This paper presents the systematical approach to generate lab test mode using a brake dynamometer to estimate performance drop of brake pads under the circuit driving condition. AUDI R8 with cast iron disc brake system is used as the reference vehicle. Brake pad performance drop is characterized by driving vehicle on F1 circuit, performing a subjective and objective evaluation of the brake performance, analyzing the evolution of the significant parameters related with brake performance drop. Taking into account all the data and information gathered in vehicle test, a well correlated brake pad lab test mode is developed.