Fuel Injector Choice For Rb25

[hairdryer33]

Ive got a greddy plenum running stock injectors, im just wondering what my options are if I swap the fuel rail to top feed injectors? What types will fit xr6t etc? After something to make around 300rwkw

[scotty nm35]

Just about any top feed will fit under the greddy plenum, as long as you have an aftermarket rail kit to suit. Something around 1000cc would do you nicely.

[Ben C34]

Fuel will determine flow required. Onliine calculators exist to tell you the answer.

[hairdryer33]

Do the rails come in one size or is there different sized ones for different injectors? Do I need low or high impedance

[MagicMikeZ32]

RB25's are side feed aren't they?

I have it in my head that z32 injectors are the same. Same as sr20 and jz series also from memory...

Except 25neo.

Anyone confirm?

[MagicMikeZ32]

Confirmed Nismo 555's and 740's for Z32, sr20 and r33 rb25 are the same part numbers.

16600-RR543

and

16600-RR544

[GTSBoy]

OP. Here's a tip. If you want/need new injectors and you are going to have a Greddy plenum, then just PM someone like Scotty, tell him what you want to do and buy his recommendation from him. Saves you having to do the thinking and the finding out what you need. Just tell him what ECU, what plenum, what fuel and what power level and he'll sort you out with good modern injectors.

MagicMike. In this day and age, no-one needs to run old school crappy side feed Nissan shit injectors. Especially with a Greddy plenum. It's time to move on to Bosch 1000s, etc etc.

Edited October 28, 2014 by GTSBoy

[hairdryer33]

Ok thanks guys, going to go aftermarket fuel rail just makes sense and easier to find injectors

[chiksluvit]

Yeah go with the Bosch

Scotty should be able to sort your injector requirements out with decent price. Best of all he is in Australia and provides good after sales support

[KiwiRS4T]

+1 for scotty - tell him what you want to do and he will supply stuff that will fit and work.

[1kr33steven]

+1 for scotty and he is so adorable all up under a grand to do it properly but I did use a oem fpr kept price down

[chiksluvit]

Just curious how did you mount the FPR?

[Dose Pipe Sutututu]

even with stock plenum you can easily mount top feed injectors & rail without any shaving of anything

sidefeeds are gay.. they work ok.. but on a SR20.. I find with RB25s they are gay, many gays

[Ben C34]

John knows his gays.

[hairdryer33]

Made a small bracket to mount off strut tower. Have gone back to stock fpr for now. Rb25 are high impedance right?

[chiksluvit]

So you've remote mount the stock reg?

Just trying to find some ideas on how to mount the stock reg, EFI hardware adapter uses -8 o ring port which doesn't fit on cheapo aftermarket rails

[hairdryer33]

I did originally, and had an adaptor, but have gone back to stock for now. When I upgrade, I will be using an aftermarket fpr again. I was using an aftermarket one to bump the fuel pressure up. All good

[Sub Boy32]

http://www.nzefi.com/product/nissan-rb-1000ccmin-top-feed-direct-fit-fuel-injector-kit/

Easily our favourite injector at the moment, a true 1000cc out of the box Bosch injector, not a 550cc decapped one like the ID1000s, so the spray pattern is great.

[hairdryer33]

So why would I need 1000cc if I only need under 600cc for my hp goal? I get theres more head room if I wanted to get more power later down the track but is that it?

[KiwiRS4T]

And its just a better injector. No need to "bump up" the fuel pressure.