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    • 100% E85 on the N54 with upgraded turbos? Yep. Introducing the Vargas Turbo Technology 'Shotgun' HPFP pump upgrade and a new stock frame horsepower record

      Vargas Turbocharger Technologies has achieved what many said was impossible. The N54 community no longer has to weep over fueling woes as a real HPFP upgrade is finally here. Vargas Turbo Tech delivered on their promise and has forged into new territory on the N54 platform. 100% E85 on upgraded turbos is now possible thanks to the 'Shotgun' HPFP upgrade and the N54 is loving it. The result with the HPFP upgrade from VTT is a new stock frame turbo record at 558 wheel horsepower as the motor finally gets all the E85 it needs.

      Keep in mind that this is on the stock head and surpasses results from N54's with upgraded stock frame turbochargers and ported heads. That says quite a bit as to the fueling capability of the system.

      Vargas did extensive testing and BimmerBoost was privy to the updates throughout the process. This took months to come about and VTT wanted to make sure everything was absolutely perfect, which it is. Not to mention the extensive presentation and data that should satisfy even the most skeptical. BimmerBoost wanted to make sure everything was perfect as well and watching the process unfold was an absolute pleasure thanks to quality communication especially once the logs showing the fuel pressure were seen showing the capability of the upgrade.

      There are two variations of the kit and Tony at Vargas Turbo Tech explains the options and data best himself below. Congratulations to Vargas for doing what many stated could not be done and for finally providing a proper fuel solution that does not involve the car having to bathe in methanol. Pictures, datalogs, and pricing are all below.


      We are happy to announce the VTT "Shotgun" HPFP upgrade kits for the N54 platform. This kit has been a long time in the making and after almost 3 months of daily testing we are finally happy with its consistency / reliability, and are ready to announce the product. We took the car to the dyno on Thursday to provide some numbers as well as logs to go along with those numbers so you can see the pronounced effect E85 can have on these engines. The results were nothing less than shocking and I think you will agree this upgrade is really going to open up the platform.

      So letís start out with the product descriptions and details. We are going to have 2 variations of the kit one for people on stock frames making anywhere from 400-550WHP, then one for people on stage 3 or single style turbos for 550whp+.

      Product Description:

      The first option is our "Single Barrel" kit; this kit is basically a HPFP relocation and overdrive kit. You take your existing HPFP, remove it, and using our mounting system, mount it in the accessory cluster to be driven by the belt. This allows the pump to be over driven, coupled with our new feed line, and rail modification this provides enough fuel for around 550WHP on 100% E85, with blends it can support even higher. We went through numerous pulley designs to find the optimum overdrive speed; too fast it would actually hurt fuel flow, and too slow would also hurt fuel flow.

      Included in the "Single Barrel" kit:

      - VTT Billet HPFP drive housing
      - VTT Billet Stainless Steel drive shaft (pre-assembled in housing)
      - High speed German ball bearings rated at 17,000RPM (pre-assembled in housing)
      - VTT Billet HPFP pulley
      - VTT HPFP housing mounting bracket
      - VTT Billet stock location HPFP block off plate
      - VTT High Pressure feed line
      - VTT Low Pressure feed adaptor
      - VTT "Single Barrel" modified fuel rail (core charge applies)
      - Water line modification parts
      - Serpentine belt
      - Plug and Play wiring harness
      - All hardware required for assembly

      Tentative pricing for the "Single Barrel" kit is $1099-$1299

      Next we move on to our "Double Barrel" kit. Our Double barrel kit adds a second HPFP to your existing HPFP system. Using the same mounting system as our "Single Barrel" Kit, you now leave your stock HPFP in place and mount an additional pump on the accessory drive, then using our custom high / low pressure feed lines, modified fuel rail, and activation system, the second pump is now run on demand, and that demand can be user adjusted for activation point, and fuel added.

