A new approach towards a model-based optimization of IC engine control on dynamometers is presented in this paper. The proposed methodology comprises advanced measurement strategies for a fast dynamic measurement of engine characteristics on dynamometers (DYNMET), a model-based offline optimization of feedforward control maps (STATOPT), and the optimization of dynamic transitions of turbocharged engines with exhaust gas recirculation (DYNOPT). The respective program packages are being integrated into a MATLAB-Toolbox called OptiMot: optimization of IC motors. This paper shortly reviews the underlying algorithms of the package, such as the design of measurements, the identification of the engine, and the optimization of the static and dynamic engine behavior. Then, the OptiMot toolbox is described in detail in order to give the reader a vivid image of how to use the algorithms by means of a graphical user interface.