Flash Options

MHD currently features a wide array of flash-time options that you are able to adjust to your liking.  These can be applied to any map (OTS or custom).  Below are details on each of the possible options.  Check back often, as we are constantly adding to and improving these options!

The screenshot to the left shows a sample of some of the available flash options.  These can be broken down into a few different categories based on the setting.  Our terminology is as follows:

• Checkbox:  this is a simple enable / disable of the flash option.  See “Remove Top Speed” or “Start-up Roar” in the screenshot.

• Toggle:  this toggles the flash option on, and then expands to show additional configuration options related to it.  See “Exhaust Burble” or “Limit Power by Gear” in the screenshot.

• Picker:  this functions similar to a dropdown list, in which a selection must be made from the possible options.  See “Aggressiveness” within burble settings in the screenshot.

• Slider:  this is used to set a value to your liking, keeping it within the defined minimum and maximum range.  See “Duration (base)” or “Min RPM” within burble settings in the screenshot.

Stepper:  this is used to increase or decrease a value by a set increment with each button press.  See “1st” and “2nd” gear with +/- buttons within power per gear settings in the screenshot.

 

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ATTENTION:  Not all flash options are available for all vehicles / engines.  For flash option support for your specific engine / vehicle, please see the section titled “Flash Options - Engine Chart” located below the flash option descriptions.

Flash Options:

Linear Throttle

This flash option changes the throttle mapping to linear as opposed to the stock BMW pedal mapping which is set to give a false sense of torque (40% throttle = 80% of torque).  Instead, 40% throttle = 40% torque with the linear mapping.

Adjust Throttle Sensitivity

In stock form, all N54 except for the 1M contain a lag / signal filtering which gives a small delay from when you press the throttle until the DME starts acting upon your input.  This flash option allows you to decrease or fully remove this delay, depending on your personal preference.  To fully remove it, simply move the slider all the way to the right to the "More reactive (1M)" position.  If you find that too touchy for your liking, try out a middle position on the slider.  NOTE: this is different from "Linear Throttle," which changes the accel pedal % to throttle opening % mapping.  Both can be used together, or individually to fit your preference.

Minimum Idle RPM

This flash option raises the idle RPM of your vehicle.  This is useful for 6MT cars with a SMFW (single mass flywheel), as it can reduce or eliminate the chatter.

OEM Catted Downpipe(s)

This flash option should be selected if you still have the OEM downpipe(s) installed.  It removes the logic to suppress the CEL so that the OBD readiness tests can run successfully.

VMax Delete

This flash option removes the speed limiter (typically 155mph).

Exhaust Burble Customization

This flash option delays the fuel cut-off when decelerating or free-revving to induce burbles and crackling in the exhaust.  There are several possible customization options:

• Duration (base): changes the burble duration in efficient mode.  If you don’t want burbles in this mode, set to 0.

• Duration (sport): changes the burble duration in sport/sport+ and dsc off modes.  If you don’t want burbles in these modes, set to 0.

• Aggressiveness: changes how loud / aggressive the burbles are.

• Minimum RPM: changes the min RPM at which burbles will be active.

• Maximum RPM: changes the max RPM at which burbles will be active.  (note: not for N54)

• Minimum Speed: changes the min speed at which burbles will be active.  If you would like burbles in neutral / park, set to 0.  (note: not for N54)

• Maximum Speed: changes the max speed at which burbles will be active.  (note: not for N54)

• Burble in Standstill: N54 specific setting to enable / disable burbles when revving while the vehicle is stopped and in neutral, clutch-in, or in park.

Additionally, when flashing an MHD OTS MultiMap or custom mapswitch tune, we provide adjustable burble duration and aggression per map slot.  This can be seen via Map 1 / 2 / 3 etc “tabs” at the bottom of the flash options screen.  The number of tabs depends on the number of map slots setup in your tune (always 4 for OTS MultiMap).

Cold Start Delete

This flash option prevents the initial ~45 second start-up process with raised idle and timing retard intended to quickly heat the catalytic converters.  Select this option to reduce noise at start-up.

Exhaust Flap Open In Sport

This flash option sets the exhaust flap to always be open in sport mode.

Startup Roar

This flash option adds the initial RPM rev or “roar” like GTS cars upon starting.

