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    • XDI (Xtreme-DI) developing two upgraded HPFP pumps claiming 35% & 60% increases in flow for the F-Series N55 and F80 M3/ F82 M4 S55 motors

      We all know that direct injection fuel systems in the modern BMW turbo era become a bottleneck eventually when making big power. The holy grail has been an upgraded HPFP (High Pressure Fuel Pump) that can flow big numbers over the factory supplied pump.


      XDI claims to have two HPFP pumps that do just that.

      The first is XDI-HPFP-35 with a claimed 35% increase:

      The XDI-HPFP-35 is the first High Flow High Pressure Direct Injection pump to replace Bosch, Denso, Magneti Marelli and Delphi pumps.

      It is capable of up to 200bar / 2900psi injection pressure.
      It flows up to 35% more when mounted on the same cam lobe.
      The second is the XDI-HPFP-60 with a claimed 60% increase:

      The XDI-HPFP-60 is the bigger brother of the XDI-HPFP-35. Since it was designed based on the same flexibility criteria as the XDI-HPFP-35, it can be mounted on almost all the same engines.

      It is capable of up to 240bar / 3500psi injection pressure.
      It flows up to 60% more when mounted on the same cam lobe.
      Now, that all sounds fantastic. The problem? There is no proof. There is no pricing. To be fair, the BMW application is said to be in development still.

      All we know now is that they state these pumps apply to the F-Series N55 as well as the F80 M3 and F82 M4 S55 motor.

      If they work as advertised, they are worth whatever XDI charges. It almost sounds too good to be true but hopefully some independent results are posted with these pumps that verify the claims and M3/M4 owners have a plug and play HPFP upgrade solution.

      This article was originally published in forum thread: XDI (Xtreme-DI) developing two upgraded HPFP pumps claiming 35% & 60% increases in flow for the F-Series N55 and F80 M3/ F82 M4 S55 motors started by Sticky View original post
      Comments 10 Comments
      1. Zel335's Avatar
        Zel335 -
        Would be interesting if this is true. Should be a lot less of a headache to control with the ECU just taking care of it.
      1. jcolley's Avatar
        jcolley -
        Uwe Ostmann (owner of XDI) was a former F1 combustion analyst. They produce an incredible combustion analyzer system (in cylinder pressure transducers) that's on my shortlist of must-haves. Very friendly guy and exceptionally knowledgable.

        I'm sure results and data will be forthcoming. Here's some of their work from their youtube: https://www.youtube.com/channel/UCk1...0Ea5h9riZOQrig
      1. BPCMotorsports's Avatar
        BPCMotorsports -
        patiently waiting...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by jcolley Click here to enlarge
        Uwe Ostmann (owner of XDI) was a former F1 combustion analyst. They produce an incredible combustion analyzer system (in cylinder pressure transducers) that's on my shortlist of must-haves. Very friendly guy and exceptionally knowledgable.
        You convinced me. If anyone can pull it off it is him.
      1. berns's Avatar
        berns -
        And if he can pull it off for the S55, why not the N54? Promising...
      1. Weehe's Avatar
        Weehe -
        Click here to enlarge Originally Posted by berns Click here to enlarge
        And if he can pull it off for the S55, why not the N54? Promising...
        Very different HPFP style.
      1. F87Source's Avatar
        F87Source -
        +1
        I wonder if they can make a conversion to fit these pumps on the N54.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by berns Click here to enlarge
        And if he can pull it off for the S55, why not the N54? Promising...
        This was discussed in an N54 thread actually.

        The ECU design on the N55 being basically the same as the S55 makes this far more seamless.
      1. BMWJunkie's Avatar
        BMWJunkie -
        I knew I held onto that n55 vac pump for a reason Click here to enlarge
      1. RobNyc's Avatar
        RobNyc -
        Patiently waiting