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    • Big Boost offers Stage 3 BMW N55 (E & F-Series) turbo upgrade kits with 620+ whp capability

      Big Boost is a new player in the BMW N55 engine tuning world. They are showing what is a very strong N55 turbo upgrade offering. They have three stages the most powerful of which produces over 620 horsepower at the wheels.


      That is serious power out of the N55 motor. Let's look at the stages:

      Stage 3.1 (5459 turbo) capable of 470 whp
      Stage 3.2 (5959 turbo) capable of 520 whp
      Stage 3.3 (6159 turbo) capable of 620 whp

      What is included?

      – Cast exhaust manifold– Master Power 6159 turbocharger (7-Blade billet aluminum compressor wheel)– Wastegate mount– Turbo to intercooler charge pipe– BOV mount– Turbo inlet pipe– Big Boost down-pipe– Custom coolant pipe– Engine block coolant adapter– Intercooler inlet adapter– Oil lines

      Thankfully, they provide proof to match their claims.

      BMW 135i with flash tune @ 27 psi:



      BMW 135i with flash tune @24.5 psi:


      Tuning is done through an unnamed flash tune and flash tuning on the N55 motor is still relatively in the early stages with bigger turbo upgrades. More details on the tune as well as results on F-Series and E-Series cars would be appreciated.

      They price the updates starting at $4250 which certainly is competitive. As for seeing it in action, here:


      No 1/4 mile times or pulls but it definitely is making the power on the dyno on that F22 tuned through the factory DME along with a JB4. Fuel-It! port injection is providing the necessary fuel.

      Certainly good results so far and we look forward to independent results.




















      This article was originally published in forum thread: Big Boost offers Stage 3 BMW N55 (E & F-Series) turbo upgrade kits with 620+ whp capability started by Sticky View original post
      Comments 76 Comments
      1. Sticky's Avatar
        Sticky -
        Here's a slip, kind of slow for the claimed numbers IMO:

        Click here to enlarge
      1. Juan@BigBoost-Billet's Avatar
        Juan@BigBoost-Billet -
        The only time slip we have is at 20 psi and letting off the throttle 100 ft before the finish line, the car keeps going side to side. I even have a slip of 11.9 at 96 mph.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Juan@Big_Boost_turbo Click here to enlarge
        The only time slip we have is at 20 psi and letting off the throttle 100 ft before the finish line, the car keeps going side to side. I even have a slip of 11.9 at 96 mph.
        I understand. Just got to keep hitting the track but obviously the numbers are a product of the setup and traction.

        The dyno pulls are very strong.

        Who is the tuner?
      1. Saca135i's Avatar
        Saca135i -
        Are the graphs posted of the 6159 turbo?
      1. AMGAffalterbach's Avatar
        AMGAffalterbach -
        Funny, I ran across this video on YouTube today then found the Bimmerboost article when I was doing my daily check.

        Seems like this kit is still undergoing testing and fine tuning, but I'm curious what this offers over the Enzo package that members of 2Addicts like Luminous are using, which is all of the same bolt-ons it seems, port-injection, and a Garrett GTX3586 (which I think is just a GTX3582r with a swapped housing, couldn't find anything more on it). Sounds like Enzo does the custom manifold too and made 632/525 at 25psi on the F22 M235i N55B30O0, not sure if their manifold is twin scroll - doesn't seem like it since the GT3582, not the GTX, is the only twin-scroll unit in that category.

        Is the manifold pictured above twin-scroll? How is the lag with a 6159?

        Cool stuff though and good write-up Sticky, any time there is more competition in the space for great prices like this, it's good for us!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by AMGAffalterbach Click here to enlarge
        Cool stuff though and good write-up Sticky, any time there is more competition in the space for great prices like this, it's good for us!
        Thanks but it was very easy to do as they provided the data.

        Your post on the Enzo comparison and breakdown is much more difficult IMO and offers great insight. Let's see what everyone says.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by AMGAffalterbach Click here to enlarge
        Is the manifold pictured above twin-scroll? How is the lag with a 6159?
        I think @Juan@Big_Boost_turbo will be able to answer these questions shortly.
      1. Saca135i's Avatar
        Saca135i -
        was the 630 whp achieved on the stock flash tune?
      1. Torgus's Avatar
        Torgus -
        I hope they realize the n54 market is considerably larger.
      1. zinner's Avatar
        zinner -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I think @Juan@Big_Boost_turbo will be able to answer these questions shortly.
        There was some discussion on n54tech where a couple folks theorize that the twin scroll stuff is what limits you to 500-550 on the Pure Stage 2. The high velocity bank overheats at higher power levels.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by zinner Click here to enlarge
        There was some discussion on n54tech where a couple folks theorize that the twin scroll stuff is what limits you to 500-550 on the Pure Stage 2. The high velocity bank overheats at higher power levels.
        Interesting, that could be right on.

