• New quickest and fastest BMW N55 1/4 mile record - Vargas Turbo Tech upgraded and JB4 tuned 335 runs 11.4@123

      Congratulations are in order to BMS (Burger Motorsports) and Vargas Turbo Technologies on pushing the N55 BMW platform to new hights. Aftermarket BMW tuning has been dominated by the BMW N54 twin turbo motor up until this point and the newer single turbo N55 inline-6 motor has not received quite as much attention. As the N54 is out of production the N55 is finally getting a bit of tuner love and the proof is below in a new quickest and fastest world record 1/4 mile run.


      This 335 is the same car that set the N55 horsepower record last week with a 468 wheel horsepower run on a Dynojet thanks to its upgraded turbocharger from Vargas. BMS did the tuning and the result is a new world record in the real world on the drag strip. The 335 in question in an automatic vehicle and the run took place at the Famoso drag strip in California.

      This is still very early in the upgraded turbocharger game for the N55 motor so enthusiasts can expect the numbers to improve over the next year as the N55 motor finally gets to the next level. Congratulations to all involved, well done.

      This article was originally published in forum thread: VTT Stage 2 upgrade sets new N55 WR 11.4 at 123 MPH started by VargasTurboTech View original post
      Comments 103 Comments
      1. JETmn's Avatar
        JETmn -
        Just imagine once we get Vanos tuning to go with it! I'll have to break down and get one eventually, just not sure when. I always get the bug in the summer time Click here to enlarge I have CPO for another 40k miles...
      1. Sticky's Avatar
        Sticky -
        Congratulations are in order to BMS (Burger Motorsports) and Vargas Turbo Technologies on pushing the N55 BMW platform to new hights. Aftermarket BMW tuning has been dominated by the BMW N54 twin turbo motor up until this point and the newer single turbo N55 inline-6 motor has not received quite as much attention. As the N54 is out of production the N55 is finally getting a bit of tuner love and the proof is below in a new quickest and fastest world record 1/4 mile run.

        Click here to enlarge

        This 335 is the same car that set the N55 horsepower record last week with a 468 wheel horsepower run on a Dynojet thanks to its upgraded turbocharger from Vargas. BMS did the tuning and the result is a new world record in the real world on the drag strip. The 335 in question in an automatic vehicle and the run took place at the Famoso drag strip in California.

        This is still very early in the upgraded turbocharger game for the N55 motor so enthusiasts can expect the numbers to improve over the next year as the N55 motor finally gets to the next level. Congratulations to all involved, well done.

        Click here to enlarge
      1. Andrew@activeautowerke's Avatar
        Andrew@activeautowerke -
        This is the daily driver Ive been dreaming about. Cant wait till its retrofitted to work on a 435.

        Congrats to all involved in this project.
      1. E90Company's Avatar
        E90Company -
        Lol at the guy who thinks this will take a Z06 C6.

        Good numbers guys.
      1. VargasTurboTech's Avatar
        VargasTurboTech -
        Click here to enlarge Originally Posted by Andrew@activeautowerke Click here to enlarge
        This is the daily driver Ive been dreaming about. Cant wait till its retrofitted to work on a 435.

