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    • N55 breaks into the 10's direct injection only - F30 335i xDrive with Pure Stage 2 and XDI-HPFP-60 runs 10.9@124

      You saw many S55's break into the 10's direct injection only but never an N55 despite being on the market much longer. Well, it finally happened and the N55 is in the 10's without any methanol or port injection assistance.


      You can thank Xtreme-DI and their XDI-HPFP-60 high pressure fuel pump for making this happen:


      All wheel drive traction is clearly helping based on the trap speed. The 1.6X 60 foot is not too shabby and the automatic TCU features xHP software.

      The car is of course also running a Pure Stage 2 N55 hybrid turbocharger and is tuned on E85.

      XDI continues to show it is at the forefront of aftermarket direct injection upgrades.


      This article was originally published in forum thread: N55 breaks into the 10's direct injection only - F30 335i xDrive with Pure Stage 2 and XDI-HPFP-60 runs 10.9@124 started by Sticky View original post
      Comments 4 Comments
      1. CobraMarty's Avatar
        CobraMarty -
        Nice, now that's what I'm talking about.
      1. F87Source's Avatar
        F87Source -
        Dang this is awesome!

        I remember a time when there was so much skepticism regarding this HPFP upgrade about how it was impossible and likely to be a dud since so much engineering money was already put into trying to develop the product before etc. But looks like XDI is the real deal and proved all of the doubters wrong.
      1. maxnix's Avatar
        maxnix -
        E85 is impressive for its lack of energy density. It would be interesting to see the logs of the run.

        I wonder what it would do on 93 pump octane.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by maxnix Click here to enlarge
        E85 is impressive for its lack of energy density. It would be interesting to see the logs of the run.

        I wonder what it would do on 93 pump octane.
        Well ironically its the lack of energy density that makes it impressive.

        The hydrocarbon content (energy) is higher in gasoline because in the ethanol molecule part of those hyrdocarbons are replaced with oxygen.

        Oxygenates are what are added to gasoline to increase the octane rating and resistance to knock.

        So ethanol naturally has knock resistance and higher octane built in at the sacrifice of energy density.

        https://extension.psu.edu/fuel-ethanol-hero-or-villain