In this book, we are interested in the design and the implementation of a turbocharged engine test bench working with gas fuel. The main goal is to realize the experiences in order to extract the turbocharger engine characteristics. To do this, we started the work through the development of the appropriate design. After the preparation of the test bench, we have installed all the necessary instruments. With this equipment, we have studied the overall characteristics ofthe engine then we turned to the turbocharger.