sentences:  Tally joined Saleen in 1998 to develop the 7.0L engine that was eventually used to power the Saleen S7.Before becoming CTO at Saleen, Tally had served in the positions of S7 program Chief Engineer, VP of Engineering, and VP of Advanced Engineering.While at Saleen, Tally headed the development of Saleen's Series VI supercharger, a patented supercharger design.