Jump to content
SAU Community

Recommended Posts

The times come for me to get a fuel system upgrade in order for me to reach my goal of 300-320rwkw in my RB25DET NEO

Ive read a couple of posts on this topic but the info was quite scattered and not very helpful

Ive got my fuel pump already and now need to know what the most common upgrade for fuel rail, injectors and fuel reg if i need one :D

So if you can post your fuel system upgrades and or any other info on this topic that would be awesome :P

Cheers :down:

The times come for me to get a fuel system upgrade in order for me to reach my goal of 300-320rwkw in my RB25DET NEO

Ive read a couple of posts on this topic but the info was quite scattered and not very helpful

Ive got my fuel pump already and now need to know what the most common upgrade for fuel rail, injectors and fuel reg if i need one :D

So if you can post your fuel system upgrades and or any other info on this topic that would be awesome :P

Cheers :down:

I don't know anything about the stock system for GTT but I can tell you that a stock

GTR R34 fuel pump driven directly from the battery voltage (or rather, from the alternator),

is more than capable of maintaining pressure & flow on the stock fuel rail and thru the stock

fuel piping, with an aftermarket fuel pressure regulator, to at least 380kw worth of fuel

facing 1.8bar in the plenum. At least, that is what mine did/does.

that is the stock R34 pump, not even the nismo pump or

any of the commonly mentioned in-tank pump upgrades, let alone external pump setups.

injectors are a whole other thing.

I don't know anything about the stock system for GTT but I can tell you that a stock

GTR R34 fuel pump driven directly from the battery voltage (or rather, from the alternator),

is more than capable of maintaining pressure & flow on the stock fuel rail and thru the stock

fuel piping, with an aftermarket fuel pressure regulator, to at least 380kw worth of fuel

facing 1.8bar in the plenum. At least, that is what mine did/does.

that is the stock R34 pump, not even the nismo pump or

any of the commonly mentioned in-tank pump upgrades, let alone external pump setups.

injectors are a whole other thing.

Well im useing turbosmart fuel reg, siemens 550cc injectors which are a straight fit and no custom fuel rail needed etc. But I believe I have herd the standard fuel reg is fine for those power figures... I may be wrong.

Well im useing turbosmart fuel reg, siemens 550cc injectors which are a straight fit and no custom fuel rail needed etc. But I believe I have herd the standard fuel reg is fine for those power figures... I may be wrong.

it is obvious if the pump is run off a voltage regulator (fuel pump reg) and pump can't maintain pressure..

as the boost climbs at some point the pump draws too much current and the voltage regulator

(if there is one) browns out, and the fuel pressure in the rail falls off a cliff.

and yeah I think the standard fuel regulator is fine, just an adjustable one gives

the tuner more options.

All you need is

1. Injectors - around the 550cc mark are more than enough

2. Fuel pump, wired correctly. (FI Guide has information)

That's it. Anything else is wasted money.

I made 370rwkw on stock fuel reg, stock rail - as have 30-40 other people i know RB25/RB26 etc etc.

Well im useing turbosmart fuel reg, siemens 550cc injectors which are a straight fit and no custom fuel rail needed etc. But I believe I have herd the standard fuel reg is fine for those power figures... I may be wrong.

Awesome, The less stuff i have to replace the better.

Thanks allot Sam :down:

All you need is

1. Injectors - around the 550cc mark are more than enough

2. Fuel pump, wired correctly. (FI Guide has information)

That's it. Anything else is wasted money.

I made 370rwkw on stock fuel reg, stock rail - as have 30-40 other people i know RB25/RB26 etc etc.

Even better thanks man

Ive got the fuel pump in already so it looks like i just need injectors.

Wooooo

I have a set of siemens 660cc injectors for mine, i'll let you know once my turbo goes on. these cost me $450 for the set as there to suit the XR6 Turbo's so you just need to change injector plugs over to match.

Do you know how much it is to change the injector plugs?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Sorry to hear your HFM BM57 was faulty,  did you contact HFM I would hope they would be at least grateful for the information if there was some sort of manufacturing fault, you would hope they would be sympathetic even if your item was 2 years old if it had never been fitted. May I ask where it leaked from ?
    • Cats are called Bella, and Donna...  Like that poisonous plant And I remember your 2 monsters, I remember making a little bit of wee when you let them out... LOL I have already installed cat doors into the laundry where their kitty litter is, and the sun room, apart from the cat doors there's not going to be any permanent mounted stuff on the interior walls (interior doors are cheap and easy to replace) I will get a outdoor cat cage thingie once I finish the landscaping out back... https://catnip.com.au/ The only off limit areas are the main bedroom and the gym room....but, currently the cats are curled up in bed, in the main bedroom with the Mrs.....LOL, the off limits for the kittens to the main bedroom lasted about 5 minutes with Jackie I currently only have 1 free standing huge cat tree multiple level scratching post thingie in the lounge room, but, I will be getting another one soon now that I'm happy with the furniture layout in the back room and have a perfect spot for it  
    • All of this is making it seem clear that running the Coppermix twin was definitely the way to go, especially in hindsight with how insane tariffs have gotten and the strength of the USD vs yen at the time.
    • That sounds like no chance of even importing one for road registering then Now I see why Duncan wants to check LHD rules for Targa...   I wonder how "bolt in" the AWD would be if you got one imported from the US and swapped it to an AUD one
    • Not to mention they drive like a bucket of bolts! yuck!
×
×
  • Create New...