S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE
S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE
S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE
S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE
S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE
S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE
S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE

S55 - BMW F80 F82 M3 M4 F87 M2C CustomROM TUNE

Regular price
$200.00 - $1,449.00
Sale price

****NEW CustomROM Features Available Now!  Our first release of the bootmod3 CustomROM is now ready for the S55 engine vehicles while we continue to work on adding these features to other vehicles in the bootmod3 lineup. Changes done for the S55 are being ported to the N55 vehicles followed by the B58.



All new CustomROM tunes come with a fixed OTS Rolling Anti-Lag (17-18psi) at no charge.   Fully customizable Anti-Lag is an available option for $200 and includes various tunable settings and safeties such as Anti-Lag Boost, AFR, min Accel Pedal required, Max. Time in Anti-lag mode, Engine Speed, Min and Max Temperature thresholds for Oil, Exhaust Gas Temps and others.  **note all Map Switching slots 1-4 share the same Anti-Lag settings.

For instructions on how to use the Anti-Lag functionality please visit this link:


Map Switching 

This is what to expect from Map Switching:  Initially you’ll buy a new CustomROM tune from us,  Paul and his team will work to dial the tune in on the mods and fuel type you choose.  Next,  you’ll have 3 additional optional slots, sold separately,  to have variations of this map. 

Some examples of great uses for map switching are to have street or drag map variation with torque by gear limitations for different tires or road surfaces,   a kill map with higher boost/timing to be used on occasion,  a daily map with reduced boost, valet, or flames map, etc. 


Flex Fuel 

A Flex Fuel tune will start off as a low ethanol pump gas or race gas tune and then dynamically adjust boost, timing, AFR, and fuel supply depending on how much ethanol content is added to the fuel tank.   To allow for Flex Fuel tuning, an Ethanol (alcohol) fuel sensor and an Ethanol Content Analyzer (ECA) CANBus device need to be connected to the vehicle’s PT-CAN. To use Port Injection with a Flex Fuel tune, we recommend a PI controller such as the Motiv Reflex which adjusts the port injection output based on the ethanol content from the sensor.


To read about these new CustomROM features available on the S55 engine refer to document below:

bootmod3 CustomROM Release - BMW S55 Engine


Custom tuning for S55 is available for pump gas, race gas, full E85 and E85 blends, as well as WMI.  Results will vary depending on the fuel used. 

We also offer road course specific tune calibrations where linear power delivery, smooth pedal sensitivity and torque management are dialed in so that you can exit the corners as smoothy as possible.

These are results that can be expected with stock turbos on an average reading Dynojet in good ambient conditions:
  • 93 Octane Pump Gas:  500+whp
  • 93 Octane Pump Gas + Meth: 550+whp
  • E85: 575+whp
  • E85 + meth: 600+whp 

These approximate results apply to Pure Stage 2+ and Vargas GC+ on a average reading Dynojet in ideal ambient conditions. 

  • 93 Octane Pump Gas:  630+whp
  • 93 Octane Pump Gas + meth:  690+whp
  • E50 on Stock Fuel System:  650+whp
  • E50 + meth:  700+whp
  • E85 + meth stock fuel system:  720+whp
  • E85 with Port Injection:  750+ whp 
  • E85 with Port Injection, built motor:  800+whp
*Results may vary depending on supporting mods, turbo brand, DA, Etc.
With upgraded turbos the power potential will come down to fuel octane.

Additional octane and oxygen content in the fuel is really needed to open up substantial power increases with a custom tune. E85 or even mild blends of ethanol like E30 or a Methanol injection kit can allow for a substantial increase in performance over pump gas alone. To take full advantage of upgraded turbos on full E85 you have to have Port Injection or meth injection. E40-50 seems to be the best blend with just the stock fuel system on upgraded turbos.

To take advantage of upgraded turbos on Full E85 you will need additional fueling beyond the capabilities of the stock fuel system. We recommend a fuel-it Stage 4 Port Injection kit with 750cc injectors and the AIC Split Second flash only controller. The other option is to add methanol injection. We recommend a minimum of two CM10 sized nozzles in the charge pipes and using 100% methanol. Either of these fueling upgrades will allow for 700+whp in most situations. At that point, the limit is only the stock rods, which Paul likes to stay under 650wtq/720whp to keep it safe on the stock motor.