        Hopefully @Juan@Big_Boost_turbo provides more details soon.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Torgus Click here to enlarge
        I hope they realize the n54 market is considerably larger.
        Everyone knows that but that doesn't mean there isn't an N55 market. Frankly, a solid turbo upgrade can have more of the N55 market to itself rather than be crammed in between tons of offerings in the N54 world.
      1. Torgus's Avatar
        Torgus -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Everyone knows that but that doesn't mean there isn't an N55 market. Frankly, a solid turbo upgrade can have more of the N55 market to itself rather than be crammed in between tons of offerings in the N54 world.
        That is true. It's a good price for the N55 guys imo.

        If this sold for 4k on the N54 I think they would have a boat load of sales. Enough below most top mounts to get some of their sales and enough above JP works to get some of those sales as well.

        The N54 is creaming for a cast log style top or bottom mount as I have said form basically day one.

        Anywho nice to see the N55 get some love. It needs it!
      1. Juan@BigBoost-Billet's Avatar
        Juan@BigBoost-Billet -
        Hey!

        Our manifold is twin scroll, the thing with Pure stage 2 is that the turbine housing is really small, generating a lot of back pressure, that's why they don't go over 550 - 590 whp. With our manifold that is not a problem.

        The 135i had a flash tune, the only modification was removing the torque limiter to prevent the throttle body from closing.

        Lag on the 6159 is not too bad, full boost is achieved by 3500 rpms.

        We are working on the N54 bottom mount with a cast manifold.
      1. Torgus's Avatar
        Torgus -
        Click here to enlarge Originally Posted by Juan@Big_Boost_turbo Click here to enlarge
        We are working on the N54 bottom mount with a cast manifold.
        Awesome any ETA?

        Website? Where are you located?
      1. AMGAffalterbach's Avatar
        AMGAffalterbach -
        Click here to enlarge Originally Posted by Juan@Big_Boost_turbo Click here to enlarge
        Hey!

        Our manifold is twin scroll, the thing with Pure stage 2 is that the turbine housing is really small, generating a lot of back pressure, that's why they don't go over 550 - 590 whp. With our manifold that is not a problem.

        The 135i had a flash tune, the only modification was removing the torque limiter to prevent the throttle body from closing.

        Lag on the 6159 is not too bad, full boost is achieved by 3500 rpms.

        We are working on the N54 bottom mount with a cast manifold.
        Interesting to know thank you for the answer! I think the whole idea of twin scroll turbos especially when going to a large single, in any application N54 or N55, is a smart engineering solution to dealing with what would normally be a lot more lag. Full boost by 3500 RPM isn't that bad in comparison to a Dinan S3 M235i I drove, I think it was broken but that car was so underwhelming and laggy.

        I know stock frame turbos like pure stage 2 spool well, with a similar A/R, but as you said, it reaches that power limit so anything over that you're probably just hitting the choke line.
      1. Dane083's Avatar
        Dane083 -
        Any news on RHD fitment?
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        Click here to enlarge Originally Posted by Juan@Big_Boost_turbo Click here to enlarge
        Hey!

        Our manifold is twin scroll, the thing with Pure stage 2 is that the turbine housing is really small, generating a lot of back pressure, that's why they don't go over 550 - 590 whp. With our manifold that is not a problem.

        The 135i had a flash tune, the only modification was removing the torque limiter to prevent the throttle body from closing.

        Lag on the 6159 is not too bad, full boost is achieved by 3500 rpms.

        We are working on the N54 bottom mount with a cast manifold.
        If full boost is achieved by 3500 RPM why not post a dyno graph with RPM as the bottom Axis instead of MPH? Then it would be very clear for everyone to see when full boost is achieved. I say this because just the curve of the graph looks like a laggy single turbo graph, but you cannot tell because RPM is not shown.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Dane083 Click here to enlarge
        Any news on RHD fitment?
        I think they said no RHD but that it might fit in theory.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Tony@VargasTurboTech Click here to enlarge
        If full boost is achieved by 3500 RPM why not post a dyno graph with RPM as the bottom Axis instead of MPH? Then it would be very clear for everyone to see when full boost is achieved. I say this because just the curve of the graph looks like a laggy single turbo graph, but you cannot tell because RPM is not shown.
        I think you have a point. I would like to see RPM on the axis as well.