BMW N54 Power Gains

07-11_BMW_335i_Convertible_William Stern Photography_12

When you hear someone mention “Sick Gainz” it’s typically in the neighborhood of at least one “Do you even lift, bro?”s.  But, there’s something even more deserving of the sick gain description.  The gains I’m talking are on your N54 powered BMW and the only supplement required is the Accessport.

Every 135, 335, and 535 (also included is any z4, x5 and x6 with a 35i insignia, and the 1m) from 2007ish to 2010ish (different models switch to and from different powerplants at different model years.  Click the link above and expand the compatibility section by clicking the “+” symbol below the product picture to see if your vehicle is compatible) is equipped with the N54 power plant.  ALL of these vehicles can benefit from tuning and basic bolt-on modifications from COBB Tuning. If you want to unlock the full potential of your BMW, our BMW 335i mods can make a difference in delivering increased horsepower and torque for a more exhilarating driving experience.

Stage1

There are Stage1 maps designed for a completely stock vehicle.  No changing of parts.  Easy installation.  Instant gains.

graph

Above we see a 2009 335i in completely stock form.  It puts a respectable 240hp and 273tq to the wheels.  That’s by no means the worst our dyno has seen and is plenty to make for a fun car.  But, the real fun is had after flashing the Accessport to the BMW.  This is the same car, on the same day, in the same conditions and it picks up 73hp and 105tq to the wheels over stock!  Only an ECU flash!  And it’s only $650!  This is the same map (of several) that will come on your Accessport to be used with 93 octane fuel.  Additional maps include those for different octane fuels and basic aftermarket bolt-ons.

Stage1+FMIC

There’s plenty of room for improvement if the the hundred extra torque at the wheels becomes too ordinary.  This improvement comes by way of BMW tuning with aftermarket parts that improve on the factory designs with a performance mindset.  The first step in the upgrade path offering the best bang for your buck would be an upgraded COBB front mount intercooler.

graph (1)

Here is a 2007 N54 equipped 335i.  The upgraded COBB Front Mount Intercooler (FMIC) and associated Stage1+FMIC map that comes on the Accessport provides gains of 30hp and 23tq to the wheels over the Stage1 map.  That’s a total of 90hp and 120tq over stock!

Stage2+FMIC

Still not enough?  Add on the COBB Downpipes and pick up an additional 50hp and about 50 more torque to the wheels over the Stage1 map.  That’s 120hp and 150tq to the wheels over stock!

graph (2)

This twin turbo inline 6 cylinder N54 makes good power from the factory.  It’s even more incredible after only an ECU flash from the Accessport.  For only $650 you have a 3 series that makes a few less horsepower and much more torque than its M3 counterpart.  Add on the COBB FMIC and COBB Downpipes and few vehicles you encounter will compete.


25 responses to “BMW N54 Power Gains”

  1. Which 335i N54has 240 HP on Stock? Shouldn’t it be 303 HP?
    Are there any updated Maps for the N54 of 2007 available?

    • Hey there, the numbers represented in the graphs are measured at the wheels. Manufacturers advertise power numbers at the crank (without drivetrain loss). You can find the most up-to-date maps in the Maps Section of our website.

      Marshall@COBB

  2. 2011 335is–no mods–Flashed the ECU with the Stage 1 aggressive map –blew the stock charge pipe apart on first pass–Charge pipe is a must for ECU upgrades–Stock wont handle—

  3. Thanks for the details for the Stage 1, Stage 1+ and Stage 2+. Do you have any similar representations for a 2007 – 2010 335i with Stage 3 upgrades?

      • Hi Kyle,where can i get the stage 2 map?I bought a access port but only got the Stage 1+fmic.I have downpipes and the car does not run good.Im miles away from tuners.People with older acess ports got those maps.Could you please help me?

    • Hey Dustin, we were using a Mustang Dyno for the power numbers displayed in this post.

      Marshall@COBB

  4. Hello. What are the pros and cons of this setup versus the JB4? I have a 2009 N54 and looking to upgrade. Thank you.

    • Hello, The JB is a piggy back unit. With this, the process is that information goes into the unit, the unit distorts it, and then puts it back into the ecu to achieve some desired output. The Accessport uses a flashing method, where Cobb cracks the ecu, determines how to edit the maps (expensive and difficult), and then your Accessport writes maps to the ecu, effectively changing your factory ecu, as opposed to manipulating the information going in to it in order to achieve some desired outcome. This is the main difference. Both can likely achieve the results you’re looking for. The Accessport is much easier to install. You can typically find the JB4 for a little cheaper.

      Kyle@COBB

  5. I hava a n92 335i N54 intake Downpipe and kit methanol wich one map do you recomend me? My brother gift to me v2 acces port New

  6. For the stage 2 +FMIC aggressive v3.01, it doesn’t mention octane. Is 93 required or is 91 still ok? I’m running a 535xi with intercooler, charge pipes, intake and downpipes upgraded. Love this thing on Cobb!!!

  7. I have a 2008 335xi with an N54. I’m looking to install catless downpipes. If I remap with a Stage 2 map, will this suppress any codes related to the removal of the OEM DP’s?

    • Hi Michael,

      It will not. Any codes related to the catless system will be present. We always recommend using quality catted downpipes. This helps not only with emissions but prevents any overboost related issues that come with a catless system.

      Kyle@COBB

  8. I have a 2008 BMW 535xi and I’m about to put on a downpipe, AFE intake, and NGK coilpacks and spark plugs. What map do you recommend for this?

    • Hi Tony,

      As it turns out, there is no off the shelf map compatible with a vehicle with aftermarket downpipes. Sorry for the bad news.

      Kyle@COBB

  9. 2010 335i Cobb stage 2 with magna flow pipes and the service engine light keeps saying bad catalytic converter on both banks, is there a way to eliminate those codes?

    • Hi there! We do not offer the ability to disable those codes. You would need to address the issue causing the catalytic converter codes.

      Marshall@COBB

Leave a Reply

Your email address will not be published. Required fields are marked *