BMW custom dyno Tuning

Bend Calibration x JMRacing

At JMRacing, we’ve partnered with Bend Calibration to offer custom ECU tuning for BMW’s most capable platforms. Using our Mainline ProHub dyno, we’re able to achieve unmatched precision, consistency, and control throughout the entire tuning process.

Supported engine platforms

N55 – M2, 335i, 435i, etc.

• S55 – M3, M4

• B58 – M240i, 340i, Supra, etc.

• S58 – G80 M3, G82 M4, X3M/X4M

Bend Calibration’s maps are known for their balance of smoothness and exceptional power delivery. This isn’t an off-the-shelf tune; it’s an engineered process that ensures your BMW performs with factory grade refinement and motorsport level performance. Through our partnership, you gain access to their proven expertise, every calibration is developed through data-driven results — not guesswork. We ensure that every parameter of your engine management system is optimized for both performance and reliability. The result is a calibration that feels OEM-smooth yet delivers sharper throttle response, broader torque, and consistent power across the entire RPM range.

Why Hub Dyno Tuning Matters

Our Mainline ProHub dyno offers hub-based load testing, giving us direct and repeatable measurements unaffected by tire slip or roller inconsistencies. This allows for precise control of load, ramp rate, and environmental factors — the same tools used by professional motorsport teams.
Whether you’re dialing in a street-car or a track-focused build with fueling and hardware upgrades, our dyno provides the accuracy needed to extract every bit of performance safely.