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    • Burger Tuning E82 DCT BMW N55 135i dyno results with Vargas Stage 2 turbocharger upgrade - 463 wheel horsepower

      We've got the Vargas Stage2 N55 turbo running on our 2011 135i DCT car and was finally able to hit up the dyno for a little tuning today. The vehicle is FBO but equipped with a CPE replacement catted DP. We've recently modified both the E series N55 ISO JB4 firmware for large turbo support and developed an entirely new back end flash. To enable the JB4 large turbo maps you just enable the 3.5 bar TMAP sensor using version 5.5 or later.


      This changes map 1 to 16psi, map 2 to 19psi, and methanol mapping as high as your turbo will take you. All with reduced taper to redline to let the larger turbo shine.

      Dyno testing was done on simulated 93 octane (91 + 1 can of NOS octane booster), and the methanol testing was done with a single CM10 nozzle. Overall very pleased with the results especially for an odor free vehicle. The pump map is a touch aggressive but really showcases what the turbo can do. On pump gas I think the car would come very close if not take our F80 M3 if the M3 is running the stock tuning. And on meth would come very close to the M3 on the E30 map.







      This article was originally published in forum thread: N55 135i dyno w/ Vargas Stage2 Turbo started by Terry@BMS View original post
      Comments 50 Comments
      1. alex@ABRhouston's Avatar
        alex@ABRhouston -
        Its in the works. Trust me on this.
      1. iuhutch's Avatar
        iuhutch -
        Click here to enlarge Originally Posted by VegasJD Click here to enlarge
        lol yeah thanks i deleted them i should have reported them but i didnt i dont need negative comments on my videos, im the driver ok, my passengers are my video guys im waiting for like 4 videos of runs from last week and the ones i did today racing a 500hp mustang on e85, and 2 from the intial setup, what i dont think you realize is the tune and flash i just got yesterday, i had basic stuff and flash, it also took me over 2 months before i could even back flash my car so its been a lot longer journey to get the car there. It pulled really good in this heat tonight to almost 20lbs boost with meth
        A bit melodramatic don't you think? I guess I could have fluffed up my verbiage a bit but my questions in the comments are still valid.

        #POP - progress over protection; glad to hear you're getting her all buttoned up!
      1. iuhutch's Avatar
        iuhutch -
        Click here to enlarge Originally Posted by VegasJD Click here to enlarge
        lol yeah thanks i deleted them i should have reported them but i didnt i dont need negative comments on my videos, im the driver ok, my passengers are my video guys im waiting for like 4 videos of runs from last week and the ones i did today racing a 500hp mustang on e85, and 2 from the intial setup, what i dont think you realize is the tune and flash i just got yesterday, i had basic stuff and flash, it also took me over 2 months before i could even back flash my car so its been a lot longer journey to get the car there. It pulled really good in this heat tonight to almost 20lbs boost with meth
        A bit melodramatic don't you think? I guess I could have fluffed up my verbiage a bit but my questions in the comments are still valid.