      Included in the "Double Barrel" Kit:

      - VTT Billet HPFP drive housing
      - VTT Billet Stainless Steel drive shaft (pre-assembled in housing)
      - High speed German ball bearings rated at 17,000RPM (pre-assembled in housing)
      - VTT Billet HPFP pulley
      - VTT HPFP housing mounting bracket
      - VTT High Pressure feed lines with all fittings
      - VTT High Pressure check valve with pre-assembled high pressure fittings
      - VTT Low Pressure feed lines
      - VTT LPFP pre-assembled "Y" fitting adaptor and lines
      - VTT "Double Barrel" modified fuel rail (core charge applies)
      - Water line modification parts
      - Serpentine belt
      - VTT HPFP activation system
      - Plug and play wiring harness for pumps
      - Wiring harness for activation system
      - All hardware required for assembly

      Tentative pricing for the "Double Barrel" kit is $1499-$1699 (without new pump) $1799-$1999 (with new pump)

      Installation:

      I am sure everyone is curious how hard the kit is to install, what has to be modified etc., we did our best to keep the kit very passive meaning it would be easy to return your vehicle back to stock with little effort, in order to mount the pump in the new location, you have to modify one water line, and bend an AC line out of the way, thatís all the modifications required everything else is bolt on, or off. If you choose to go back to stock at any point, you can purchase the modified water line from BMW and replace it.

      For the "Single Barrel" kit, installation requires intake manifold removal, stock HPFP removal, stock high pressure feed line removal, installing HPFP block off plate, unbolting and rerouting the LPFP line to where the pump will now run, plugging in the plug extension, reinstalling intake manifold, remove charge pipe, remove cooling fan, unbolt 2 bolts from drivers side motor mount, jack up driver side of motor to allow easier access to AC compressor, remove 3 bolts holding AC compressor, install mounting bracket in place over the AC compressor and install new bolts securing in place, follow supplied instructions to modify water line to clear pulley, lower motor back down install bolts, install HPFP to housing, reroute LPFP feed to HPFP and connect, install new belt on system, reinstall fan, remove stock fuel rail, install modified rail, install high pressure feed line from HPFP to rail, reinstall charge pipe, reinstall intake, purge system, and start vehicle. I can install the system in under 2 hours, but I have done it many times, for a first time I would suggest 4 hours for a shop, 5-6 hours for a person at home.

      For the "Double Barrel" system Same as above, except stock pump stays in place, another high pressure feed line, high pressure check valve, and another high pressure connection to the rail, as well as different LPFP routing, and a little more wiring. I would say ďDouble Barrel" 4-5 hours for a shop 6-7 for a someone trying at home.




      Letís get into some of the testing and numbers

      Testing:

      We have done extensive testing over the past 3 months, and during this time have learned quite a bit about the HPFP system.

      We will start with some logs on 100% E85 and the completely stock HPFP system in place EXCEPT we did use a modified fuel rail as it was all we had ( spoiler alert, it didnít matter), this was done with a brand new HPFP installed just for these tests.

      The first one is OTS HPFP Req and OTS AFR levels on a mild tune we used for most of our testing, you can see the HPFP just nose dives almost instantly when trying to make these runs on 100% E85 even on a mild tune

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...12&zoom=79-138


      Next one is same tune, just 2500 Req and leaner AFR levels, some people have pushed the theory that asking the DME to request more HPFP pressure will help the HPFP deliver more fuel, this not the case, and you are just putting unneeded strain on the HPFP system for no gains, you always want to run as little HPFP as possible to provide the fuel you need as the higher the pressure the more strain you are putting on the entire system

      Datazap log:http://www.datazap.me/u/vtt-shotgun-...2&zoom=142-276


      Next one is same tune with 2500 Req and OTS fuel, again same thing HPFP just nose dives instantly

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...12&zoom=49-107


      Ok now we have a "Single Barrel" log on 100% E85 a MUCH more aggressive tune (itís actually the same tune we made 523WHP / 541WTQ on) You can see the HPFP holds almost perfectly the entire time except that small blip at low RPM. This log is also a 3-4 shift wot almost to redline in 4th for maximun load and fueling needs, you can see the whole log in the link below to see how the "Single Barrel" does on the shift

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...15&zoom=43-248


      Moving on to the dyno day.

