Jump to content
SAU Community

At Wat Power Level Do U Start Running Into Problems With The Standard Rb26 Fuel Rail


Recommended Posts

i had my car on the dyno for a tune yesterday and when we got to 400kw it started running into problems with fuel

we had a fuel pressure + flow gauge connect to the car while we were tuning the flow doesnt drop at all but the fuel pressure goes from 40psi to 60psi and then just drops back down to 40 instead of going higher it just drops back to 40 and the car leans out so we neva got to finish the tuning

fuel system is pretty basic

bosch 023 (rated at 700hp) mounted intake

SARD 800cc injectors

HKS fuel reg

well pressure dropping is usually an indictor of pump running out of puff, or faulty fuel regulator, not restrictive fuel rail. are you sure the fuel flow wasn't affected at all by pressure change? where were you measuring the flow, and how?

dirty fuel filter?

its got a brand new fuel filter already on it

well pressure dropping is usually an indictor of pump running out of puff, or faulty fuel regulator, not restrictive fuel rail. are you sure the fuel flow wasn't affected at all by pressure change? where were you measuring the flow, and how?

it cant be a fuel reg because at 1st we thought it was a faulty fuel reg and replaced my SARD fuel reg with a HKS one and it changed nothing

the fuel gauge we have is the blue one

the gauge is used to measure fuel pressure the it has a ball which moves up and down to show u how much fuel flow u have

isnt the 023 rated less then a 044?

could be upgrade time

the 044 is rated at 600hp

the 023 is rated at 700hp

if you are running stock wiring to your fuel pump then that will be part of your issue kemp

we have already wired the fuel pump so it gets full voltage

are you sure the 023 is rated higher than a 044? From what info i could find the 023 is rated at 163L/H @ 5bar vs. the 044 rated at 200L/H @ 5bar.

The HP ratings on pumps vary by 300hp depending on where you buy them, the L/H don't.

Who has actually found the limits of the stock fuel rail?

I know its not the answer to your question but i had just on 400 KW at the treads on a stock rail and Nismo regulator.

I know its not the answer to your question but i had just on 400 KW at the treads on a stock rail and Nismo regulator.

Cool thanks

Would be good to know at what point it gives up for future reference and anyone doing a search will no doubt read this thread and hope to find the answer

at 400 rwkws i would be starting to think about 2 044 to give you some room to play.

as i mentioned earlier 1 x 023 would be simply running out of legs.

Why?

I run a surge/external in mine and i drive it daily. I cant say its that much louder at all if the pump is mounted decently

i realli dont want to go threw all the trouble of fitting a surge tank and all the lines im after some thing i can just bolt in and fit the problem

i wanna get out of this the most cheapest way i can as well

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

    • Pads for R32 GTS-t, R32 GT-R non V-Spec (Sumitomo), R33 GTS-t and R34 GT-t are all interchangeable. R34 GT uses a 2x piston caliper, hence it didn't fit.
    • Checked with amayama and nope, the full S2 manual set is not available anymore. Unsurprising, but still disappointing as the ? on availability gave a glimmer of hope.
    • I've heard the Tomei USA head gaskets are decent if you want to o-ring the heads but otherwise not recommended.
    • The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
×
×
  • Create New...