Has anyone tried injector nozzels. I guess they can simply install to replace the stock ones?
Are there any pros or cons compared to buying the whole injector? They are only about 1/3 the price of whole injectors. There on EBay.


http://cgi.ebay.com/ebaymotors/ws/eB...951386536&rd=1

 

I just found some answers.

https://www.dieseltruckresource.com/...jector+nozzels

 

Those tips work fine.
They are Jammer tips from Diesel Dynamics. Top notch stuff.

I know of a couple trucks running them without a hitch.
Cheap to boot!

 

There is not a darn thing wrong with them.

BUT... want to do it even cheaper??? Call up Jegs 1-800-345-4545. Ask them to get you a price on BD Performance injector nozzles only. The Jegs catalog doesn’t list nozzles only, just injectors, but they can get em for u. They have four stages and they are ALL EDM.. Yes that’s right, the nozzles are EDM'd. I bought the stage 4 ( BD XXXX pulse, +155HP) for a price you would not believe. I don’t think you are allowed to quote prices on here, but I can say they are cheaper than that Ebay guy even. Let just say they are 1/4th the price of stage 4 EDM injectors from some popular folks. And you are buying from Jegs which is an absolutely enormous aftermarket retailer, and from BD.

As far as how hard it is to install them.... Its a joke.... Its so easy you would not believe. Uncsrew the nut holding the nozzle and pintle in, remove the nozzle and pintle, install the new nozzle and pintle, and tighten the nut. Done. Literally 2 minutes per injector (once the injector is out of the engine) Just make sure you work CLEAN. On my workbench I laid out some white paper I had on a roll, and used latex gloves and a hair cap too . Yes I looked silly, but you can't be too clean when working with injectors.

Bottom line, I got six +155 HP EDM injectors for less than half the price of a FASS......






Kevin

 

Good stuff,

Nozzels seem like the way to go, for the price. I will try jegs, I just dont want any that someone has drilled out them self.

 

There not drilled.

 

The past two years I have taken in nearly 700 sets of cores. I disassemble these things on a daily basis.

I get cores with as little as 10,000 miles with internal troubles that should be addressed. At 50,000 miles most of the internal parts are eroded away from high pressure leakage betwen the main nozzle holder and the intermediate plate. I see the intermediate plate eroded so bad on most of these that the injectors are working about half their efficiency.

The nozzle holder springs are fatigued and either need to the reshimed or have the springs replaced altogether. Installing a brand new nozzle on these things would lead to fast failures and more headaches down the road IMO. Machining tolerances are not tight enough with Bosch nozzle holders and cheap replacement nozzle to just stick the new nozzle on and go. Yes, they will run, but certainly not optimally.

If you can buy a set of nozzles for 200 dollars...ask yourself how much worth you have left after Jegs, the original selling company and the third world manufacturing company makes their profit. IMO an expensive and high quality engine like the Cummins deserves a high quality injector to go back in.

Don~

 

I agree with don M.

 

The intermediate plates on mine ( 77,000 miles) showed no signs whatsoever or leakage or erosion. If you are concerned about fatigued springs, have your set tested for popoff at your local diesel shop before you swap the nozzles.

The surface finish on the flat mating face of the nozzle was absoluletly perfect, ground every bit as smoothground and lapped surfaces that must seal all the time, I blued the intermediate plate and the nozzle mating surface and checked each one and the pattern made was perfect in every one.


I do feel I put a high quality injector in my engine, I just didn't overpay for it.


Kevin

 

Yeah Kevin,
Why overpay?

 

Maybe I am mistaken, but I think I recall something being said about having the injectors flow matched. To me it makes since that you would want them all matched so that each cylinder is doing an equal amount of work. I am not sure if Diesel Dynamics, F1 Diesel, BD, or any fo the others do this, but if it is important, it is something to think about. I am sure someone more knowledgeable or technically adept than my self will have some comments on this.

Michael

 

Just looking a JEGS, and there BD injectors sure seem reasonable. So like posted earlier, the BD nozzels are probably pretty cheap. I'm gonna call JEGS tommorow. Some 110hp nozzels would sure make my day.

 

https://www.dieseltruckresource.com/...threadid=58635

I "think" all the jammers have the problems sorted out with quality control.

Myself and kdawg have done a little testing with flow rates and pop off pressures.

When a set of injectors come in they are disassembled cleaned checked then reassembled with the edm nozzles and pop pressure set.

But remember what Don says...

If flow rates have little to do with the HP then why did the early injectors have a rough idle problem??? Because one injector would low 35 LPM and one would flow 53LPM.

You don’t see firemen using garden hoses with "trick" spray patterns to put out fires...

O ya, on the worn out injectors. Are you sure people aren't sending you in extrude hone cores??? Wouldn't that explain the extra wear from the abrasive clay be pushed through the injector???


Edited for my lack of spelling.

 

I can take two nozzles with a different design, even though they both have the same flow rate and make different HP. A static flow rate machine is nice, but only gives you a static number. Discharge curve characteristics are another thing. Spray angle plays a part as well. When we began the lower HP EDM injectors 3 years ago we would see the flow rates between cylinders making the dyno curves look very poor. Jagged.

Remember we were the first to ever have an EDM injector below the 100 HP level. The first to ever flow match these nozzles as well. Everyone else was reactive.

Rough idle is generally a nozzle defect trouble if the pop pressure is correct. It can be from a flow rate trouble if the variance is far enough off though.

The wear I am speaking about is a common problem in the 24 valve VP engines. It takes place between the layers inside the injector. The high injection pressure causes small leaks between the nozzle and the intermediate plate, the intermediate plate and the nozzle holder, or both. This wear can also come from high pressure leakage between the nozzles needle and the nozzle itself. The fuel is actually pushed out between the two parts toward the rear of the nozzle. You will see the erosion in that area in nearly all stock injectors that have a fair amount of mileage on them. Most of the 24 valves in existance now have enough miles on them to have this erosion. It is rather small damage when looking quickly at the components but I have seen an 1/8" groove cut into the components in some cases.

Clues to the wear are a starburst pattern on the top side of the intermediate plate. In the area where the nozzles needle is stopped in its lift. From there it can progress into the nozzles feed hole area. Once it is cut through...the injection pressure will drop on each injection event. Lower EGT , low power and and poor idle quality will result. Fuel economy drops off too. You still get injection pressure...just not all of it. At this time I throw away over 50% of the used intermediate plates I get as cores. Most of the core injectors I get are from CTD owners on the DTR, TDR and the internet. Most dont have high mileage. The damage does not even have to be very easily seen. Microscopic grooves will leak pressure easily at 1400 bar plus.

As little as .001" of wear can change a pop pressure value. I can move the pressure by hundreds of PSI with .002" of shim height. Not every nozzle is built close enough in tolerance to just change the nozzles without resetting the pressure. At least not in my book.

Don~

 

I don't care how much they cost but I will definately be going with a set of Don's injectors when my time comes. After seeing how they run in my roommates truck and reading don's post, I've come to the conclusion that his are the best. I mean come on, if your sinking money into a clutch/tranny, turbo(s), box(s), and head work, why skimp on the injectors. At least with don's you know that everything is going to work at 100% of it's capability right off the bat.