Beyond power, the other benefits to Paul’s custom tune are drivability things, such as reducing that touchy pedal tip-in that makes it harder to launch in 1st with an aggressive tune, especially with 6mt. Pedal smoothness is similar to stock. Also, torque management by gear and rpm for increased traction in the lower gears is included with a custom tune. Other custom features are aggressive burbles and gunshot burbles / flames adjusted to taste as well as exhaust flap behavior in each mode. GTS startup roar aggressiveness can also be customized.

Some of the available map features  :

  • Top speed limiter removal
  • Exhaust flap adjustments
  • Cold start (cat heating on startup) removal for quieter cold start
  • Cat efficiency check (CEL) removal for de-cat downpipes (for off-road use)
  • Maps for upgraded turbos
  • E85, Ethanol blends, race gas and meth injection tuning
  • Custom Pedal Mapping
  • Linear torque curve maps
  • Traction management by rpm/gear
  • Road course, 1/4mi Drag, and 1/2mi specific tuning. 
  • Backend Flash maps for use with piggybacks
  • Custom burbles with greater aggression/adjustment range than OTS maps.  
  • Gunshots/flames tuning (requires full decat)
  • Customized i-Drive sport gauges


Our custom tunes require the remote tuning platform Bootmod3 by Pro Tuning Freaks.   BM3 licenses can be purchased here https://www.protuningfreaks.com/

Once you have purchased a custom tune from us and have activated your BM3 license you will need to request a custom tune within the BM3 app.  Here's how:

Within the Bootmod3 app you will go to your "My Maps" screen and click the button at the top "Request Custom", then choose  "Paul Johnson Tunes".   In the description/comments list your mods, fuel(tested eth% etc), and goals for the tune.

Once we receive your payment and your BM3 tune request Paul will prepare the base map for you to flash. 

Once the base map is flashed to the vehicle you will datalog the car.  Paul will review the logs and make the necessary revisions to the tune based on the logs. 


BOOTMOD3 by Pro Tuning Freaks is the world's First custom flash tuning platform for the BMW F and G series vehicles.

Cloud based solution with a web based interface for use with a laptop or with our mobile apps built for iOS and Android!

Developed and tested in-house from the ground up since its debut in November 2016 with new features and updates being added regularly makes the bootmod3 platform a custom BMW factory DME tuning solution like no other on the market since.

Build the ultimate tune for your S55 engine powered vehicle and go from stock to full race calibration, and everywhere in between, with a map switch in the provided mobile app. bootmod3 calibrates the factory vehicle modules over the OBD port in a matter of minutes in the convenience of your driveway or anywhere internet access is available.

bootmod3 app and cloud services offer many unique features not found in any other flash tune including and available TODAY:

  • Mobile app (iOS and Android) and Web (http://www.bootmod3.net) including Windows and macOS support
  • Datalogging hundreds of diagnostic channels, up to 40 channels concurrently
  • Datalog sharing and charting without a need to upload to 3rd party websites or apps using the mobile app or web browser
  • Cloud based storage for map data and datalogs
  • Reverting back to stock performance map and re-locking the DME to stock programming
  • Live Dash - realtime vehicle parameter monitoring via in-app gauges
  • Diagnostics
  • Read and clear trouble codes in all vehicle modules
  • Reset learned adaptations (octane, knock, Valvetronic, etc)
  • ECU power reset

    For more info on BM3 take a look at the FAQ here!

    *** OBD ENET cable required, available separately (Amazon $20)

    *** bootmod3 OBD WiFi Agent device is not required to use the bootmod3 platform. It is a convenience option that removes the need for using a laptop in the car when using bootmod3's features. If you're looking to simply load a tune on the car without much datalogging and monitoring then using your laptop is the ticket for you.

    *** DME removal from the engine bay is NOT REQUIRED


    Some items used and/or installed by PRO TUNING FREAKS may void portions of your vehicle’s factory warranty. Some items may not be legal for “on highway use”. PRO TUNING FREAKS makes no guarantees to the legality of any parts used for “on highway vehicles” and accepts no responsibility for compliance with the vehicle’s factory warranty.