Jump to content
SAU Community

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

STR8E180

By STR8E180,
in Engines & Forced Induction

 Share

Recommended Posts

STR8E180 Proficient

STR8E180

Posted
Posted

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

Beer Baron Grand Master

Beer Baron

Posted
Posted

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?

STR8E180 Proficient

STR8E180

Posted
  • Author
Posted
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

TiTAN Grand Master

TiTAN

Posted
Posted

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.

Piggaz Grand Master

Piggaz

Posted
Posted
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.

N1GTR Grand Master

N1GTR

Posted
Posted
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

dangerman4 Mentor

dangerman4

Posted
Posted

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.

STR8E180 Proficient

STR8E180

Posted
  • Author
Posted
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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      Jacks that fit under GTR lips that can reach the subframe?

      By Kinkstaah · Posted

      I used to do that (sills with rubber jack block).. ... then I got side skirts, and there's no way for the jack to actually work there, the jack pad itself on the jack is too big. Is the answer to use a... smaller (?) jack? Hmmm.
    • Murray_Calavera
      Jacks that fit under GTR lips that can reach the subframe?

      By Murray_Calavera · Posted

      I have too much trauma from every skyline I've ever seen having crushed jack points/pinch welds lol.    Yep, works 100%, it's what I use when I'm using the quick jack. Don't know why I can't also bring myself to do the same thing when I'm using a jack. I blame the skyline PTSD. 
    • GTSBoy
      Jacks that fit under GTR lips that can reach the subframe?

      By GTSBoy · Posted

      The pinchweld is fine, even with a trolley jack, so long as you're not actually pushing on the pinchweld itself. More to the point, we shouldn't talk about lifting or supporting on the pinchweld, we should talk about using the sill "jacking points", which just happen to be adjacent to the pinchweld. I just have dense rubber blocks with grooves in them for each of the chassis stands and the trolley jack, that I use at the sill jacking points if/when I have to lift/support there. They put all the load onto the steel pad of the jacking point and not the pinchweld. As intended.
    • Murray_Calavera
      Jacks that fit under GTR lips that can reach the subframe?

      By Murray_Calavera · Posted

      Makes sense.  I would do something different if I felt like there was a better option. Generally the only other area I'm happy to jack on is where I want to put the stand. The pinch weld is not an option for me for either the jack or stands, so very limited options overall.  Plus never having had an issue with doing this, has kinda reinforced in my mind that it's fine. I'd do it on any car without a second thought these days lol. 
    • joshuaho96
      Jacks that fit under GTR lips that can reach the subframe?

      By joshuaho96 · Posted

      I know on some cars it's explicitly endorsed in the service manual but a lot of them it isn't which is what gives me pause. I know a lot of cars also have you jack up the car by the radiator core support which is a lot easier to get to than some crazy deep section of the front subframe. I'm just reluctant to find out if any of that is really safe to do if not listed in the service manual. The FK8 has even the R-chassis beat in this regard, the front subframe jack point is almost fully behind the front tires and is surprisingly recessed into the car.
×
×
  • Create New...