Well..., the 273 is not a cross-drilled nozzle, so it doesn't have as much of a dispursed spray as the 240/ nozzle. The 273 will work, for sure, but will likely be noisier and smoke more.

The VW nozzles are like the later MB IDI nozzles (265) with just a long pintle meant to "straighten out" the flow. The 193 and 293 are just flow changes, they look very similar.

I dont mind a slight loss in power in exchange for a reduction in noise,and an increase in MPG, but ultimately I want to have durability and smooth trouble free opperation from whatever injectors I get.

Tom,
Thanks for sharing your insight regarding nozzle types with the group. I've never been able to find a chart that listed the various nozzle types and their flow ratings. Have you been able to decipher what the flow ratings are for the nozzzles that fit our holders? Could you post a little list?

What I have is just from experience, but I have contacted Bosch a number of times to get just such a list and they are pretty tight lipped about it.

I'll try to contact them again next week and see if I can get a real chart or something that will display all the flows for the nozzle types that will retro to these bodies.

Asked them about the tips for Cummins injectors a while back too and they were not very helpful.

Tom, let me know when mine will be ready so that I can paypal a payment and send the exachange injectors I have. THX Chris

Again, do you want the stock nozzles, or try the 240/ nozzles?

LMK as that will affect when you get them.

I think the 240's will be fine. As I stated in a previous post, I do not mind trading a little power for more mpg and quieter operation. I want whatever will be most durable and long lasting. If the 240's are the same or better in smoothness, durability and reliability between the two, then the 240's are A-OK with me.

I suppose that's one advantage the 265 nozzles have over the 240/... no holes to be plugged. Why do you think the French and Indian nozzles plug the holes easier than the German ones? The holes should be identical and they can only get plugged in 2 ways, either from some kind of contamination that has entered the injector, or from carbon that's produced as a result of poor combustion, most likely due to a bad spray pattern. So I would say if a nozzle sprays properly to begin with, it has an equal chance of getting plugged regardless of where it's made. I'm not disputing your observation, just suggesting there may be other variables at play.

It's not plugging of holes that is the issue. It's the way they spray when they've worn-in a bit. I believe there is a concentricity issue with the angles of the pintle, but don't have an optical comparitor to prove it.

One I do know from microscope observation is that the German nozzles (as new) have all the angles polished, whereas the India ones have rough machining on many of them (there are pics on another thread regarding nozzles that shows this.)

Injector knowledgable people looking at this thread, would you please take a look over at this injector thread . Would certainly appreciate it.

Some info in this thread has help me.

could a machine shop Polish these non german nozzles before we install them?

Yes, but it would require hydraulic or electro-polishing and by the time you're done, you'll have $200 into one nozzle.

Since I'm in Diesel Fuels class at DADC, I brought in my old nozzles from the 240D to see what was going on.

None had any needle valve chatter, they all had VERY different spray patterns, one had valve seat leakage, all had backleakage of 2-3 drops per 5 seconds, and only one had a good 30* (est) spray pattern.

Even different pop pressures:
115bar spec.
1:122
2:117
3:119
4:114

The engine only had 195K miles on it with all cylinders below 255psi compression. Mabye the 200K mile change schedule is too high? Or mabye they just kept getting cr@ppy fuel and killed it with contaminants and dribble. :confused:

That's unusual to have HIGH pop pressures? More like someone installed nozzles at some point and didn't know what they were doing, or maybe a typical shop "balanced" them to factory spec (+/- 5bar)

One thing to check, are the pintles the cross-drilled style (240/ nozzles) or the older solid (long) pintle?

I just pulled them apart, it looks like the pintle is solid.

Here are the numbers:
Nozzle body: KCA30535/4 042 115bar
Pintle body: DN 0 SD 240 (I'd guess that's the 240/ you have been talking about but I have no way to know with this being my first MB nozzle apart.)

I unofficialy donated them to DADC but it's not too late if you want them (No students have touched them yet.)