 With the elimination of the previous C2 class, it required manufacturers such as Mazda and Porsche to build entirely new engines, and due to the large change in engine dimensions compared to what they had used in 1991, all new chassis as well.Porsche already had an F1 engine in their 3512 unit used by Footwork, but the engine design was found to be lacking.Porsche, suffering financially at the time, decided that it was no longer worth not only improving the 3512, but also replacing the 962 chassis, and decided not to return.