I suppose I should have stated that I have a 2004.5 with an engine nameplate build date of February 11, 2004 noting also 325 HP & injector rate of 129mm^3.
This is important because when I ordered fromBBI there were two options:
1.) MY2003 - 2004.5
2.) 2004.5+
You’ll note that both options are inclusive of the 2004.5 model year truck so I asked which to order. The folks at BBI indicated (via internet chat) the injector style for my engine build date would be the MY2003 - 2004.5 style.
I then assume:
1.) I have the 143 degree nozzles, and
2.) the pistons are the stepped-lip bowl type.
BBI indicated anything built May 2004+ would use the MY04.5+ injector, which I assume is the 124 degree spray angle (non-stepped lip piston).
Martin @BBI, if you’re out there maybe you could chime in and let us know if this is correct.
Based on input from BBI, I orderd the MY2003 - 2004.5 injectors for my 2004.5 truck. When the injectors are removed I’ll scope the cylinders to verify.
Back to the topic of haze/tuning...
Since these injectors are the 143 degree spay pattern and stepped-lip piston bowl (if my assumptions are correct) I’ll report on the issue of haze (this may, or may not, have any effect).
I did notice the discrepancy on the BBI website yesterday. It should read 03-04 and 04.5-07.
There are many ways to tell that you have an 04.5 motor, and not an 04 motor.
1) HE351CW, this was only offered on the 04.5-07
2) 325hp, only offered on 04.5-07
3) Anything built after January 1st 2004 is an 04.5
Your injector rate is different than my 05, which states 132mm3, but that doesn't mean much. Things changed between years and engine calibrations. The important figures are the hp and build date.
There are plenty of folks running the 03-04 injector on the 04.5-07 injector bowl, and some have been doing it for years. I personally am not a fan of it, since the 04.5-07 piston is already a weak link I don't think changing the spray pattern and heat focus is a good idea.
If you stick with the MY03 0.5 injector I am curious as to if it hazes, and how it runs.
You can see in the attachment the piston/spray patter differences.
Hello Eric,
I think i have overread in the chat that you have a 325HP engine....
From the production date I was very sure it has to be a MY03 but those were only available up to 305HP. So you definitely have a MY4.5+ engine then.
The injection rate seemed low to me also, as OEM MY4.5 injectors have 130,3mm³ and the MY03´s have 128mm³ at the full load test point.
So now that we know for sure that you have the MY4.5 piston style you can use both injector types.... do you want to stay with the ordered MY03 Stage 0.5s or should we change it to MY4.5 Stage 0.5s.
I will write you an email also to not loose to much time if you check your emails earlier than that thread.
I want to add some information about that haze topic also....
There are no idle haze differences between Stage 1´s and Stage 0.5s as both have at an idle the exact same injection rate.
We have MY4.5 customers with and without having the haze at an idle (i would say 1 out of 10 costumers recognize a slight haze)...
The problem is that we already made some investigations in those regards and swaped injectors between trucks with and without the haze and the haze stayed with the truck and not with the injectors. Many of those customers also told us that they recognized the haze before with OEM injectors and thought that it will disappear with new injectors.
For that reason I do not think it really is an injector related issue
But using the MY03 injectors has definitely advantages according having an idle haze as the fuel has more time to burn before it has the chance to condensate on the piston wall
As stated above all engines built after January 1st 2004 are 325 04.5 motors. The emissions laws that mandated the change in ratings/emissions went into effect on January 1st 2004.
My experience with customers having 0.5's and haze is quite opposite. It's 100% and something I have not experienced with any other injector. Only once has tuning eliminated the haze, the rest of the time it remains. I have talked with folks, who I haven't tuned for, with 0.5's and they all have haze. Stock or aftermarket tuning. None of it is excessive, but it's always there at idle.
I don't need to get into the specifics of what I think causes it, but I do see a direct correlation to the 0.5 over the 1.0's despite them having the same nozzle.
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