MINI F56 JCW GP3 — Custom BM3 Tune
Logged, verified, revised. Documented in writing. Yours to keep.
A custom bootmod3 calibration for the F56 JCW GP3 — the third-generation John Cooper Works GP, and its own car. It runs the B48A20E at 301 hp from the factory, not the 228 hp B46A20O1 of the standard JCW, so it gets its own calibration rather than the JCW map. Built from datalogs on your car, not a map off a shelf.
How we approach it
Math first, datalogs second, marketing claims a distant last. We don't publish dyno numbers we can't reproduce; we tune to what your specific car does on the fuel you actually buy.
Pick your stage.
Returning customer? Skip the configurator and order direct. Your tune will be calibrated and emailed once we have your VIN and datalog — we will ask for both after checkout if you do not add them here.
How we calibrate this platform.
Before you tune.
How long until I have a working tune?
4-5 business days from datalog receipt for Stage 1; 7-10 days for Stage 2.
Do I need supporting hardware for Stage 2?
Chargepipe and a fuel system check are recommended. E30 flex requires a flex-fuel kit on chassis that don't ship one factory.
Can I revert to stock for warranty service?
Yes. BM3 supports non-destructive stock revert. Most customers revert before dealer appointments and re-flash after.
What VIN do I enter at checkout?
The 17-character VIN of the car you're tuning. It appears on the driver-side dash, door jamb sticker, and registration.