merc nozzles are thought to inject more fuel.They will fit into your injector bodies.they come from the older mercedes (300d).
I've heard people speculate that these nozzles may be a root cause of swirl chambers falling out of heads. I've also read where people are making nearly 200HP w/ GTD nozzles, and modified pumps. If it were me, I'd see how far these two mods took me before installing the Mercedes nozzles and their potential problems. Just be careful.
Mercedez nozzles were developed to smoothen out the rough idleof the 5 cylinder enginethey have a stream of fuel that is not atomized as a pre-injectionthis would not be very good in VW'sGiles
Does any one know a site that sells an assortment of nozzles, I know that the GM nozzles fit too, more fuel yet? Also where do i get the shims to set the pop pressure? And last is there someone that I can send my injectors to, to be pop tested for a reasonable price, local guys in my area are expensive.Thanks a bunch-Chris