      Dyno:

      Letís start with a Disclaimer here, these numbers were realized with a no holds barred, break my turbos I don't care tune, pushing 27 psi mid-range and just holding as much WGDC as we could up top, if you ran this on the street your stock frames would most likely no last very long at all. This dyno session honestly had nothing to do with numbers it had to do with pushing as hard as we could on the stock frames to see what the HPFP upgrade could handle, that we realized a new stock motor / stock frame turbo N54 peak WHP, and scored big numbers was a nice bonus. FYI Dzenno will promptly send all emails to trash asking for these tunes...

      Modification break down:
      Completely Stock N54 engine
      Stock head
      VTT "Double Barrel" HPFP upgrade
      LPFP Walbro 450 in bucket to 450 Walbro inline
      VTT Stage 2 Billet turbochargers
      Cobb V3 AP flash tuning
      Tune by PTF
      Cobb FMIC
      BMS DP's
      CP-E charge pipe with Tial BOV
      BMS DCI
      100% E85 NO METH

      For the dyno session we ran the "Double Barrel" set up the entire time for safety reasons, and did a total of 6 runs. Dzenno was very busy and was able to squeeze an hour in to get these results, and as always he is the MAN when it comes to N54 tuning. First log and graph is literally pulling onto the dyno using the same tune we had been testing with for the past 2 weeks, strapping down, and firing off a run. Log shows zero timing corrections and HPFP is holding perfectly.

      1st run: 523WHP / 541WTQ.

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=0&data=3-15

      2nd run: 539WHP / 559WTQ - Added a little boost and timing, again log shows zero corrections and HPFP is holding fine

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=1&data=3-15

      3rd run: 542WHP / 571WTQ - Again little boost and timing

      Datazaplog: http://www.datazap.me/u/vtt-shotgun-...og=2&data=3-15

      4th run: 547WHP / 582WTQ - More of the same

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=0&data=3-15

      5th run: 547WHP / 584WTQ - Very slight changes to boost only

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=1&data=3-15

      6th run: 558WHP / 619WTQ - Same map as 5th run, just full cool down, and 5th gear pull

      Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=2&data=3-15

      If you look in the logs you will see from run to run, the HPFP curve will vary slightly sometimes dropping slightly below Req, sometimes holding slightly above it, this is normal as even with the activation system adding fuel from the second pump the DME is still controlling the show and this is how we wanted it. Every run is different and the DME adjusts as it sees fit. If we wanted to really crank boost to 28-30 PSI in the mid-range we prob could have made 630-640WTQ and 560-570WHP but the gains up top started to flatten out, so there was no point to push the motor past this point.

      We have included every dyno file, log, graph, and jpeg in a zip attached to this post, feel free to analyze to your hearts content.








      Here are a few of pictures of the prototype housing, shaft, and pulley

      Prototype pictures:


























      Letís answer a few questions some people might have.

      Q & A:


      Q: Will this set up work for me if have stock turbos and just want to run E85 without worrying about mixing?

      A: 100% you can pull up to the pump, fill up with E85, and not worry about running out of fuel with as much power as you can possibly make with stock turbos, this also applies to upgraded stock frames such as our Stage 1-2, and RB turbos

      Q: What happens if the HPFP fails will I be stranded?

      A: Good question, the answer is no, the way BMW has set up this HPFP system is, even if the HPFP fails the LPFP will bypass through the pump and you can limp the car home. We actually unplugged the "Single Barrel" system and drove the car for 30 miles with no issues except a limp condition and low power

      Q: What if the belt breaks or comes off, I will be stranded then right, because the pump isn't turning?

      A: Again no, with the way BMW has set up the system as long as you have steady LPFP even with the HPFP not turning at all, you can limp the car home. How do we know this, well we went as far as to remove the belt from the car and drive it for a few miles with no power steering or charging, it drove just fine on the LPFP fuel only with no HPFP rotation. We did our best to leave no stone unturned

      Q: Can I run mixes of E85 and pump fuel with this set up?

      A: Absolutely, this will actually raise the amount of fuel the "shotgun" system can supply as it requires approximately 30% more volume to run E85.

      Q: What if I take a trip and there is no E85 near me, can I use just regular pump gas with the "Shotgun" system?