OPF Delete

This flash option suppresses the CEL for Euro cars that have switched to an aftermarket exhaust without the OPF filter.

Boost per Gear

This flash option is now utilized for ALL N54 powered cars.  Use this to reduce power output in lower gears to help with traction.  To use, take a log and note the current boost levels in the gears you wish to limit.  Then use the flash option to reduce the boost value for that gear and retest until you are not spinning tires.

Torque per Gear

This flash option uses a torque based strategy to reduce power output in lower gears to help with traction.  100% reflects max power available.  Set it lower to reduce power.

Kickdown Prevention

This flash option prevents the AT / DCT transmission from downshifting when pressing the accelerator pedal 100%.

Shift Bog Fix (Tq Lim 2048 - hard limiter)

This flash option cures the 1-2 second power limitation when shifting fast on 6MT N54 cars, or when utilizing a higher than factory rev limit on AT / DCT N54 cars.  This would commonly be seen in logs as Torque Lim 2048.  This flash option also changes the RPM limiter from a “soft limiter” (throttle closure) to a “hard limiter” (fuel cut).

6MT Launch RPM

This flash option enables a standing rev limiter at a user defined RPM for when the clutch is pressed in at a stop.  This helps to consistently launch your car at the same RPM.  This should be combined with the Shift Bog Fix for best results.

Rev Match Disable

This flash option allows you to disable the “rev match” feature per driving mode (eco/sport/sport+).  This is useful for 6MT drivers that like to rev-match themselves.

T-Map Sensor

This flash option provides support for users who have installed a 3.5 bar (N20) or 4 bar MAP sensor.  These allow the DME to be able to read a wider range of boost pressures.  It DOES NOT increase boost on its own.

Ignition Coils

This flash option provides support for users who have installed a higher performance ignition coil kit, such as Precision Race, BimmerLife or Nexsys Motorsport.

ADV O2 Sensors

This flash option provides support for users who have installed the ADV O2 sensors (typically used for N54 Single Turbo kits).

XDI HPFP

This flash option provides support for users who have installed an XDI HPFP.

Dorch HPFP

This flash option provides support for users who have installed a Dorch Engineering HPFP.

Sport cooling mode for intercooler

This flash option runs the pump for W2A (water to air) intercooler cars more in order to improve cooling of IAT’s, especially useful when sitting in the staging lanes waiting to race.

Motiv FlexFuel Kit

Now that MHD+ is available for N54, the selection of the Motiv FlexFuel kit is done under the MHD+ Suite flash options.  For OTS FlexFuel legacy users of this kit, you will want to select the Motiv FlexFuel kit from the ECA preset drop-down, and then check the FlexFuel checkbox that appears after the ECA selection has been made.

That additional FlexFuel checkbox will only be visible if you have all of the license requirements fulfilled and are flashing an appropriate OTS map.  When selected, it will automatically blend your selected stage pump gas map with the related ethanol map and results in a fully featured TRUE flex fuel setup.  See the Motiv installation guide for additional details.

NOTE: Custom tunes will not see the FlexFuel checkbox option, as it is not necessary, but they will be able to make an ECA preset selection.

Coolant Mode

This flash option changes the oil and coolant temperature targets to give improved cooling during spirited driving or for use in hot climates.

PI Safety (coil cut)

This flash option will cut power to an ignition coil if that cylinder’s fuel injector is cut.  This is necessary for a completely safe PI (port injection) setup.

Wastegate Rattle Fix

This flash option changes the position of the wastegate arms during idle and deceleration in order to reduce the rattle noise they can have as they age.

Desensitize Knock Sensors

This flash option is for professional use only.  It should only be used after validating a built motor has false knock using det-cans or similar.

Flash Counter Reset / Freeze

This flash option will reset your DME flash counter to 1, and also freeze it so that future flashes do not increment it any further.

Overrun BRAP

This flash option will enable the BRAP sound on throttle lift (if sufficient boost has been built), exactly like the M2 N55 and S55 cars have from the factory.  There are two options, short or long duration, which affect the length of the sound.  An aftermarket exhaust is recommended for best sound.  Full factory exhaust on some vehicles may be too quiet to hear the BRAP, especially on 5-series / 6-series vehicles and some SUV’s.

MSA Disable

This flash option allows you to disable the Automatic Motor Start/Stop function.  It affects all drive modes.