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Pedal feeling for race cars is a subject of great uncertainties, due to singularities of this type of system and the large amount of components that may influence it. High performance friction materials are developed considering different requirements, aiming to establish a commitment relationship, among different characteristics - for example, compressibility, friction and wear - for critical conditions of use, such as high temperatures and pressure applications. The purpose of this study is to analyze the brake system strain through the fluid displacement measurements and analysis, during brake events, applying different brake pressures for static tests performed on an inertial dynamometer. Test procedures applied aim to simulate automobile race laps, according measurements previously done. Two high performance friction materials, specifically developed for this application, with similar compositions - around 5% different and some physical properties improved - were analyzed.