Ok, first a little backstory. My swap was completed in 2013 and between then an 2019 I put 100k miles on the engine. Late that year a slight knocking noise could be detected and it turned much louder and there was definitely a problem. Pulled the engine and did a complete teardown and found a trashed wrist pin bearing in #4. Luckily that was the extent of the damage.
For the rebuild I had somewhat decided to build it back to factory specs. The engine is a CPL 1260 ESN# 44885446. Quickserve called for a 3802249 piston kit (0.50 over) with bare piston 3919044 I ordered a full kit which included PAI pistons. My bores are 0.50 over so the PAI part # is 111313. These are the small bowl pistons. I noticed the difference before they were installed and double cross checked the numbers that they were correct. During the teardown I noticed two of the wrist pins had an internal step on the ID and weighed different than the other two. The engine was a zero hour rebuild when I bought it and I did not make any assumption that the parts in it were correct for the CPL or ESN.
Knowing what I have delved into lately, I kinda wish I had asked a few more questions as it seems like the big bowl are possibly more desirable when i comes to performance and injector flexibility. But alas, they are in and they aren't coming out anytime soon.
So the original injectors worked perfectly fine for the early history of my ownership. I had them tested at the initial build stage. I ran pretty much smoke free but later on they had just a slight haze at full power. I figured this was as good a time as any to put a fresh set of injectors in with the fresh shiny new parts. Again back to quickserve and it called for injector 3802246. So everywhere I looked this had a cross to 3918965. I ended up ordering a set of 6 3918965 injectors off of ebay figuring I would have 4 and 2 for service spares if I needed them. When I went to install these, these injectors had the small nut bodies so my lines didn't fit. I ended up spending another $100 to have my local shop swap the nozzles on the old bodies and reset the pop pressure on them.
So fast forward to current time. I got things back on the road in February and have put about 4k miles on it already. I am not happy with the injectors. They haze at idle, haze under part load and haze at full load. Ive tried more timing and less timing and neither changed anything I am running 2.0mm lift on my VE pump as a base and ran that for many miles. I retarded the timing at least 1/4" so that should be well late enough to spray in the bowl. So I started doing some research. According to what I have found:
The 3918965 should be supplied with a bosch 0 433 175 033 nozzle (cummins 3919093) which is a DSLA 145 P 265. This should be a 6x.0098 (6x.009) (7mm tip). These tips are unmarked chinese specials. On further examination these nozzles only have 5 holes! So now I really wondered what I had. I went to the local guitar shop and picked up some string sets that had .008, .009, .010 and .011 strings. I probed to see what fit and a .010 goes on these nozzles. As best as I can tell these are 5x.010 and 145 deg tips (I measured as best as I could and the trig came out close enough that I feel good about it)
Here is a pic of the new nozzle on the left and my old one on the right.
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Now my old nozzle is a genuine Bosch DSLA 155 P 170. I crossed this through some chinese source website to a 5x.012 155 deg. My 0.011 guitar string goes and I didn't have a 0.012 string to test but I believe it to be the 0.012. So i basically ran 5x.012 with no smoke in a non intercooled engine and was very happy with them. The problem is now, because of my piston choice, I can no longer run them because they are 155 deg and I need to run 145.
So now on to the multiple part question. It seems like the new nozzles are suitable for my pistons and are the size I would likely choose. But they suck. They are smokier and run a bit hotter than what I had before the rebuild
1. I am running the 7mm x 9mm adapter sleeve to install these injectors but the thickness of the "washer" part seemed thick. As in I think the injector is high in the head. Do they make selective thickness adapters like they do for the copper washers? PN and source?
2. I can't find a 145 deg nozzle in 9mm configuration in any cross references. Does anyone know if these exist and if so nozzle part #s in a 5x0.010 (145)(9mm) and a 5x0.012 (145)(9mm)
3. If I can't find some 9mm options I will go with Bosch genuine 7mm. It seems like everyone will sell you injectors for $100 each, but I kinda just need the nozzles. I have not been able to find a good cross ref for 5x.010 or 5x.012 145 deg nozzles. I did find a few on chinese knockoff sites but am going to stay away from these. Anyone have a good xref on nozzle PN.
4) Should I go with the 6x.009?
