Quote:
Originally posted by DieselAddict
I tested my old German nozzles tonight and it appears that 4 of them have good spray pattern and 2 have decent pattern. Of the new Turkish nozzles, 4 had good pattern, 1 had decent pattern and 1 had bad pattern, almost a solid stream. So it looks like my 18 year old German nozzles are better than the brand new Turkish ones. Now I just have to decide if I should return all the new nozzles or keep 2 of the good ones to replace the German ones with the "decent" pattern. Any thoughts?
The way I judge the pattern is by looking at the width of the cone. The "decent" ones had a somewhat narrower cone than the "good" ones, but no solid stream like the "bad" one. Is it correct to assume that the wider the cone the better the spray pattern or is there a point of no returns?
Interestingly, the pop pressure does vary with different nozzles. I tested all the old German ones in the same injector and got a variation of up to 14 bar.
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The turk nozzles are likely better than the India ones. One out of about 10 of the India ones are good (though one out of the four that Kamil sent me was good, so that lowers the ratio I suppose.)
What you are looking for is a good cone and fine spray, but also a "clean" pop, not a "long" pop or squirting and no “after squirt”, just a quick on/off. It should have a certain sound to it, hard to describe. The older German nozzles probably "pop" and spray correctly. Most of the ones that I have with worn in nozzle bases (in the area not covered by the heat shield) still pop and spray really nicely.
Anyway, was finally able to take pics of the various nozzles.
Here's an older German one with about 225k miles on it (notice the finely polished actuation angle on the pintle):
Here's a newer style German nozzle (etched, not machined lettering):
Here's a new French made nozzle:
And here's an India made nozzle with about 200miles on it (never sprayed right, removed and re-installed old German nozzles):
Notice on all but the older German one that the actuation surface is roughly machined and there is a step from it to the vertical surface of the tip. Not sure if that is telling, but I do know that when I used polishing compound on that surface of an India made test nozzle, the spray was finer and more consistent, though I wouldn’t suggest doing this on your own injectors, just wanted to see what effect it would have.