BitBox Slave initial purchace. Includes 1 dongle and subscription for 12 months. Available only for Master dongle owners..
What does this system represent?
If you have multiple branches or regular clients to whom you provide firmware updates, and they are interested in our product, they can obtain all the modules you have, but they will not have access to the firmware, and you will keep the secret of your developments. They will also be able to read and write firmware, but only you will be able to see them, and importantly, only with your permission will a file be recorded. You will also know when a file has been recorded and when it has not.
How does it work?
Any Master (currently a regular key) can be linked to an infinite number of Slave keys.
- You purchase a Slave key and link it to yourself.
- The Slave runs the program, reads the file from the machine in the same mode (even if it is virtual reading), and is offered to send a calibration request - to you. It fills out the form shown in the figure below and sends the file.
- In your Master files window, this request will appear. You can save the file and also upload a modified or original file for writing to your Slave.
- After that, the Slave presses the Write button and selects the file prepared by you from the list and writes it to the machine. After a successful write, the file is marked as used.
- The Slave cannot write the file more than once.
In fact, no file transfer occurs between you and the Slave. All files are stored in a secure storage, and access to it is provided only by your Master key! You do not transfer files to each other and you also know for sure that the Slave has already used the file!
How much does it cost?
One Slave key costs 1500 rubles (50 euros for foreign users) + 10000 rubles (200 euros) for the initial activation with a validity period of 1 year from the moment of activation (subscription mode). Each subsequent year of operation costs 10000 rubles (200 euros) per year.
The Slave has access to all the purchased modules of the Master key and does not require additional payment for module activation. You purchase one Master key with all the necessary modules, and all your Slave keys have access to them!
Attention! The Slave key is purchased, managed, and owned by the Master.
Important:
This function is available only on certain BMW engines and is NOT applicable to other vehicle brands.
The information below applies only to stock engines with factory ECU software and a standard exhaust system.
What This Parameter Actually Represents
This is NOT a direct measurement of fuel octane and is NOT a direct octane reading calculated by the ECU.
The value is an adaptation factor ranging from 0 to 1, where:
- 0 = no correction
- 1 = maximum correction
According to BMW’s internal definition:
Faktor adaptierte Kraftstoffqualität (0 = ROZ98 / 1.0 = ROZ91)
- 0 corresponds to 98 ROZ
- 1.0 corresponds to 91 ROZ
ROZ is the German equivalent of RON (Research Octane Number).
The device converts this multiplier into a more intuitive octane value for user convenience.
⚠️ The device does not measure anything itself.
It only displays the data provided by the engine control unit (ECU).
How the ECU Evaluates Fuel Quality
Each ECU has different calibration sensitivity:
- Sensitivity to the adaptation factor
- Sensitivity of the knock control system
Fuel quality is evaluated subjectively by the ECU, primarily based on:
- Knock ignition timing corrections
- Overall engine noise levels
BMW G-Series & LCI F-Series (B-Engines)
B38 / N63 / S63 / N74
These engines are highly sensitive to octane adaptation.
- During warm-up and cruising, the displayed octane may frequently drop to 95 or lower.
- This does NOT automatically indicate poor fuel quality.
- Under load, the value should increase.
⚠️ If the value continues to decrease under load, this may indicate a problem.
B46 / B48 / B58
These engines have low sensitivity.
- During cruising, octane will typically display maximum values even with mediocre fuel.
- Under load, the value will decrease if fuel quality is truly poor.
S58
Octane correction is virtually inactive.
- It will typically always show 98.
- If it drops below 98, fuel quality is genuinely very poor.
BMW F-Series (Pre-LCI) with N/S Engines
Most pre-LCI F-series ECUs do not calculate octane adaptation.
Do not expect this parameter to function.
S55
- Octane parameter not used by the system
- Display not supported
- However, display of the last 5 refueling quality events is supported
S63
- Octane parameter not used
- Display not supported
- Refueling quality display not supported
BMW E-Series
Octane parameter not available. Display not supported.
Important Notes About Tuned Vehicles
With modified hardware or custom tuning, behavior may vary significantly. Always consult your tuner regarding expected operation.
Key principles:
- If octane drops under load, it means fuel quality is worse than expected under those conditions.
- This does NOT automatically mean the fuel itself is bad.
Examples:
- If a tuner increases ignition timing and boost pressure, even good fuel may cause knock corrections, and the ECU may interpret it as poor fuel.
- Thin-walled or poorly mounted exhaust systems may create parasitic noise, which the ECU may interpret as engine knock, causing negative correction.
- Conversely, if knock sensitivity is reduced or octane correction is disabled in tuning, readings may appear ideal while actual engine safety is compromised.