      A: Again absolutely, the system is 100% compatible with gas or Ethanol (E85), and will work perfectly with either fuel, or any combination of both.

      Q: Have you found out exactly how much WHP the "Double Barrel" can support on 100% E85

      A: We have not, we will be testing on our stage 3 system soon, the numbers we just made showed no signs of taxing the system at all, and this is with the system only adding a small amount of fuel

      Q: How long until I can have this kit on my car, I want to run 100% E85!!

      A: All testing is finalized, all Cad drawings are finalized, we should enter production quickly, and we anticipate having kits in stock ready to ship in 3 months, this is an estimate not a promise

      Q: I assume this upgrade is going to be very popular, how many kits do you plan on producing, and is there a way to get on a waiting list to avoid missing out on the first run, if so how does it work?

      A: For the first run we plan on producing 50-100 kits, we will be taking pre-orders starting next week for people that want to insure they get a spot. To get on the waiting list, you need to send a direct email to Tony@vargasturbo.com or Sales@vargasturbo.com with "Shotgun Preorder" in the subject line, there will be a non-refundable deposit required to hold a spot.

      We appreciate all your patience while we worked out the bugs in the system and look forward to pushing the platform! Please do not hesitate to drop us an email if you have other questions or type them below and we will answer them as best we can.
      This article was originally published in forum thread: VTT "Shotgun" HPFP upgrade announcement, 558WHP / 612WTQ Stage 2 started by VargasTurboTech View original post
      Comments 149 Comments
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        Already looked into, the belt can be routed either way, length stays exactly the same. It seems there was some confusion with how the belt was going to be run on the car leading to different routing diagrams, but I can attest by having test fit them both ways, same belt fits both configurations, if you have the belt routed like the bottom picture in your car, just follow the routing instructions we give with the kit and it will fit with no problems.

        Also 1855, and 1860 are .2" different, basically the same belt as the tensioner would take up that little bit of slack
      1. mycoupe's Avatar
        mycoupe -
        Click here to enlarge Originally Posted by continue5 Click here to enlarge
        how many people would have to pre-order to get this done?

        Demand is obliviously lower for the E60 but I still think it deserves attention. Plenty of E60 folks have expensive meth setups and there are only gonna be more modding as the E60 just took quite a nose dive in resale value these last few years.
        just buy the kit without the bracket and make your own. You'd be surprised how well a piece of cardboard, a sharpie and scissors to cut it out can be for mocking something up for measurements and then machining. Unless there is more than the bracket that would need to be made? Tony?
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        Click here to enlarge Originally Posted by mycoupe Click here to enlarge
        just buy the kit without the bracket and make your own. You'd be surprised how well a piece of cardboard, a sharpie and scissors to cut it out can be for mocking something up for measurements and then machining. Unless there is more than the bracket that would need to be made? Tony?
        We wont be selling kits piece meal, but if you wanted to buy a kit and try to fab up a bracket you can do that. The mounting on these is difficult, but not beyond the realm of someone who has some knowledge and a good fab shop at their disposal.
      1. nafoo's Avatar
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by VargasTurboTech Click here to enlarge
        Already looked into, the belt can be routed either way, length stays exactly the same. It seems there was some confusion with how the belt was going to be run on the car leading to different routing diagrams, but I can attest by having test fit them both ways, same belt fits both configurations, if you have the belt routed like the bottom picture in your car, just follow the routing instructions we give with the kit and it will fit with no problems.