        Congrats to all involved in this project.
        Hey Andrew, do you have any info that the 435;s might be using a different turbo or something? Curious. I think tuning is going to be the biggest stumbling block.
      1. Terry@BMS's Avatar
        Terry@BMS -
        The biggest problem with the 435 is they use the electric wastegate. But with a kit like this the JB4 could control boost using a pneumatic wastegate like the older N55s use. Click here to enlarge
      1. VargasTurboTech's Avatar
        VargasTurboTech -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        The biggest problem with the 435 is they use the electric wastegate. But with a kit like this the JB4 could control boost using a pneumatic wastegate like the older N55s use. Click here to enlarge
        I do not see the electronic gates as a problem at all. They do the same thing as a vacuum gate would, just with voltage instead of vacuum, spoof the DME into thinking its seeing less boost than it is, its going to open the electronic gate later just as it would a vacuum gate. The biggest problem I see with these is, the DV. Since they have eliminated vacuum, you have no way to open a DV. An electronic DV that can hold high boost is going to have to be developed. That will not be an easy task, nor is something in the scope of work we could do as a turbo company.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by VargasTurboTech Click here to enlarge
        I do not see the electronic gates as a problem at all. They do the same thing as a vacuum gate would, just with voltage instead of vacuum, spoof the DME into thinking its seeing less boost than it is, its going to open the electronic gate later just as it would a vacuum gate. The biggest problem I see with these is, the DV. Since they have eliminated vacuum, you have no way to open a DV. An electronic DV that can hold high boost is going to have to be developed. That will not be an easy task, nor is something in the scope of work we could do as a turbo company.
        Technically speaking it's not quite that easy. As of right now we don't have control over them but that should come with time. But retrofitting a pneumatic we could control that today.
      1. VargasTurboTech's Avatar
        VargasTurboTech -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        Technically speaking it's not quite that easy. As of right now we don't have control over them but that should come with time. But retrofitting a pneumatic we could control that today.
        Maybe I am misunderstanding as I have not played with one yet, but the vacuum actuated gates are controlled by the DME provided voltage to a solenoid to vary PWM to allow that vacuum to pass through as needed to open and close the gates, when you spoof the system the DME thinks its seeing less boost so it doesn't allow the passing of vacuum to open the gate providing that extra boost. With the electronic gate it would seem, as I said I have no idea, that they just removed the vacuum middle man and now can use that voltage to control the gate directly. Again I am asking for an explanation as it would help me as well to understand how they work. So if you fooled the DME into thinking it was making less boost, it would still have control over the electronic gate it would just do so later, allowing for more boost? Any help on understanding would great as I am going to be seeing them sooner rather than later. Also, the DV is still a major issue even if you put a vacuum or boost gate on the turbo, its going to bleed boost until addressed. I also found a replacement boost actuated gate that will work on the N55 that I will play around with when I get time.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by VargasTurboTech Click here to enlarge
        Maybe I am misunderstanding as I have not played with one yet, but the vacuum actuated gates are controlled by the DME provided voltage to a solenoid to vary PWM to allow that vacuum to pass through as needed to open and close the gates, when you spoof the system the DME thinks its seeing less boost so it doesn't allow the passing of vacuum to open the gate providing that extra boost. With the electronic gate it would seem, as I said I have no idea, that they just removed the vacuum middle man and now can use that voltage to control the gate directly. Again I am asking for an explanation as it would help me as well to understand how they work. So if you fooled the DME into thinking it was making less boost, it would still have control over the electronic gate it would just do so later, allowing for more boost? Any help on understanding would great as I am going to be seeing them sooner rather than later. Also, the DV is still a major issue even if you put a vacuum or boost gate on the turbo, its going to bleed boost until addressed. I also found a replacement boost actuated gate that will work on the N55 that I will play around with when I get time.
        The basic problem is the control scheme is sort of different. With the pneumatic duty cycle is increased to allow more vacuum in to the wastegate canister, to provide more force pulling it closed, to counteract the back pressure trying to push it open. With the new electric gate, with my current understanding of it, duty cycle is applied to determine an absolute position of the gate, and then varied as needed by the DME's PID to control boost. This subtle change makes piggyback tuning for them a lot more difficult. And currently there are zero F series flash tools available.
      1. VargasTurboTech's Avatar
        VargasTurboTech -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        The basic problem is the control scheme is sort of different. With the pneumatic duty cycle is increased to allow more vacuum in to the wastegate canister, to provide more force pulling it closed, to counteract the back pressure trying to push it open. With the new electric gate, with my current understanding of it, duty cycle is applied to determine an absolute position of the gate, and then varied as needed by the DME's PID to control boost. This subtle change makes piggyback tuning for them a lot more difficult. And currently there are zero F series flash tools available.
        Makes perfect sense. I think tuning the newer cars is going to get harder and harder as the DME's get more complicated. Looks like getting a good turbo upgrade ready to go will be easier than figuring out tuning.
      1. maxnix's Avatar
        maxnix -
        Click here to enlarge Originally Posted by VargasTurboTech Click here to enlarge
        Makes perfect sense. I think tuning the newer cars is going to get harder and harder as the DME's get more complicated. Looks like getting a good turbo upgrade ready to go will be easier than figuring out tuning.
        So true, unfortunately.
      1. VargasTurboTech's Avatar
        VargasTurboTech -
        Click here to enlarge Originally Posted by JETmn Click here to enlarge
        Just imagine once we get Vanos tuning to go with it! I'll have to break down and get one eventually, just not sure when. I always get the bug in the summer time Click here to enlarge I have CPO for another 40k miles...
        From my understanding, all the vanos tables are available with the cars the new N55 Cobb ATR covers. I cant wait to get one of these on another customers car and let the PTF guys go nuts tuning it...Click here to enlarge Lots of cool things for the N55 crowd.
      1. SLV335I's Avatar
        SLV335I -
        Wasn't there a problem with the heads lifting on the N55 motors as the power goes up? I remember reading about it on one of these forums. Or was that just one car that had that problem?
      1. threethreefive's Avatar
        threethreefive -
        these are very exciting times for the n55 community. Great job Tony and Terry
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by SLV335I Click here to enlarge
        Wasn't there a problem with the heads lifting on the N55 motors as the power goes up? I remember reading about it on one of these forums. Or was that just one car that had that problem?
        Maybe you are thinking of the heads cracking on the N20 motors?
      1. Sticky's Avatar
        Sticky -
        Yeah I'd be very surprised that to hear the head is lifting at this power level.
      1. maxnix's Avatar
        maxnix -
        Click here to enlarge Originally Posted by SLV335I Click here to enlarge
        Wasn't there a problem with the heads lifting on the N55 motors as the power goes up? I remember reading about it on one of these forums. Or was that just one car that had that problem?
        Who knows? Posts like these with no verifiable citations neither prove nor disprove anything.
      1. SLV335I's Avatar
        SLV335I -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        Maybe you are thinking of the heads cracking on the N20 motors?
        I think you're right.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SLV335I Click here to enlarge
        I think you're right.
        That was the head cracking, not lifting.