MHD Flasher N54

MHD Flasher N54 is the first Android handheld application to bring ECU tuning and monitoring to the BMW N54 engine. The MHD Flasher reveals the immense margin of power BMW left on the table with the N54 while still retaining the sophistication of the original engine management program.

Cable required is a K+DCAN USB cable. The USB port of the cable requires an OTG adapter to connect to the micro USB port on the Android device. Bimmer Software sells tested cables.

It will read your stock ECU and "save" it. If the stock ECU is recognized by MHD, saving it will take only a couple of seconds. Otherwise, it may take an hour or more to read the stock ECU and save it on the Android device. Restoring the ECU would take a while, as an ECU write has to be performed, either from the file on the Android device or from the MHD built-in ECU library. After the first write of an MHD built-in map, switching maps (eg from 93 oct to 91 oct) only takes a couple of minutes.

The MHD Flasher built-in maps are provided by Wedge Performance, already known for their BMW N54 engine tuning. The first write of a MHD built-in map took 39 minutes. An intelligent car battery was used at 10-amp, to prevent the car battery from running low. Turn off power to any vehicle features to conserve vehicle battery, eg audio system, daytime running light, climate control, interior light, etc. When the Android device is writing the ECU for the first, time it will take a while. Turn on the device Airplane Mode after it starts writing the ECU in order to conserve device power. While the vehicle ECU is being written, do not operate any features or doors on the vehicle!

Logging options:

• Not needed: Boost PSI, STFT 1 and 2.
• Needed: Boost setpoint, timing correct cyl 1-6, LTFT 1 and 2.

Estimated engine output:

• Stage 1 pack. 2 maps included (Stage 1, Stage 1 + FMIC). Each with 4 octane variants (acn 91, 91, 93, 95), 340-385 hp.
• Stage 2 pack. 2 maps included (Stage 2, Stage 2 + FMIC). Each with 4 octane variants (acn 91, 91, 93, 95), 370-430 hp.
• E40 map. 40% of ethanol, 440hp.

Those are conservative, crank numbers. For instance the e40 map made 400whp on a stock car and would make more on a full bolt-on car.

Internet sources:

• MHD Flasher for N54 announcement (E90Post)
• MHD Flasher for N54 feedback and discussion (E90Post)
• Installed MHD flasher stage I N54 map on 135i (1addicts)
• Some Tune Comparisons/Reviews w/ Logs/Virtual Dyno (MHD OTS Maps vs the JB4 + Backend Flashes) (E90Post)
• MHD Tuning (Facebook)
• MHD Flasher N54 (Google Play)
• MHD Flasher User's Guide by Twisted Tuning
• BMW automobiles with the N54 engine