        Also 1855, and 1860 are .2" different, basically the same belt as the tensioner would take up that little bit of slack
        Gotcha. On the E60 535, it has to be routed like the first diagram i posted, there is a line (coolant, trans i dont remember) that is in the way if you were going to route it like the bottom diagram, i just helped a friend do his belt a few weekends ago. I bet your kit would fit the 5 series just fine.
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        Gotcha. On the E60 535, it has to be routed like the first diagram i posted, there is a line (coolant, trans i dont remember) that is in the way if you were going to route it like the bottom diagram, i just helped a friend do his belt a few weekends ago. I bet your kit would fit the 5 series just fine.
        The belt has to be routed like the above configuration to work, the bottom will not. It very well may, but we would be hesitant to sell it someone with a 535 without confirming this.
      1. Sticky's Avatar
        Sticky -
        Vargas Turbocharger Technologies has achieved what many said was impossible. The N54 community no longer has to weep over fueling woes as a real HPFP upgrade is finally here. Vargas Turbo Tech delivered on their promise and has forged into new territory on the N54 platform. 100% E85 on upgraded turbos is now possible thanks to the 'Shotgun' HPFP upgrade and the N54 is loving it. The result with the HPFP upgrade from VTT is a new stock frame turbo record at 558 wheel horsepower as the motor finally gets all the E85 it needs.

        Keep in mind that this is on the stock head and surpasses results from N54's with upgraded stock frame turbochargers and ported heads. That says quite a bit as to the fueling capability of the system.

        Vargas did extensive testing and BimmerBoost was privy to the updates throughout the process. This took months to come about and VTT wanted to make sure everything was absolutely perfect, which it is. Not to mention the extensive presentation and data that should satisfy even the most skeptical. BimmerBoost wanted to make sure everything was perfect as well and watching the process unfold was an absolute pleasure thanks to quality communication especially once the logs showing the fuel pressure were seen showing the capability of the upgrade.

        There are two variations of the kit and Tony at Vargas Turbo Tech explains the options and data best himself below. Congratulations to Vargas for doing what many stated could not be done and for finally providing a proper fuel solution that does not involve the car having to bathe in methanol. Pictures, datalogs, and pricing are all below.

        Click here to enlarge

        We are happy to announce the VTT "Shotgun" HPFP upgrade kits for the N54 platform. This kit has been a long time in the making and after almost 3 months of daily testing we are finally happy with its consistency / reliability, and are ready to announce the product. We took the car to the dyno on Thursday to provide some numbers as well as logs to go along with those numbers so you can see the pronounced effect E85 can have on these engines. The results were nothing less than shocking and I think you will agree this upgrade is really going to open up the platform.

        So let’s start out with the product descriptions and details. We are going to have 2 variations of the kit one for people on stock frames making anywhere from 400-550WHP, then one for people on stage 3 or single style turbos for 550whp+.

        Product Description:

        The first option is our "Single Barrel" kit; this kit is basically a HPFP relocation and overdrive kit. You take your existing HPFP, remove it, and using our mounting system, mount it in the accessory cluster to be driven by the belt. This allows the pump to be over driven, coupled with our new feed line, and rail modification this provides enough fuel for around 550WHP on 100% E85, with blends it can support even higher. We went through numerous pulley designs to find the optimum overdrive speed; too fast it would actually hurt fuel flow, and too slow would also hurt fuel flow.

        Included in the "Single Barrel" kit:

        - VTT Billet HPFP drive housing
        - VTT Billet Stainless Steel drive shaft (pre-assembled in housing)
        - High speed German ball bearings rated at 17,000RPM (pre-assembled in housing)
        - VTT Billet HPFP pulley
        - VTT HPFP housing mounting bracket
        - VTT Billet stock location HPFP block off plate
        - VTT High Pressure feed line
        - VTT Low Pressure feed adaptor
        - VTT "Single Barrel" modified fuel rail (core charge applies)
        - Water line modification parts
        - Serpentine belt
        - Plug and Play wiring harness
        - All hardware required for assembly

        Tentative pricing for the "Single Barrel" kit is $1099-$1299

        Next we move on to our "Double Barrel" kit. Our Double barrel kit adds a second HPFP to your existing HPFP system. Using the same mounting system as our "Single Barrel" Kit, you now leave your stock HPFP in place and mount an additional pump on the accessory drive, then using our custom high / low pressure feed lines, modified fuel rail, and activation system, the second pump is now run on demand, and that demand can be user adjusted for activation point, and fuel added.

