 4 modded 92 Legacy non-turbo injectors to RC Engineering and have them flow-test them.

92 non-turbo injectors flow around 270-277 cc.

I've got a printout from rceng for the injectors I put in my car....before and after. Someone remind/pm me (I know there was something else I was supposed to do...but forgot) and I'll scan the page

vrg3: How much, if the 92-94NA injectors will physically fit into the Turbo rails I wouldnt mind to help pay for the flow testing.

92-94 NA injectors will not physically fit into the Turbo rails. However, 92-94 NA rails will bolt right up to Turbo manifolds/fuel pipes/FPRs/etc.

I will send an email to RC Engineering to ask them how much flow testing costs. I have no idea how the logistics work so I'll find out.

Okay, so if I converted to 92-94 NA rails what other injectors fit?

Some people say that certain side-feed Nissan injectors fit 92-94 NA rails. I don't think there are any stock USDM ones that flow more than stock EJ22T injectors, but some JDM or aftermarket ones do. From pictures they look almost identical in shape, but I haven't fit any myself.

"any stock USDM ones that flow more than stock EJ22T injectors"

Stock is the key word. Rumor has it that ej18 injectors will flow 400+

I meant any stock Nissan injectors.

I expect that these modded EJ22 injectors will flow the same as or more than modded EJ18 injectors.

Keep in mind that modded injectors appear to have a less desirable flow pattern than stock.

Less desirable for emissions? Im not sure if it helps with power output.

You're right. The difference will show up mainly under light loads, like when idling or cruising. So it'll mostly just affect emissions and fuel efficiency, not peak power at WOT.

vrg3 wrote:Some people say that certain side-feed Nissan injectors fit 92-94 NA rails. I don't think there are any stock USDM ones that flow more than stock EJ22T injectors, but some JDM or aftermarket ones do. From pictures they look almost identical in shape, but I haven't fit any myself.

Hmm...I thought all Nismo side-feed injectors worked on the Turbo rails or at least the 92-94 turbo rails. Am I wrong?

I was thinking about going with some 550cc Nismo injectors that are for the 300ZX eventually.

And what's this about the ej18 injectors flowing 400cc+?

Hey vrg, have you tried modding a 92-94 turbo injector yet or is it not possible?

legacy92ej22t wrote:Hmm...I thought all Nismo side-feed injectors worked on the Turbo rails or at least the 92-94 turbo rails. Am I wrong?

I don't know.

I have seen pictures of some Nissan injectors that look to be the same shape as Legacy Turbo injectors (which look to be the same shape as 90-91 non-turbo injectors). I have seen pictures of some other Nissan injectors that look to be the same shape as 92-94 Legacy non-turbo injectors.

I was thinking about going with some 550cc Nismo injectors that are for the 300ZX eventually.

Those would probably fit one of the two types of rails used on BC/BFs.

And what's this about the ej18 injectors flowing 400cc+?

I think ciper means after the cover plate is removed.

Hey vrg, have you tried modding a 92-94 turbo injector yet or is it not possible?

92-94 turbo injectors are the same as 91 turbo injectors. They don't appear to have the same kind of metal cap, so I don't think they can be modded the same way.

So 92-94 turbo injectors and 90-91 injectors are the same, the 92-94 NA injectors are different but nissans should fit?

ciper wrote:So 92-94 turbo injectors and 90-91 injectors are the same

In shape.

Yes, I think so.

the 92-94 NA injectors are different but nissans should fit?

Some Nissans.

Yes, I think so.

I also think some Nissans should fit 90-91/Turbo Legacy rails.

Do the nissan injectors have a different clip? Do they have a different resistance?

Yes, they have a different clip. I don't know about the impedance. If Nissan injectors are low impedance it shouldn't matter too much; if you're wiring in new clips anyway, it's not a big deal to put ballast resistors inline with them.

here's the sheet with the balancing info

http://www.main.experiencetherave.com:8 ... orcalb.jpg