Patent ID: 7437236

Claim:
A method for customizing properties of a drive assembly in motor vehicles comprised of an intake system, an exhaust system, and/or an internal combustion engine, the method comprising: storing mechanical properties of a serial drive assembly in a database; storing engine parameters efficiency and rotational torque in the database; storing acoustic properties of a serial intake and/or exhaust system in the database, each in a frequency field and a time field; construction properties of the serial drive assembly that are customizable are stored in the database; parameters and limitations of variations are stored in the database; after varying at least one construction feature, the resulting modifications of the engine parameters are calculated and stored as a parameter difference and/or the acoustic properties in the frequency field are calculated and are stored as a sound difference in the time field; overwriting original values of the serial drive assembly with the difference values; repeating, if necessary, the steps from varying the construction features to reproducing them; and producing the drive assembly with the modified construction features; wherein the variation of the construction features and the visual and/or acoustic reproduction are realized by data transmission via Internet and/or an Intranet.