        Included in the "Double Barrel" Kit:

        - VTT Billet HPFP drive housing
        - VTT Billet Stainless Steel drive shaft (pre-assembled in housing)
        - High speed German ball bearings rated at 17,000RPM (pre-assembled in housing)
        - VTT Billet HPFP pulley
        - VTT HPFP housing mounting bracket
        - VTT High Pressure feed lines with all fittings
        - VTT High Pressure check valve with pre-assembled high pressure fittings
        - VTT Low Pressure feed lines
        - VTT LPFP pre-assembled "Y" fitting adaptor and lines
        - VTT "Double Barrel" modified fuel rail (core charge applies)
        - Water line modification parts
        - Serpentine belt
        - VTT HPFP activation system
        - Plug and play wiring harness for pumps
        - Wiring harness for activation system
        - All hardware required for assembly

        Tentative pricing for the "Double Barrel" kit is $1499-$1699 (without new pump) $1799-$1999 (with new pump)

        Installation:

        I am sure everyone is curious how hard the kit is to install, what has to be modified etc., we did our best to keep the kit very passive meaning it would be easy to return your vehicle back to stock with little effort, in order to mount the pump in the new location, you have to modify one water line, and bend an AC line out of the way, that’s all the modifications required everything else is bolt on, or off. If you choose to go back to stock at any point, you can purchase the modified water line from BMW and replace it.

        For the "Single Barrel" kit, installation requires intake manifold removal, stock HPFP removal, stock high pressure feed line removal, installing HPFP block off plate, unbolting and rerouting the LPFP line to where the pump will now run, plugging in the plug extension, reinstalling intake manifold, remove charge pipe, remove cooling fan, unbolt 2 bolts from drivers side motor mount, jack up driver side of motor to allow easier access to AC compressor, remove 3 bolts holding AC compressor, install mounting bracket in place over the AC compressor and install new bolts securing in place, follow supplied instructions to modify water line to clear pulley, lower motor back down install bolts, install HPFP to housing, reroute LPFP feed to HPFP and connect, install new belt on system, reinstall fan, remove stock fuel rail, install modified rail, install high pressure feed line from HPFP to rail, reinstall charge pipe, reinstall intake, purge system, and start vehicle. I can install the system in under 2 hours, but I have done it many times, for a first time I would suggest 4 hours for a shop, 5-6 hours for a person at home.

        For the "Double Barrel" system Same as above, except stock pump stays in place, another high pressure feed line, high pressure check valve, and another high pressure connection to the rail, as well as different LPFP routing, and a little more wiring. I would say “Double Barrel" 4-5 hours for a shop 6-7 for a someone trying at home.

        Click here to enlarge

        Click here to enlarge

        Let’s get into some of the testing and numbers

        Testing:

        We have done extensive testing over the past 3 months, and during this time have learned quite a bit about the HPFP system.

        We will start with some logs on 100% E85 and the completely stock HPFP system in place EXCEPT we did use a modified fuel rail as it was all we had ( spoiler alert, it didn’t matter), this was done with a brand new HPFP installed just for these tests.

        The first one is OTS HPFP Req and OTS AFR levels on a mild tune we used for most of our testing, you can see the HPFP just nose dives almost instantly when trying to make these runs on 100% E85 even on a mild tune

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...12&zoom=79-138

        Click here to enlarge

        Next one is same tune, just 2500 Req and leaner AFR levels, some people have pushed the theory that asking the DME to request more HPFP pressure will help the HPFP deliver more fuel, this not the case, and you are just putting unneeded strain on the HPFP system for no gains, you always want to run as little HPFP as possible to provide the fuel you need as the higher the pressure the more strain you are putting on the entire system

        Datazap log:http://www.datazap.me/u/vtt-shotgun-...2&zoom=142-276

        Click here to enlarge

        Next one is same tune with 2500 Req and OTS fuel, again same thing HPFP just nose dives instantly

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...12&zoom=49-107

        Click here to enlarge

        Ok now we have a "Single Barrel" log on 100% E85 a MUCH more aggressive tune (it’s actually the same tune we made 523WHP / 541WTQ on) You can see the HPFP holds almost perfectly the entire time except that small blip at low RPM. This log is also a 3-4 shift wot almost to redline in 4th for maximun load and fueling needs, you can see the whole log in the link below to see how the "Single Barrel" does on the shift

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...15&zoom=43-248

        Click here to enlarge

        Moving on to the dyno day.

