Remember, I am only talking about those early 3406B nozzles, and very early 3406C nozzles.

 
Not later 3406C nozzles  OR 3406E and C-15 injectors!  There are differences in them and their wear parts/pieces. Thus flow is altered differently and on actual injectors, I've seen it go both ways; increase and decrease, on the exact same injector part number.