5) Any other suggestions as to a path to try or to diagnose why I am hazy with these tips?
TLDR my 5x0.010 chinese unmarked nozzles suck and haze and looking for options
For the rebuild I had somewhat decided to build it back to factory specs. The engine is a CPL 1260 ESN# 44885446. Quickserve called for a 3802249 piston kit (0.50 over) with bare piston 3919044 I ordered a full kit which included PAI pistons. My bores are 0.50 over so the PAI part # is 111313. These are the small bowl pistons. I noticed the difference before they were installed and double cross checked the numbers that they were correct. During the teardown I noticed two of the wrist pins had an internal step on the ID and weighed different than the other two. The engine was a zero hour rebuild when I bought it and I did not make any assumption that the parts in it were correct for the CPL or ESN.
Knowing what I have delved into lately, I kinda wish I had asked a few more questions as it seems like the big bowl are possibly more desirable when i comes to performance and injector flexibility. But alas, they are in and they aren't coming out anytime soon.
So the original injectors worked perfectly fine for the early history of my ownership. I had them tested at the initial build stage. I ran pretty much smoke free but later on they had just a slight haze at full power. I figured this was as good a time as any to put a fresh set of injectors in with the fresh shiny new parts. Again back to quickserve and it called for injector 3802246. So everywhere I looked this had a cross to 3918965. I ended up ordering a set of 6 3918965 injectors off of ebay figuring I would have 4 and 2 for service spares if I needed them. When I went to install these, these injectors had the small nut bodies so my lines didn't fit. I ended up spending another $100 to have my local shop swap the nozzles on the old bodies and reset the pop pressure on them.
So fast forward to current time. I got things back on the road in February and have put about 4k miles on it already. I am not happy with the injectors. They haze at idle, haze under part load and haze at full load. Ive tried more timing and less timing and neither changed anything I am running 2.0mm lift on my VE pump as a base and ran that for many miles. I retarded the timing at least 1/4" so that should be well late enough to spray in the bowl. So I started doing some research. According to what I have found:
The 3918965 should be supplied with a bosch 0 433 175 033 nozzle (cummins 3919093) which is a DSLA 145 P 265. This should be a 6x.0098 (6x.009) (7mm tip). These tips are unmarked chinese specials. On further examination these nozzles only have 5 holes! So now I really wondered what I had. I went to the local guitar shop and picked up some string sets that had .008, .009, .010 and .011 strings. I probed to see what fit and a .010 goes on these nozzles. As best as I can tell these are 5x.010 and 145 deg tips (I measured as best as I could and the trig came out close enough that I feel good about it)
Here is a pic of the new nozzle on the left and my old one on the right.
Now my old nozzle is a genuine Bosch DSLA 155 P 170. I crossed this through some chinese source website to a 5x.012 155 deg. My 0.011 guitar string goes and I didn't have a 0.012 string to test but I believe it to be the 0.012. So i basically ran 5x.012 with no smoke in a non intercooled engine and was very happy with them. The problem is now, because of my piston choice, I can no longer run them because they are 155 deg and I need to run 145.
So now on to the multiple part question. It seems like the new nozzles are suitable for my pistons and are the size I would likely choose. But they suck. They are smokier and run a bit hotter than what I had before the rebuild
1. I am running the 7mm x 9mm adapter sleeve to install these injectors but the thickness of the "washer" part seemed thick. As in I think the injector is high in the head. Do they make selective thickness adapters like they do for the copper washers? PN and source?
2. I can't find a 145 deg nozzle in 9mm configuration in any cross references. Does anyone know if these exist and if so nozzle part #s in a 5x0.010 (145)(9mm) and a 5x0.012 (145)(9mm)
3. If I can't find some 9mm options I will go with Bosch genuine 7mm. It seems like everyone will sell you injectors for $100 each, but I kinda just need the nozzles. I have not been able to find a good cross ref for 5x.010 or 5x.012 145 deg nozzles. I did find a few on chinese knockoff sites but am going to stay away from these. Anyone have a good xref on nozzle PN.
4) Should I go with the 6x.009?
5) Any other suggestions as to a path to try or to diagnose why I am hazy with these tips?
TLDR my 5x0.010 chinese unmarked nozzles suck and haze and looking for options
