as for the larger nozzle thing....
you get the same fuel in in a shorter time. this is the lower pw, cooler egt's thing. there should be no loss of fuel, unless your nozzle is large enough that you have to pull pw back drastically to maintain rp.
you lose some atomization due to the larger nozzle. lose a tad of quality, but realistically should lose no fuel quantity.
as long as you dial pw back to maintain rail pressure there should be no power loss, due to larger nozzles and stock pumps. the key is maintaining rail pressure.
but, the thing is, is a guy going to larger nozzles on stock pumps for lower egt's, he's not after more power. nor is he probably running at the peak rpm either.
i don't race my truck, don't pull it, it's typically hooked to a trailer, or driving me around looking at jobs. 90% of its driving is on the street, and the rest trying to not get stuck in the field pulling wagons/trailers i probably should not be hooked to in the first place.
larger nozzles in my situation are the ONLY way to go. i don't care about up top, i care about down low, and mid range, which is where larger nozzles and stock pumps shine.
as for elites tests, and their thoughts on nozzles. 99% of their tests are for peak hp, up up top rpm stuff. which if you think about it, is what everyone wants to know, but how often are you in those circumstances in your truck?
ya, you might play in the country every now and then, and to attempt to give that a number, you might use that rpm range, what, 10% at most for a dd?
i prefer to build my truck for the 90% of how i use it. i am totally willing to give up, as elites testing shown, some peak performance for some response. stop and think about it for a minute. how often is your truck over, lets say 32-3500 where that peak performance/ upper rpm's matters?
that's the biggest hang up/mistake i see people making now-a-days. everyone is so hung up on numbers, peak numbers, dyno sheets, graphs, yada yada yada. for a dd, whats it matter what the peak number is? your going to be there so rarely, its a obselete number.
the graph showing the curve, that's a useful piece of paper. as long as it shows me a gain down low or in the midrange, I'm all for it. because that's where i use my truck.
go back in time a tad, i have seen first hand the benefits of larger nozzles on a 7.3. it was night and day. took the tuners a long time to be able to tune for them, as it was so much a new thing, new idea. now there are guys driving smoke free as a daily driver with 400% nozzles.
the problem with the 6.4's isn't the larger nozzles, it's the lack of proper tuning for them.
sorry for the novel.