Well I got the correct nozzles installed on my truck and it smokes like a locomotive!

The wrong nozzles (ISBE50) were giving me 20+mpg on hwy/ 17.5 city. Truck ran very well on Smarty Jr economy and even better on SW2 with a little smoke but none compared to what it is now. The new recommended nozzles saw my mileage decrease quite a bit to around 14 in town and 15-16 on hwy all hand calculated.

So then I figure it's time to update the old smarty since the 04.5 tends to smoke a tad. I had version 5.03D and it was working OK so I didn't update it. So we did the updates and guess what the smoke dropped off to less than 1/4 of what it was to in many cases to nothing at all most of the time. The new nozzles were putting out a steady stream of black smoke while just barely touching the pedal at 30-50MPH in SW1 or slighly less on stock (haze) before the update.

Guess what using the torque and timing settings made a pretty big difference too so I highly recommend using them to those on fence. I'm just getting started but on SW1 I saw my mileage come up by adjusting the timing levels and torque and all levels had less smoke after the update. Right now I'm on SW1 torque 3 and timing on 4 and my mileage today was right about 18.00 Hwy compared to 16 old program with new nozzles. It's going to take a little time to get it dialed in but one can only wonder about what made the wrong nozzles so efficient with good temps to boot with fewer tuning options.

One things for certain the Smarty JR made a huge difference with the new nozzles but hopefully we can get the truck running as smoothly with as good of mileage as the ISBE nozzles in time.

 

Glad to see your on the right path!

 

Whats the scoop on the wrong nozzles? 03-04 style?

 

That's correct they installed the DDP isbe 50's for the 03/04, looking at the production date of the truck. I don't have that valve cover overlay with the 325/ 600 on it that the later models had.

Those nozzles made the engine run smooth as silk and had plenty of power and excellent mileage but wrong spray angle and could cause issues on down the road. For some reason those nozzles were the bomb. Instant mileage improvement and old smarty program worked fine.

I 'm kind of curious how the wrong item worked so well but the new one requires more tinkering when they both should be better in their intended application.

 

You stated in your earlier post, that you did have a 325 engine......... and Dynomite Diesel sold/sent/installed tips for a 305??? It is what started the whole debacle.

Now you do not have the valve cover that states "325", and you may have a "305"?

God Bless You... but you are starting to remind me of my children...

So now, after all the debate, you may have a 305/555 after all?

 

Man, I thought you were talking about 325 hp injectors! I was like, dang, those are BIG!

 

Shoot a picture of your engine compartment, mainly the fan cowl area and post it up...

 

If the build date is after 1 Jan 04, it is an 04.5. The engine sticker on the side of the valve cover should tell you.

 

Hey Skeetsbo, Take it easy, I am really not trying to rip on you, even though I did. Sorry .

I hate to think, now you do have the wrong injector tips. The most important thing is, let's figure out what engine model you actually have. Give us your VIN.

Let's go from there.

 

For those in "wonder" this is how this started.
https://www.dieseltruckresource.com/....html?t=272972

 

thought the same thing mad!

 

JJ & others I have the 325HP engine verified by the sticker on my block and 01/04 production date on door. The shop that installed the nozzles had both types in stock. My overlay on the valve cover doesn't have the 325/600 emblem. The shop went by the production date of the truck and the instructions from Dynomite were a little vague. So that's how it happened initially. When I picked up my truck I noticed on the invoice & box that the nozzles were ISBE 50's for 03-04 Dodge not for an 04.5-07 Dodge.

I asked them about it and they said they had talked with DDP and they were the right nozzles. That's what led to my initial post about the issue because things werre a little vague. The shop verified that they in fact did install the wrong nozzles and then went ahead and installed the right ones at no charge. That gets us to where we are today with my part 2.

The wrong nozzles were working very well with the engine and it was getting fantastic mileage and running like a top. BUT>>> they weren't meant for that engine and the mileage tanked with the new CORRECT nozzles and the truck was smoking like a freight train. I updated the smarty JR and that's where we are today and things are getting better as i adjust thru the settings. BUT I just put in SW1 before and let me tell you the truck loved SW2 with the wrong nozzles and ran like a top and got excellent mileage to boot.

It aroused my curiousity because the wrong ones worked so well with and the CORRECT nozzles aren't duplicating the performance with all the timing variations YET and in many cases it's not even close. That's where we are today. Things are moving in a positive manner but it didn't matter before and it's an issue now. It would seem to me that somethings crazy in all this. That's why I posted this up as an FYI and for input. Believe me I've wondered if I may have the other pistons and /or engine for it to work that well. This should clarify things a bit. thanks MY VIN # is 3D7LU38C94G182158

 

The 03-03 nozzles are 8 smaller holes so it effectively is delivering better atomized fuel in a broader range. Since the pressure is higher on a 600 engine it helps atomization even more. I think they deliver slightly less fuel in that configuration which would track with the mileage gain.

The spray angle is wider on the early nozzles and that may be an issue if the bowl is not wide enough to contain fuel. Not sure on the bowl measurements but if the angle is too wide with advanced timing it will slop out of the bowl and cause issues.

The 03-04 bowls are also re-entrant to roll the air back off the lip and contain the combustion charge in the center where the 04.5+ bowls are not and rely on a narrower spray angle and keeping the fuel in the bowl with angle and timing.

As for the effects, that varies by use. Probably the only way to tell is run with the 03-04 nozzles for a while then pull the head or use a boroscope and look at the spray patterns to see what is happening.

 

oh no thanks, that is my understanding (limited) after being educated by the membership here on my earlier thread. I was just more than a little amazed by the difference in the 2 nozzles. While some of us want maximum performance others are looking for the ultimate blend between the two and I thought I had found it only to find it was bad for my engine.

 

Don't recall where I got this.