A turbocharger controller includes a turbocharger compressor temperature module having a compressor inlet air temperature input, and a turbocharger compressor pressure module including a compressor inlet pressure input and a compressor outlet pressure input. A memory module includes a compressor outlet temperature calibration map and a compressor pressure ratio look-up table. A turbocharger boost pressure ratio control module is operatively connected to the turbocharger compressor temperature module, the turbocharger compressor pressure module, and the memory module. The turbocharger boost pressure ratio control module is configured to selectively compare compressor outlet pressure and compressor inlet pressure with values in the compressor ratio look-up table to determine a turbocharger boost pressure set point establishing a desired compressor outlet temperature.