Mini Countryman JCW remap

300 to 306 bhp from the factory, developed further by a Stage 1 calibration built and verified on our 4WD Bapro dyno at Eccles. B48 2.0-litre turbo, ALL4 all-wheel drive standard. Call 0161 302 5117 to discuss your Countryman JCW.

4WD Bapro dyno Every map verified against real power figures
Samuel Gunnell 10+ years of experience
Kess3 and CMD OBD port and bench tuning
6,000 sq ft workshop Eccles, Manchester

Mini Countryman JCW power figures

| Stage | BHP | Torque | Notes | |–-|–-|–-|–-| | Stock | 300 to 306 bhp | 400 Nm | B48 2.0 turbo, ALL4 AWD | | Stage 1 | | | Software only, no hardware changes |

The Countryman JCW is the largest application of the B48 in Mini's range, and it carries the same turbocharged four-cylinder found in the Clubman JCW and the smaller Mini Cooper S, tuned to a higher state in this application. The figures above are not lifted from a forum thread. They are what your specific car produces on our 4WD Bapro dynamometer, measured through all four wheels the way ALL4 actually delivers drive, not estimated from a two-roller pull with an axle disconnected.

Mini Countryman John Cooper Works (F60)
Tuner working on a calibration across two monitors

What the gain feels like

The B48 in JCW specification already has a strong mid-range from the factory, and a properly developed Stage 1 map sharpens that further rather than simply chasing a peak number. Throttle response improves noticeably from low revs, the turbo spools with less lag, and the Countryman pulls harder out of a slow corner in third gear where the factory calibration is at its most conservative. This is a car most owners drive daily, so the gain is built to be usable across the rev range, not a number that only shows up at the top end.

Beyond the Stage 1 map

Stage 1 software is where most Countryman JCW owners stop, but it is not the only work available. Where the car runs the automatic transmission, we recalibrate the gearbox alongside the engine to sharpen shift speed and bring torque management in line with the new output. Launch control coding is available on cars specified with it from the factory. A standalone rolling road session, without any remap attached, is available for owners who simply want a verified figure. Economy remapping is worth discussing if smoother, more efficient everyday driving matters more than outright power. Stage 2 is available where the supporting hardware is fitted, call to talk through what your car currently has.

Cutaway of an automatic gearbox showing the clutch packs
Exhaust flames on the overrun at night

Dyno proof for this platform

ALL4 sends drive predominantly to the front axle under normal conditions, with the rear engaging through an electro-hydraulic clutch pack when the system detects slip or load. A two-roller dyno cannot load that split accurately, it either isolates one axle or forces the car into a test mode it was never built to run in. Our 4WD Bapro dynamometer drives all four wheels independently, replicating how the Countryman JCW actually sends power to the road, so the figures in the table above are measured, not modelled.

Frequently asked questions

Are these power figures guaranteed on my car?
The figures shown are typical for a well-maintained B48 Countryman JCW, but every calibration is developed from your car's own baseline pull. Condition, mileage, fuel quality and any prior modifications all affect the exact result, which is why we measure your specific car rather than quoting a fixed number for every one.
What affects the exact gain I'll see on my Countryman JCW?
Fuel quality, the condition of the turbo and supporting hardware, and whether the car has any existing wear all play a part. A car that has been well serviced typically responds more consistently to a Stage 1 calibration than one with deferred maintenance.
Do you provide a printout of before-and-after figures?
Yes. Every session includes a baseline pull and a verification pull on the same rollers, and you leave with the dyno trace showing both, so the improvement is documented rather than described.
What fuel does the Countryman JCW need after remapping?
A Stage 1 calibration on the B48 is developed around UK supermarket premium unleaded (97 to 99 RON). We will confirm the exact fuel requirement for your specific map when the calibration is finalised.
Is Stage 2 worth it over Stage 1 on a Countryman JCW?
For most road-driven Countryman JCWs, Stage 1 delivers the meaningful gain without any hardware outlay. Stage 2 is worth discussing if you already run supporting hardware such as an upgraded intercooler or downpipe, or plan to. We will advise honestly rather than push it where it is not warranted.

Get your Mini Countryman JCW on the dyno. Contact us for a quote and we will find a date at our Eccles facility. Call 0161 302 5117 or reach us through the contact form. We are based at HNA Facilities, Plot Zero, James Nasmyth Way, Eccles, Manchester M30 0SF.

Kess3 OBD and bench programming kit in its case