A method for logging the performance of a vehicle suspension system by testing dynamic performance of at least one vehicle suspension system component, the method including the steps of: a. measuring the dynamic excursion of mass of an impulsive load with an electronic weighing system in response to a unit impulsive load, wherein the electronic weighing system is mounted onboard the vehicle and monitors the at least one suspension system component; wherein the electronic weighing system mounted on board the vehicle includes at least one load measuring element associated with one or more vehicle suspension system components, and an electronic data log to receive information from all load measuring elements on the vehicle, and; b. measuring an oscillation frequency of said at least one vehicle suspension system component in response to said unit impulsive load; c. determining the damping ratio of the at least one vehicle suspension system component using the measured dynamic excursion of mass, and the measured maximum oscillation frequency of the at least one vehicle suspension system component; d. logging, with the electronic data log, the performance of the vehicle suspension system over a known road section; and e. comparing the dynamic excursion of mass of an impulsive load from each load measuring element; wherein the electronic data log includes a timepiece having time and date, and stores all information from the electronic weighing system in a raw form with electronic time stamp, and stores all information from the electronic weighing system in a raw form with corresponding timestamp, and wherein the electronic data log records an initial calibration timestamp with corresponding time identifier at the initialization of the electronic weighing system; wherein the electronic data log updates or records the timestamp in the electronic data log against the corresponding raw data using the date and time information from the timepiece; characterized in that the time identifier stored in the raw data only increments numerically upon a change being made, the change being selected from a) any change in the system date and time, and b) any change in the calibration information. a. measuring the dynamic excursion of mass of an impulsive load with an electronic weighing system in response to a unit impulsive load, wherein the electronic weighing system is mounted onboard the vehicle and monitors the at least one suspension system component; wherein the electronic weighing system mounted on board the vehicle includes at least one load measuring element associated with one or more vehicle suspension system components, and an electronic data log to receive information from all load measuring elements on the vehicle, and; b. measuring an oscillation frequency of said at least one vehicle suspension system component in response to said unit impulsive load; c. determining the damping ratio of the at least one vehicle suspension system component using the measured dynamic excursion of mass, and the measured maximum oscillation frequency of the at least one vehicle suspension system component; d. logging, with the electronic data log, the performance of the vehicle suspension system over a known road section; and e. comparing the dynamic excursion of mass of an impulsive load from each load measuring element;