        Dyno:

        Let’s start with a Disclaimer here, these numbers were realized with a no holds barred, break my turbos I don't care tune, pushing 27 psi mid-range and just holding as much WGDC as we could up top, if you ran this on the street your stock frames would most likely no last very long at all. This dyno session honestly had nothing to do with numbers it had to do with pushing as hard as we could on the stock frames to see what the HPFP upgrade could handle, that we realized a new stock motor / stock frame turbo N54 peak WHP, and scored big numbers was a nice bonus. FYI Dzenno will promptly send all emails to trash asking for these tunes...Click here to enlarge

        Modification break down:
        Completely Stock N54 engine
        Stock head
        VTT "Double Barrel" HPFP upgrade
        LPFP Walbro 450 in bucket to 450 Walbro inline
        VTT Stage 2 Billet turbochargers
        Cobb V3 AP flash tuning
        Tune by PTF
        Cobb FMIC
        BMS DP's
        CP-E charge pipe with Tial BOV
        BMS DCI
        100% E85 NO METH

        For the dyno session we ran the "Double Barrel" set up the entire time for safety reasons, and did a total of 6 runs. Dzenno was very busy and was able to squeeze an hour in to get these results, and as always he is the MAN when it comes to N54 tuning. First log and graph is literally pulling onto the dyno using the same tune we had been testing with for the past 2 weeks, strapping down, and firing off a run. Log shows zero timing corrections and HPFP is holding perfectly.

        1st run: 523WHP / 541WTQ.

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=0&data=3-15

        2nd run: 539WHP / 559WTQ - Added a little boost and timing, again log shows zero corrections and HPFP is holding fine

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=1&data=3-15

        3rd run: 542WHP / 571WTQ - Again little boost and timing

        Datazaplog: http://www.datazap.me/u/vtt-shotgun-...og=2&data=3-15

        4th run: 547WHP / 582WTQ - More of the same

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=0&data=3-15

        5th run: 547WHP / 584WTQ - Very slight changes to boost only

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=1&data=3-15

        6th run: 558WHP / 619WTQ - Same map as 5th run, just full cool down, and 5th gear pull

        Datazap log: http://www.datazap.me/u/vtt-shotgun-...og=2&data=3-15

        If you look in the logs you will see from run to run, the HPFP curve will vary slightly sometimes dropping slightly below Req, sometimes holding slightly above it, this is normal as even with the activation system adding fuel from the second pump the DME is still controlling the show and this is how we wanted it. Every run is different and the DME adjusts as it sees fit. If we wanted to really crank boost to 28-30 PSI in the mid-range we prob could have made 630-640WTQ and 560-570WHP but the gains up top started to flatten out, so there was no point to push the motor past this point.

        We have included every dyno file, log, graph, and jpeg in a zip attached to this post, feel free to analyze to your hearts content.

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        Here are a few of pictures of the prototype housing, shaft, and pulley

        Prototype pictures:

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        Let’s answer a few questions some people might have.

        Q & A:


        Q: Will this set up work for me if have stock turbos and just want to run E85 without worrying about mixing?

        A: 100% you can pull up to the pump, fill up with E85, and not worry about running out of fuel with as much power as you can possibly make with stock turbos, this also applies to upgraded stock frames such as our Stage 1-2, and RB turbos

        Q: What happens if the HPFP fails will I be stranded?

        A: Good question, the answer is no, the way BMW has set up this HPFP system is, even if the HPFP fails the LPFP will bypass through the pump and you can limp the car home. We actually unplugged the "Single Barrel" system and drove the car for 30 miles with no issues except a limp condition and low power

        Q: What if the belt breaks or comes off, I will be stranded then right, because the pump isn't turning?

        A: Again no, with the way BMW has set up the system as long as you have steady LPFP even with the HPFP not turning at all, you can limp the car home. How do we know this, well we went as far as to remove the belt from the car and drive it for a few miles with no power steering or charging, it drove just fine on the LPFP fuel only with no HPFP rotation. We did our best to leave no stone unturned

        Q: Can I run mixes of E85 and pump fuel with this set up?

