Did not Porsche stop racing group 5 in late 70's in the 935 Moby Dick cars, while Kremer Bros. and others continued on the project and took the wins for years and beyond. So it seems according to history that Porsche is in another lull. RUF was around back then as they are now but did not get into the fray then, as Kremer and others did. Maybe they will go for racing this time around.