Audi RS4 and S4 remap

At Manchester Dyno Centre we remap the RS4 and S4 B9 at our Eccles, Manchester facility using the 4WD Bapro dynamometer. Quattro four-wheel drive is standard across both cars, accurate power measurement and calibration on these platforms requires a four-roller setup.

The S4 B9 uses the 3.0-litre TFSI single-turbocharged V6, producing 354 bhp in standard specification. The gap between standard output and what this engine will reliably hold is considerable. Stage 1 calibration takes verified power to approximately 440 bhp, an 86 bhp gain on a car that was already composed and fast.

The S4 is a broader proposition than the RS4, it is bought as a practical estate or saloon that happens to have a V6 petrol, and owners tend to use it for exactly that. Stage 1 remapping preserves all of that usability while adding a level of in-gear performance that makes the car significantly more capable on a motorway overtake or an open road.

Economy and power characteristics improve together at Stage 1 on the S4, the more accurate fuelling and torque delivery across the rev range means the engine is working more efficiently at part-load as well as producing more at full throttle.

The RS4 and S4 are Quattro vehicles. Both axles are driven under normal operating conditions. Measuring or calibrating either car on a two-roller dynamometer means operating the car outside its normal drivetrain configuration, which introduces inaccuracy into both the baseline measurement and the calibration process.

Our 4WD Bapro dynamometer loads all four wheels simultaneously. Every power figure we produce from the RS4 and S4 reflects what the car actually produces through all four wheels in the mode it normally operates. This is the only honest way to work on an AWD platform.