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The upgraded turbo tune is a tune setup meant for those who are still running their stock, oem turbo but want to use flex fuel mix, (ethanol/e85) as a fuel source for more power.


A flex fuel kit is required. BM3 is working on a custom piece for the gen2 B58. For now we recommend the Visconti Flex Fuel Kit, seen here.

A90 Shop Performance Tunes - B58 Supra Stock Turbo CustomROM Flex Fuel Tune

  • Anti-Lag  

    All new CustomROM tunes come with our fixed OTS Rolling Anti-Lag (13-14psi) 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. 

    What NOT to expect about Map Switching:   These map slots are not full separate custom tunes.   They only adjust certain things about the base map such as boost and timing but do not include everything that can be adjusted such as valve timing and detailed boost control, etc.   Map switching is great but not as powerful or precisely adjustable as having separate tunes.  Separate CustomROM maps are needed if you are wanting to fully optimize all the tables and capabilities for each specific fuel type.


    Flex Fuel 

    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.

    **B58s require upgraded fuel system components that are sufficient to support the ethanol % that you intend to use with your Flex Fuel tune. (I.E. upgraded HPFP, LPFP, Port Injection, and or Methanol Injection). 


    To read about these new CustomROM features available on the B58 Gen 2 engine refer to document below:

    bootmod3 CustomROM Release - BMW S55 Engine

    Custom tuning for B58 Gen 2 Stock turbos/stock fuel system is available for pump gas, race gas, and ethanol blends with methanol injection.  Results will vary depending on the fuel used and the weigh/traction of your particular N55 model.

    With Sam’s Stage 2 93 octane tune on stock turbo / stock fuel system you can expect 500+ Whp on an average reading Dynojet in good ambient conditions.

    Upgraded turbo and ethanol tunes for B58 require upgraded fuel systems, port injection, and or methanol injection.

    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
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