BMW 330e G20: Stage 1 Custom + TCU, 406bhp & 701Nm

This BMW 330e (G20) plug-in hybrid came in for our Stage 1 custom dyno tune and a TCU gearbox calibration for its 8-speed automatic, both developed on the same visit. It pairs BMW’s B48 2.0 turbo petrol with an electric motor.

The numbers

On the baseline run it made 293.6bhp and 436Nm. With our calibration and the TCU gearbox calibration it made 406.6bhp and 701Nm, with 358.0bhp at the wheels. That is 113.0bhp and 265Nm more:

Watch the full dyno run

This is the final pull on our dyno, filmed from behind the car, from the start of the run right through to the end. Tap Sound on to hear it.

More power than a factory M340i

Tuned, this 330e holds over 650Nm from around 2,450 to 3,900rpm and over 600Nm all the way to 4,550rpm, with 200Nm or more extra torque from around 2,350 to 4,150rpm and 100bhp or more extra power from around 2,650rpm right to the top of the stock run. It stays above 400bhp from around 5,150 to 6,250rpm. For reference, BMW’s own M340i (G20) is rated at 374PS (about 369bhp) and 500Nm.

The gearbox, tuned with the engine

The 8-speed automatic’s TCU was calibrated on the same visit and set up to match the extra torque, so the engine and gearbox are calibrated as one package instead of two separate jobs.

Hybrid owners

Please arrive with the battery charged above 50%. A lower charge can reduce the vehicle’s performance and affect the dyno results.

How it was done

Diagnostics and a health check first, then baseline runs on our 4WD linked dyno with live data logging. The engine calibration was built from there with repeated runs, the gearbox was calibrated to match, and the final pulls verified the result. No generic files: a calibration written for this car, proven on our dyno.

Got a 3 Series? See our BMW 3 Series tuning figures and BMW B48 tuning page, check your car’s gains and price, or see the other 330e G20 and the 330e Touring we have tuned.