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    • BoostAddict working with XDI on Porsche 991.2 9A2B6 3.0 HPFP (high pressure fuel pump) upgrades for full E85 tuning

      You may recall where we last left off with our Project 991.2 Carrera it was making more power than anyone else in the world at 668 rear wheel horsepower. The problem? It was making that power on race gas and E85 taxed the fuel system.


      Running race gas everyday is not really feasible for a daily driver. E85 on the other hand absolutely is.

      I want the car tuned on E85 and able to run pump E85. In comes Uwe at XDI (Xtreme-DI) to the rescue.

      The fuel pump is part number 9A2-110-315-01 (part number 15 in the above illustration) and applies to these models:


      XDI believes increasing capacity will not be a problem:

      [Thatís the Bosch HDP5evo (same basic pump internals like BMW B58).
      My little 35-pump will be a 25-30% upgrade in capacity.
      My big 60-pump would give you 55-60% more capacity.
      Right now we will be testing the XDI-35 pumps and seeing how far they will let us go on full E85.

      If all goes well, expect the 991.2 (and probably 992 models) to have a plug and play fuel system upgrade solution for the factory direct injection system.

      This article was originally published in forum thread: BoostAddict working with XDI on Porsche 991.2 9A2B6 3.0 HPFP (high pressure fuel pump) upgrades for full E85 tuning started by Sticky View original post
      Comments 24 Comments
      1. richpike's Avatar
        richpike -
        This is awesome. Excited to see the results!

        -Rich
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by richpike Click here to enlarge
        This is awesome. Excited to see the results!

        -Rich
        If I can run E85 on the street that will be a game changer. Just need one other part from @3DMetal when he has time and we may be able to show the platform can do ~700 whp on E85 with DI on the factory PDK and engine internals.

        911 turbo what?
      1. Rithvhin88's Avatar
        Rithvhin88 -
        Sounds awesome Joe
      1. Rithvhin88's Avatar
        Rithvhin88 -
        It doesn’t seem a port injector spacer system would be that hard to adapt. And if 992 turbo uses this engine is there any hope the crank is strong as heck and new rods wrist pins and pistons could be made, while at same time changing stroke to increase displacement. Carillos 991TT rods, wrist pins and pistons don’t break the bank.
      1. quattr0's Avatar
        quattr0 -
        Great news! I was quoted 25k (turbos, exhaust, modified fuel pump, headers, etc., the whole package) running straight e85 and making est. 800bhp. There's one car in development.

        Thank you for doing this, Joe.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Rithvhin88 Click here to enlarge
        It doesn’t seem a port injector spacer system would be that hard to adapt.
        No, SRM has a solution actually. I'm just going to try going through the factory DI first before adding port injection.

        Click here to enlarge Originally Posted by Rithvhin88 Click here to enlarge
        And if 992 turbo uses this engine is there any hope the crank is strong as heck and new rods wrist pins and pistons could be made, while at same time changing stroke to increase displacement.
        It's actually the bore that provides the increase in displacement, not stroke. That means literally every 991.2 or 992 3.0 can reach the same displacement as the 992 Turbo.

        If you increase the stroke to 81.5 mm you get 4.0 liters like in the 718 GT4 and Spyder.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        Great news! I was quoted 25k (turbos, exhaust, modified fuel pump, headers, etc., the whole package) running straight e85 and making est. 800bhp. There's one car in development.
        Heh who is that? We're doing 800+ bhp now for a whole lot less...

        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        Thank you for doing this, Joe.
        It was the goal all along!
      1. Payam@BMS's Avatar
        Payam@BMS -
        So your limit is the HPFP, then next is the DI injectors.. What if the DI injectors max out at only another 50 whp over stock HPFP. Might be wasting time, IMO.
      1. quattr0's Avatar
        quattr0 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Heh who is that? We're doing 800+ bhp now for a whole lot less...
        I think he told me 800whp, not crank but I don't want to just throw it out there. I guess will know more once the car in development will be ready. They've been at it for weeks, if not months.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        So your limit is the HPFP, then next is the DI injectors.. What if the DI injectors max out at only another 50 whp over stock HPFP. Might be wasting time, IMO.
        One problem at a time
      1. Rithvhin88's Avatar
        Rithvhin88 -
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        So your limit is the HPFP, then next is the DI injectors.. What if the DI injectors max out at only another 50 whp over stock HPFP. Might be wasting time, IMO.
        I agree from what Iíve heard the spray pattern of DI has a limit before it starts washing down the cylinder walls and causing issues. The Turbo fuel limit is known to be about 700awhp. Meth is a common route but is horrible for your car and not safe. Arenít Macís from the factory with both DI and Port injectors?
      1. 12 TURBO's Avatar
        12 TURBO -
        [QUOTE=Sticky;836792]Heh who is that? We're doing 800+ bhp now for a whole lot less...



        Is there any 1/4 mile or 60-130 info for your " 800+ bhp now for a whole lot less..."
      1. nbrigdan's Avatar
        nbrigdan -
        [QUOTE=12 TURBO;836825]
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Heh who is that? We're doing 800+ bhp now for a whole lot less...



        Is there any 1/4 mile or 60-130 info for your " 800+ bhp now for a whole lot less..."
        I mean ya... its his car there's a good amount of data out there @Sticky

        Also, quotes appear to be a little busted.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Rithvhin88 Click here to enlarge
        The Turbo fuel limit is known to be about 700awhp.
        On the factory pumps which are a different design than the 9A2B6.

        Click here to enlarge Originally Posted by Rithvhin88 Click here to enlarge
        Aren’t Mac’s from the factory with both DI and Port injectors?
        No, they are port injected. The VAG motors with dual-injection off the top of my head are the Audi 2.5 TFSI, Lambo 5.2 V10, and W12.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 12 TURBO Click here to enlarge
        Is there any 1/4 mile or 60-130 info for your " 800+ bhp now for a whole lot less..."
        Not sure why you put it in quote as the graph is posted proving the output. Nobody is else is close last I checked.

        The article states we need to install the pumps and tune. Shops are closed right now. No further data coming until everything is back up and open for business.
      1. 12 TURBO's Avatar
        12 TURBO -
        Click here to enlarge Originally Posted by Sticky;8368o50
        Not sure why you put it in quote as the graph is posted proving the output. Nobody is else is close last I checked.

        The article states we need to install the pumps and tune. Shops are closed right now. No further data coming until everything is back up and open for business.
        I was not meaning to question your posted dyno results or any thing else about your efforts on this project. My question was aimed at what your car could do on the road using the 668 RWHP such as 60-130 and or 1/4 mile times. The comparison you make to the GT2RS makes it easy to believe your cars should accelerate as well if not slightly better than the GT2RS.
      1. subaru335i's Avatar
        subaru335i -
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        So your limit is the HPFP, then next is the DI injectors.. What if the DI injectors max out at only another 50 whp over stock HPFP. Might be wasting time, IMO.
        Why would you assume the DI injectors would be the bottleneck? Is the 991 Turbo hamstrung by the DI injectors?
      1. Payam@BMS's Avatar
        Payam@BMS -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Why would you assume the DI injectors would be the bottleneck? Is the 991 Turbo hamstrung by the DI injectors?
        Yes.
      1. subaru335i's Avatar
        subaru335i -
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        Yes.
        Oh I didn't realize this, what is the power limit? Are all of these 900+whp 991's using Meth or supplemental port injection then?
      1. Payam@BMS's Avatar
        Payam@BMS -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Oh I didn't realize this, what is the power limit? Are all of these 900+whp 991's using Meth or supplemental port injection then?
        It was about 550whp on full e85. Correct, methanol or port injection.