M140i — Stage 1 ECU Tune
- 18% power increase to 224kW
- 15% torque increase to 459Nm
- Linearised boost curve from 17 to 19psi for improved traction
- Exhaust burbles and pops
- Enhanced fuel system responsiveness
- Optimized drive-by-wire response
The B58 in the 2016 M140i responds well to software and basic breathing improvements. This Stage 1 file targets the factory ECU with an MST intake and focuses on boost curve linearisation, high pressure fuel pump optimisation, and injector tuning to deliver 224 kW at the wheels—a gain of 34 kW over the factory 190 kW. Torque climbs from 399 Nm to 459 Nm, with boost running 1.31 bar compared to the factory 0.86 bar.
The tune keeps everything on 98 RON and doesn't require any hardware beyond the intake. The emphasis was on delivering a smooth, predictable power curve without the factory's reluctance in the mid-range. Good margins remain for those looking to add a larger intercooler or downpipe later, but the file as supplied is calibrated for this hardware only.
Is this tune safe on the factory high-pressure fuel pump?
Yes. The file includes optimisation of the factory HPFP and injector maps to ensure safe fuel delivery at 224 kW on 98 RON. No pump upgrade is required at this output level.
What's involved in the boost curve linearisation?
The factory boost curve can feel peaky or hesitant. This file smooths the delivery from low to mid-range, making throttle response more predictable and the power easier to manage on the road.
Can I run this file if I only have the tune, no intake?
No. The file is calibrated for the MST intake and the improved airflow it provides. Running it without the intake may cause the engine to run lean or trigger fault codes.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Factory.
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