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This work presents the experimental determination of an automotive turbocharger flow map, by using a flux test stand. This equipment is able to reproduce and measure the main characteristics of an intake and exhaust flows of an automotive engine. To build the compressor and turbine flow maps, the experimental data should be treated through an empirical model. Flow maps of two turbochargers are presented. The first flow map presented was used to validate the data treating method. The validation process made use of published GT12 Garrett turbocharger data. The data treating method was applied on the experimental dada of T2 Garrett turbocharger obtained on the flux test stand. The flow maps build are shown, and operational limits are identified on then. These flow maps give essential information to choose the most suitable turbocharger for a specific internal combustion engine.