...BTW your Bieber avatar is awesome.-Malone
I mean the IDI engines have about as low tech a nozzle as you can get yet there is still not really any non-VW application that actually works properly with the prechamber design. \As always I'd be tickled pink to find out there us some other option that ACTUALLY works well but I have a feeling it would be just like the CASE / Mercedes nozzles on the IDI engines. Seems like a good idea but doesn't work in practice. Or at least provides negligible gains but lots of smoke and high EGTs.
This is what others have said. There is a part # for the nozzles that gives away the spray pattern. I guess from what some have said the spray pattern for the GM 6.5 is a ton closer to the VW than the Merc. Several on here have stated much more smoke from merc nozzles. I have only ever ran VW.