[Vwdiesel] Bosch Books

[mark shepherd]

Does the Bosch Automotive Handbook basically cover the "meaning of everything" including that of the book  Diesel Engine Management?
Maybe both books are a little too simple in the area of interest namely diesel nozzles, and their service.
does nowhere in the ether exist a cross-referencing list of nozzles codes v spray pattern? I'm only interested in substitutes for the Golf/Jetta/Quantum era.  I am [slightly] aware of DNS 0 and  DNS 12 mean  0 deg and 12 degree spray angle, but all my DN0 nozzles out of my /Quantums seem to be be at least 10 to 15 deg. Does that mean they are duff? Most reluctant to  buy new when I hear rumours that new are of poorer quality than old....
All advice welcome..
Mark