BMW 435d xDrive Gran Coupé F36: Stage 1 + xHP Stage 3, 389bhp & 775Nm

This BMW 435d xDrive Gran Coupé (F36) came in for our Stage 1 custom dyno tune for the N57 3.0 twin-turbo diesel, with an xHP Stage 3 calibration for its ZF 8-speed automatic, both developed on the same visit.

The numbers

On the baseline run it made 301.6bhp and 615Nm. With our calibration and xHP Stage 3 it made 389.9bhp and 775Nm, with 341.5bhp at the wheels. That is 88.3bhp and 160Nm 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 torque than a BMW X5 M50d

BMW’s own X5 M50d makes 760Nm. Tuned, this 435d holds over 700Nm from around 1,950 to 3,800rpm, where the stock run peaked at 615Nm, with 100Nm or more extra torque from around 2,000rpm right to the top of the stock run and close to 190Nm more in the mid-range. Power stays above 350bhp from around 3,400rpm, with around 100bhp more than standard at 4,000rpm.

The gearbox, tuned with the engine

xHP Stage 3 was flashed into the ZF 8-speed on the same visit. It removes the factory torque limiter and raises line pressure for the extra torque, with quicker shifts in D and harder, faster shifts in Sport and Sport+, so the engine and gearbox are calibrated as one package instead of two separate jobs.

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 flashed with xHP Stage 3, and the final pulls verified the result. No generic files: a calibration written for this car, proven on our dyno.

Got an N57? See our BMW 35d tuning page and BMW 4 Series tuning figures, check your car’s gains and price, or read about the 435d xDrive Coupé and the 640d Gran Coupé we have tuned.