How Much Power Are You Pushing On NNBS FlexFuel Injectors

Discussion in 'Performance' started by Slow05CC, Mar 23, 2016.

  1. Slow05CC

    Slow05CC Avery@texas-speed.com

    Messages:
    168
    I recently purchased a set of the FlexFuel Injectors PT#12580426 which I have read are about 36 pounders?

    I ordered the Racetronix EV1 Mini Delphi to EV6 USCAR adapters and plan on putting them in this weekend and getting a retune done.

    I know these injectors are more then I will need at the moment but wondering what kind of power they will support?

    Mods Include: LM7 + 220r cam + TBSS intake + Bolt Ons... Future plans Include a 5.3 Block with 4.8 Pistons ( which I am in the process of building ) + Milled 243/799 heads ( .020 or .030 ) + Aggressive Custom Cam, along with all the bolt ons, and full exhaust, ect.

    Thanks
     
  2. 2005_Silverado

    2005_Silverado Banned

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    4,647
    theyll handle that just fine
     
  3. Jared

    Jared Administrator Staff Member

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    20,561
    I read that there were two types, 33lb for return, and 36 for returnless
     
  4. Jared

    Jared Administrator Staff Member

    Messages:
    20,561
    these are returnless injectors so 36, I don't think you will have a problem with these. Not unless you are planning something down the line, and then what kind of mods/power?

    found this too, hard to find much info on them
    Flow rate: 384cc/min at 3BAR, 36lbs/hr at 43.5PSI
     
    Last edited: Mar 23, 2016
  5. Khaos

    Khaos Bed Dent Club Founder

    Messages:
    20,333
    Good thread, because I had similar questions. I have a set of the same injectors sitting at home.

    From what I've read, they should hold up to the 400rwhp mark, or around there. Depends on rpm too and where they fall off.
     
  6. 2005_Silverado

    2005_Silverado Banned

    Messages:
    4,647
    fuel pressure will also play a role on how much they can handle....same injector can be higher or lower rate with diff pumps. I personally run 12613411 and BBP said they were nowhere near being maxed out and Ive got pretty much same mods youre planning on doing.
     
  7. Khaos

    Khaos Bed Dent Club Founder

    Messages:
    20,333
    Are those the stock tbss injectors?
     
  8. 2005_Silverado

    2005_Silverado Banned

    Messages:
    4,647
    09+ NNBS injectorizorz
     
  9. Slow05CC

    Slow05CC Avery@texas-speed.com

    Messages:
    168
    wow! Thanks for the input and responses!

    Other plans down the road may include stepping up the NA game but I don't think I'd ever see 400 wheel with a naturally aspirated 5.3! Maybe some day I built a six oh but that won't be for a while. All this goes into a crew cab NBS, it's not a racetrack by any means and I don't need or want it to run 12s! But I do want it to be fun and hang with these pesky new technology trucks, imports, and be able to run domestic v8 cars and not be totally blown out of the water!

    As it sits, it's fun, but I wouldn't argues with more power hah. So that is why I got these injectors! Hoping my flat top 5.3 build with 243s makes 400 at the crank, however is be content with more
     
  10. jay_dawg05

    jay_dawg05 New Member

    Messages:
    1
    Did your stock injectors fit on the nnbs intake? I did mine but came with the injectors and fuel rails and I used a xlink and adapters for the injectors


    Sent from my iPhone using Tapatalk
     
  11. Slow05CC

    Slow05CC Avery@texas-speed.com

    Messages:
    168
    I have NNBS FF Injectors. I have heard that the NBS injectors will fit, but I cannot confirm that. I guess I could try if I really wanted to know. I have several sets of LM7 injectors laying around
     

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