        A: Absolutely, this will actually raise the amount of fuel the "shotgun" system can supply as it requires approximately 30% more volume to run E85.

        Q: What if I take a trip and there is no E85 near me, can I use just regular pump gas with the "Shotgun" system?

        A: Again absolutely, the system is 100% compatible with gas or Ethanol (E85), and will work perfectly with either fuel, or any combination of both.

        Q: Have you found out exactly how much WHP the "Double Barrel" can support on 100% E85

        A: We have not, we will be testing on our stage 3 system soon, the numbers we just made showed no signs of taxing the system at all, and this is with the system only adding a small amount of fuel

        Q: How long until I can have this kit on my car, I want to run 100% E85!!

        A: All testing is finalized, all Cad drawings are finalized, we should enter production quickly, and we anticipate having kits in stock ready to ship in 3 months, this is an estimate not a promise

        Q: I assume this upgrade is going to be very popular, how many kits do you plan on producing, and is there a way to get on a waiting list to avoid missing out on the first run, if so how does it work?

        A: For the first run we plan on producing 50-100 kits, we will be taking pre-orders starting next week for people that want to insure they get a spot. To get on the waiting list, you need to send a direct email to Tony@vargasturbo.com or Sales@vargasturbo.com with "Shotgun Preorder" in the subject line, there will be a non-refundable deposit required to hold a spot.

        We appreciate all your patience while we worked out the bugs in the system and look forward to pushing the platform! Please do not hesitate to drop us an email if you have other questions or type them below and we will answer them as best we can.
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Wow! Now this is a killer innovation. Congrats on the achievement VTT!

        Rob
      1. Nugs's Avatar
        Nugs -
        Small spelling error, in the last answer of the FAQ you have used 'insure' instead of 'ensure'.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Nugs Click here to enlarge
        Small spelling error, in the last answer of the FAQ you have used 'insure' instead of 'ensure'.
        Good catch.
      1. idriveslo's Avatar
        idriveslo -
        Please run a single pump on a car and post data from the single alone. This looks very promising, but I would like to see more data on the single as well as the double.
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        Click here to enlarge Originally Posted by idriveslo Click here to enlarge
        Please run a single pump on a car and post data from the single alone. This looks very promising, but I would like to see more data on the single as well as the double.
        We have run the single barrell for almost 3 weeks using the same tune as we pulled onto the dyno on, 523WHP. There is a log up there from the street testing, we can gladly post more logs of that testing if you would like, they look a lot like the one we posted already. Just let us know if you would like to see a few more and I can go back when I have time and find them.
      1. deemarr n55's Avatar
        deemarr n55 -
        No n55 love ? Or will it fit both motors ? Very nice btw.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by deemarr n55 Click here to enlarge
        No n55 love ? Or will it fit both motors ? Very nice btw.
        Read the thread...
      1. deemarr n55's Avatar
        deemarr n55 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Read the thread...
        What page is the n55 info on kind sir??? I'm at work can't go through every page.
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        Click here to enlarge Originally Posted by deemarr n55 Click here to enlarge
        What page is the n55 info on kind sir??? I'm at work can't go through every page.
        The short version is, we honestly do not know if it will fit on an N55 until we test fit it on an N55, that will come later, after we get the N54 kits in stock and shipping
      1. rawad1017's Avatar
        rawad1017 -
        do N55s really need this anyway?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by rawad1017 Click here to enlarge
        do N55s really need this anyway?
        With turbo upgrade options out there I mean it isn't going to hurt.
      1. deemarr n55's Avatar
        deemarr n55 -
        Click here to enlarge Originally Posted by VargasTurboTech Click here to enlarge
        The short version is, we honestly do not know if it will fit on an N55 until we test fit it on an N55, that will come later, after we get the N54 kits in stock and shipping
        Ok thanks tony
      1. kabnine's Avatar
        kabnine -
        I have read through all the pages, and couldn't see anyone having asked this yet. But will this work on RHD 135i's?

        Thanks
        David