I know of several cosworth powered race cars that run Coil on plug systems , whether they have any advantage or not is up to the individual . i dont believe that a roadcar would need them over a wasted spark system , i went this route to avoid the sort of mis fires that Rod mentioned , coupled with spark gap and the right intercooler this is a fantastic system . The one point i can add is that engine and chassis earths are really important for coilpacks , i have a burnt injector and plug to prove that .,
regards
Tony
www.touringcarspares.com