From next season a system of Compensation Weights will replace the Success Ballast system that has previously adjusted car weights based on driver results. Compensation Weight will balance the performance between car models rather than the difference between the drivers. Therefore all drivers in the same model of car will carry the same weight.
Although results and lap times proved its effectiveness, the Success Ballast system had two weak points, firstly it hid the identification of who really were the best drivers and secondly because of major technical differences between the cars (front or rear-wheel drive, petrol or diesel engine), forced the FIA Touring Car Bureau to issue a number of technical waivers to further balance performance.
Compensation Weight will solve these problems, being an objective system based on models (by homologation number) instead of driver''s results.


Fonte: Media FIA WTCC - 46_WTCC_newsletter_2008.pdf