        #POP - progress over perfection; glad to hear you're getting her all buttoned up!
      1. Sticky's Avatar
        Sticky -
        OP edited for formatting and promoted to the front page.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        The turbo stops making power over 6500rpm so I just stopped revving it up. We shift it around 6000rpm.
        Why? What is the stock redline?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JET Click here to enlarge
        ABR - I would love to see some data backing this claim up. In a turbo application more CFM does not always equal more power. You actually lose velocity, but if the head is one of the limiting factors then you can gain HP. If the turbo is the limiting factor, then porting the head if it is already free flowing may be worthless. I haven't seen anyone else try this so getting some info out there if it is a good mod will get you more business!
        All data thus far shows large benefits on the N54 and N55 heads. They are hardly BMW's best cylinder head work.
      1. JET's Avatar
        JET -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        All data thus far shows large benefits on the N54 and N55 heads. They are hardly BMW's best cylinder head work.
        I have no doubt there are good gains as an individual component, but the engine works as a system. With the tiny N55 turbo I have a feeling the gains are not going to justify the cost. Just a guess though and I would love to be proven wrong! Now if you go with a big single or N54 with upgraded turbos it will make a bigger difference.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JET Click here to enlarge
        I have no doubt there are good gains as an individual component, but the engine works as a system. With the tiny N55 turbo I have a feeling the gains are not going to justify the cost. Just a guess though and I would love to be proven wrong! Now if you go with a big single or N54 with upgraded turbos it will make a bigger difference.
        If you're moving more air it will always make a bigger difference % wise. Everything I have seen leads me to the conclusion that there is room to gain in the N54/N55 head.
      1. ezec63's Avatar
        ezec63 -
        Click here to enlarge Originally Posted by JET Click here to enlarge
        I have no doubt there are good gains as an individual component, but the engine works as a system. With the tiny N55 turbo I have a feeling the gains are not going to justify the cost. Just a guess though and I would love to be proven wrong! Now if you go with a big single or N54 with upgraded turbos it will make a bigger difference.
        But this is on a Vargas upgraded turbo which obviously pushes much more air then the stock unit and also when people start throwing on bigger singles. Its a great option to have and gains have showed on dzennos car with n54+rb turbos. So no doubt it will show gains on n55 + vargas turbo
      1. JET's Avatar
        JET -
        Click here to enlarge Originally Posted by ezec63 Click here to enlarge
        But this is on a Vargas upgraded turbo which obviously pushes much more air then the stock unit and also when people start throwing on bigger singles. Its a great option to have and gains have showed on dzennos car with n54+rb turbos. So no doubt it will show gains on n55 + vargas turbo
        Thanks, I will have to look that up. That is exactly what I was asking for was data from other cars.
      1. ChuckD05's Avatar
        ChuckD05 -
        i want this on a msport x1 or 3
      1. Nugs's Avatar
        Nugs -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Why? What is the stock redline?
        7000rpm
      1. sahyoun's Avatar
        sahyoun -
        Click here to enlarge Originally Posted by JET Click here to enlarge
        ABR - I would love to see some data backing this claim up. In a turbo application more CFM does not always equal more power. You actually lose velocity, but if the head is one of the limiting factors then you can gain HP. If the turbo is the limiting factor, then porting the head if it is already free flowing may be worthless. I haven't seen anyone else try this so getting some info out there if it is a good mod will get you more business!
        Actually higher CFM with the same diameter tubing with the same boost is a higher velocity air. A higher CFM with the same piping/boost is always more velocity and if AFRs are dialed in it usually means more power.
      1. JET's Avatar
        JET -
        Click here to enlarge Originally Posted by sahyoun Click here to enlarge
        Actually higher CFM with the same diameter tubing with the same boost is a higher velocity air. A higher CFM with the same piping/boost is always more velocity and if AFRs are dialed in it usually means more power.
        2 things wrong with that, you aren't getting more CFM with the same size piping, it must be increased to increase the CFM. Secondly, as I stated, if you are increasing the CFM of the part that is not the choke point, then the gains will be less than expected. Ie, the head flows 60 lb/min and the turbo can flow 45 lb/min, then increasing the flow of the head even more will have minimal gains. When you then upgrade the turbo to a large unit, the head would be the restriction and gains much larger.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Why? What is the stock redline?
        Around 6800rpm. The DCT has pretty short gearing so shifting around 6000rpm maximizes time under peak power.
      1. maxnix's Avatar
        maxnix -
        Click here to enlarge Originally Posted by richpike Click here to enlarge
        Sweet. Nice work Terry. My only beef is with BMW - why didn't they ever offer a DCT in an E90!?
        In the USA, only with the E92 335is with the N54.

        In the rest of the world, N55 with DCT was mostly available in post LCI E9x.
      1. maxnix's Avatar
        maxnix -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        If you're moving more air it will always make a bigger difference % wise. Everything I have seen leads me to the conclusion that there is room to gain in the N54/N55 head.
        Especially the N55 as intake valves are 1mm larger in diameter and head cooling is so much better than the N54. Better crankcase oil vapor control and crankcase pressure wave control also. S55 Block is basically a closed deck N55 block.
      1. richpike's Avatar
        richpike -
        Click here to enlarge Originally Posted by maxnix Click here to enlarge
        In the USA, only with the E92 335is.

        In the rest of the world, N55 with DCT was mostly available in post LCI E9x.
        Yep - love the 335is, but it isn't practical for me. They offer an E90 M3 with DCT, but no DCT in the 335i E90... Boo. N

        ot going to lie, after seeing C&D's test today on the new S3, it is starting to call my name. DSG, 4-doors, but still relatively small, 0-60 in 4.4s, 12.9s quarter and typical Audi interiors? What's not to like?

        -Rich
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by richpike Click here to enlarge
        ot going to lie, after seeing C&D's test today on the new S3, it is starting to call my name. DSG, 4-doors, but still relatively small, 0-60 in 4.4s, 12.9s quarter and typical Audi interiors? What's not to like?
        Link me.
      1. richpike's Avatar
        richpike -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Link me.
        Only on paper right now. I can send you pics if you'd like.

        -Rich