Case study

Audi RS4 B9 Engine Tuning

Audi RS4 B9 Engine ECU Remapping & Tuning

Here at JF Automotive we strive to offer the very best engine and gearbox tuning across the world for as many makes and models as possible. To do this we spend uncountable amount of hours at our research and development facility on the latest vehicles models. This is why we made the decision for the 2018 Audi RS4 B9 as our new development car. We choose this car not just so can offer Audi RS4 B9 engine tuning, but so we can fully understand how this new era of engine management system calculates its data and what affect this has to the engine.

We collected our RS4 B9 from Peterborough Audi (Vindis Group) in March 2018 and immediately strapped it down on our dyno for power testing data logging so we get a bigger picture of what the engine was achieving.

See this great review by Autocar of the Audi RS4 B9

Audi RS4 B9 Stock Results

Audi claim 444BHP and 600Nm out the factory at the crank for this engine and yet the initial dyno runs and data logs revealed that it is actually producing 460BHP and 680Nm torque. This is quite common for a german manufacture and especially Audi to understate their figures by so far. The same goes for the 0-62mph time that we recored of 3.5sec and with Audi claiming 4.1sec! Lets also not forget this engine is produced by Audi and Porsche division together, hence its a stonker of an engine!

We recored the power figures on our Mustang 2000BHP AWD linked dyno which measures a wheel horsepower and torque and then we apply our estimated drivetrain percentage loss to these figures to give us our estimate flywheel power. The 0-62mph times have been recored using the P3 Gauge we installed into the air vent which picks up the speed through the OBD port.

Audi RS4 B9 Engine Tuning Options

To provide a quick, easy and warranty safe tuning option we first developed our plug in tuning module kit for the Audi RS4 B9. This adaptive tuning module kit plugs into various engine sensors like turbo pressure and cam shaft (RPM) so that we can control turbo pressure safely using a custom map that we setup and develop on the module.
We spent around 3-4 weeks of testing on the dyno and on the road for the perfect setup while data logging the engine to maintain manufacture safety levels. The module can also simply be removed and the loom unplugged should you have any warranty issues leaving no trace on the car.

Over the coming months we will produce a direct map to the engine’s Bosch MG ECU, but currently it is in long term development.

Audi RS4 B9 Engine Tuning Tuned Results

520BHP and 775Nm! Enough said.

Ok so that’s the peak numbers we have seen on the dyno using our plug in module kit but we actually pulled the torque back to 750Nm for a smoother drive all round. Data logged and checked for safety the engine is running beautifully and the car drives like a factory finished product. We have driven this for 3000 miles now and its faultless in every sense, the pick up and mid range torque is extraordinary and sure to put a smile on your face with every squirt of the throttle.

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