8-Speed ZF - Flash Settings
Flash Settings 8-Speed
xHP has “Flash Settings”, allowing the user to change specific settings before flashing an OTS or Custom Map. This injects these user-defined values into each map before it is flashed.
Use is simple:
adjust the desired settings
save the settings
flash any map to apply the settings.
You must flash your car after changing settings. Being connected to the car is not enough.
You can access the module via the “edit” button. right next to “Flash Settings” at the bottom.
Please note that the module is not available for all vehicles and engine/gearbox combinations.
Due to the different generations of transmission controllers used by BMW during production, some cars may not support all existing custom features.
To see what Flash settings your specific car can support, connect the app to your car and click on it. Then click on “FLASH THIS CAR” and then on “Edit” right next to “Flash Settings”.
This can be done without purchasing a licence.
Drag Race Mode
“Drag Race Mode” is designed to squeeze the absolute maximum out of your transmission and improve your 0-60 and 60-120 times! Torque reduction during shifts is entirely disabled, shift pressures are maxed out, and clutch protection thresholds are raised so you can put the full power of your engine to the ground no matter what.
The absence of torque reduction during shifting results in better acceleration times. This is especially true on turbocharged cars, as the engine does not have to reduce boost during the overlap phase of the transmission. To compensate for the additional load on the clutch packs, shifts are made with the maximum possible pressure. The standard safety thresholds for clutch load are increased accordingly.
The 8-speed transmissions use a similar logic in Launch Control mode, but Drag Race mode furthers this idea. Launch Control mode is also internally disabled on some cars after reaching a specific counter. In Drag Race mode, the LC counter is disabled and is permanently available.
Drag Race mode is automatically activated in Launch Control mode and Sport+/DSC OFF mode (8-speed) or Manual mode (6-speed). The increased pressure only becomes noticeable above about 40% throttle. Everyday daily driving in Comfort/D is unaffected.
Please note that this is a real performance feature, causing more wear on your transmission and should not be used permanently.
All our stages are typically developed within the transmission limits to ensure unaffected longevity and stock-like trouble-free operation.
Drag Mode deliberately ignores these limits for maximum performance and should only be used in particular situations, such as drag strip competition! Drag Mode can be applied to any of the stages or even to your stock file.
Custom Launch Control 8-Speed
Launch Control is a 2-step process. It is only activated when your car is in S/Sport+ or S/Traction mode.
Stop your car in a safe, and make sure it is a level and straight road.
Move your gear lever to S and put the car in Traction or Sport+ mode.
Now apply the brake VERY firmly and quickly apply full throttle with the kick-down switch depressed. On cars with LC from the factory, you will see "Launch Control active" on your dashboard.
The amount of boost/torque your car can build up while the brake is depressed is set with the "Set Launch Torque" slider.Release the brakes to launch your car.
After releasing the brake, the car will attempt to manage torque and traction according to programmed presets, which can be adjusted up and down with the "Torque Scaling After Launch" slider.
0% is the factory setting, optimised for stock cars. Tuned cars may require different settings.
Feel free to experiment with these settings to find your personal best.
Override Brake Boost Protection
The ZF6HP and ZF8HP use a torque converter to amplify the torque coming from the engine before it enters the rest of the driveline. This amplification must be considered while brake boosting to protect the transmission and the rest of the driveline.
The typical torque multiplication factor for ZF torque converters during brake boosting is around 1.75 - 1.9. (Engine speed > 800 rpm and turbine speed: 0 rpm).
This makes torque converters great for launching vehicles, but due to the amplification, the allowable torque from the engine needs to be limited. This limit is independent of any other torque limits and is only applied during the boost phase of the converter.
It is hard-coded per transmission variant (6HP21, 6HP28, 8HP45, 8HP50, 8HP75, etc.) and cannot usually be changed by the calibration engineer. There is a good reason for this: even small changes result in substantial torque jumps after the converter.
The override function in xHP has five settings from 5% to 15% to increase the allowable torque, OR you can turn the protection off completely. If OFF is selected, the engine torque is not limited by this particular function but only by the corresponding gear limiter. (Gear 1 or Gear 2)