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Calibration Revision Cycle

How the JB Remap revision process works — from first flash through datalog review to final sign-off.

Initial Flash and Baseline

After you flash the first calibration file, drive the vehicle through a defined test protocol — typically a mix of city driving, motorway cruising, and one or two wide-open-throttle pulls. This establishes a real-world baseline of how the calibration behaves on your specific vehicle and environment.

Capturing and Submitting Datalogs

Use your logging tool to capture key parameters: boost pressure, knock count, fuel trims, lambda, and charge-air temperature. Save the log and upload it to the portal alongside any notes about driveability — hesitation, surging, or anything that feels unusual. Clear, detailed feedback speeds up the revision process.

Engineer Review and Revision

Our calibration engineer analyses the datalog against the expected targets. Adjustments may include tightening boost control, advancing or retarding timing in specific load cells, or refining the fuelling map. A revised file is uploaded to the portal with a summary of the changes made.

Final Sign-Off

Most calibrations reach their final state within two to three revisions. The final file is archived and linked to your vehicle record so that future updates or stage upgrades can build on the verified baseline rather than starting from scratch.

Related Resources

BMW File Service

Need a Custom BMW Calibration?

Need a revision on your current file? Upload your latest datalog and we will refine the calibration.

Request a Calibration Review

Original ECU File

Read via OBD, Bench or Boot

Vehicle Details

Model, year and specification

Fuel Information

Fuel type and octane rating

ECU Identification

Hardware and software version