Jump to content
SAU Community

Rb26 Plenum Options For Twin Fuel Rails

N1GTR

By N1GTR,
in Engines & Forced Induction

 Share

Recommended Posts

N1GTR Grand Master

N1GTR

Posted
  • Author
Posted

I spose it depends on how your tuner tunes.

I get tuned by the same guy as Steveo, running ID 2000's and i'm sitting at 71% DC to make 430 RWKW. Too rich? Possibly? Do we care? Not in the slightest.

Bumping up the pressure might be a way around this, but then you stress the pumps more.

:yes:

N1GTR Grand Master

N1GTR

Posted
  • Author
Posted

Why not just run a Greddy plenum? They have a loyal following with the drag GTR fraternity in Aus/Japan and NZ so you cant go too far wrong with one

I was hoping for something other than Japanese :)

Looks like adding the bungs to the stock plenum will be perfect, so I'll do that.

N1GTR Grand Master

N1GTR

Posted
  • Author
Posted

Only 40-odd rwkw increase with doubling of injector size?? Need an estimate of DC, at least, Steve as they should handle anything any pair of low mounts can throw a them.

700 to 1000......that's not double ;)

I dont like to guess things - thats for idiots to do who dont try things for themselves and just believe whats written on the internet. Im dealing with the fact, so when i'm out there next i'll find the exact number. Not that it matters for this thread mate - i'll post results when it's all finished, nothing until it's all done though. :)

Edit; This is all for a new engine I've got, and yeah without sounding like a prick, it's pretty clear that what applies to a normal 2.6L RB doesnt apply to this one - and I'm getting pretty keen to drive it. I know you know that feeling as well as I do!

N1GTR Grand Master

N1GTR

Posted
  • Author
Posted

Could it be the fuel pumps aren't enough? You guys are still on standard 5/16" fuel lines yeah? I could be not enough fuel getting to the rail so needs a heap of duty to compensate?

2 x 044's feeding through their own lines to twin entry rails. So two lines up and one return. Fuel pressure throughout the dyno sessions are logged and nothing's wrong there. Maybe in the future it "could" be an issue with the different fuels (not using just E85 and pump 98) i'll be trying on it so it's a wait and see kind of thing. That said, if fuel pressure is low, the ECU has provisions for that anyway.

N1GTR Grand Master

N1GTR

Posted
  • Author
Posted

Thanks for the help guys, I'll close this now as there's nothing really left to talk about before this gets into a "my tuner says" "his tuner says" kind of thing regarding DC and as mentioned, I don't care about fuel usage :)

Cheers

-Steve

Guest
This topic is now closed to further replies.
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      What accelerator cable can be used with greddy plenum

      By Duncan · Posted

      I was 99% sure the standard one is long enough to get there, you might just have to change the throttle orientation. If not, I remember someone having used an r31 cable instead, but that is probably harder to find than r33 by now...
    • V36
      What accelerator cable can be used with greddy plenum

      By V36 · Posted

      HELP   Hey all, Is there an accelerator cable from another Nissan that can be used on the R33 GTST RB25DET with a Greddy forward facing plenum?  Thanks in advance  Rob 
    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      Or do we think it was installed to give 1 bar of boost max, all day, everyday?
    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      So could it be assumed it has been installed intentionally with potentially a power FC boost controller kit? 
    • Gareth87
      What should I do next to hold the head on

      By Gareth87 · Posted

      Had my rig on Matt's dyno at PITS the other day. After a few years between tunes I added a few sensors and swapped intercoolers. Result. 553hp at 26psi. Not bad for an FJ20 that was built in 2007. The problem.. It filled the overflow bottle on hard runs which leads me to believe the head gasket isn't sealing. I have a coolant pressure sensor which was reading cap pressure at 22psi and occasionally overrunning to 23/24 psi on deceleration after a pull. It was not spiking. It has arp2000 head studs and a cometic gasket. As its been 18 years in service, I pulled the engine out and head off. Everything looks good but we obviously have an issue. Where I'm at.. Years ago I had the same issue, I checked the stud tension and they were all over the place. Some at 60 to 70 and some up near 90. I nipped them all to 100ft lbs and this stopped the water push until now. I believe this compromised the gasket back then. What do I do? 2 options are..  1) I bought arp 625+s, which I could put in with a new gasket. Thinking Kameari this time, reassemble and try again. 2) strip the block, get fire rings machined in with copper gasket and try that. I do not want to push it more than 28 to 30psi. I think the turbo will be out by then anyway. (G30-770). My other concern is the long term ability of a copper head gasket. Are they streetable for years? I feel like a new gasket with the new studs will probably suffice, but I don't know. Any thoughts welcome and advice on copper gaskets and fire rings. Thanks!
×
×
  • Create New...