6.7 injectors into a 5.9 head?

J.Keith said:
It's in the shop now. Head's coming off thursday and we'll see what happened.
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I can tell you already what happened......

The hold downs for the injectors bottom out under the bolts and need to be machined down for clearance.

The injectors were not held down properly, and in that case backflow fuel from the injectors could get past the copper washers and there's your runaway.

The engine stopped once the backflow was burned up.

So you can thank the one who told you you don't need to clearance those hold downs.........:kick:
 
StainlessRRA said:
Do not run these injectors until I figure out just why my motor melted down. It ran away on start up and now has no compression.
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To add salt to the wound pretty sure its not going to fire those injectors anyways....

I swapped one in tonight (along with modifying the hold down) and NO JOY.

I think Zack's full of chit, the current profile of the CRIN3's has to be quite a bit higher.
 
There was alot of fuel sitting in the bowls, alot. We're still really confused but I'll keep you up dated.

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Anyone ever have success with this? If so what exactly needs done, machine work, electronics, hold downs,, etc... thanks
 
I'm running the 6.7 injectors, however with a stand alone ecu.

The factory ecu will not run my injectors but they have different nozzles that significantly change the energization times.

I really doubt even a stock 6.7 injector will work with the stock ecu. The energization current profile is way different for the new injectors.

Call up Zach, he said he's done it.
 
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Hey Joesixpack im looking at putting 6.7l injectors as well in my 05 head and was wondering how they are running for you? Are they worth the upgrade? I will be running a stand alone ecm as well.
 
maddog_madden said:
Hey Joesixpack im looking at putting 6.7l injectors as well in my 05 head and was wondering how they are running for you? Are they worth the upgrade? I will be running a stand alone ecm as well.
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I love the set I have, they work great and the injection pattern matches the bowls nice, (Earlier monotherms).

Only way to go if you want to really push the pressure and they are built to stand it.

Only bad the stock ecu's will not run them, at least in my experience.

The 04.5 injector 124 degree, will work but its not the best for the early monotherm bowls, they like a 146 or about.
 
They are the CRIN3 generation, and from the get go are rated for higher pressure. After a direct swap (and ecu calibration) they "switch" so much better at the high pressures. I can idle at 30,000 psi and get a perfect idle, nice sound and sharp timing. (I don't idle there, just was interested to see)

Try that with the older CRIN1.6's sounds like a rod is going to come out of the block, timing changes so much with pressure on these it isn't even funny.
 
Joesixpack said:
They are the CRIN3 generation, and from the get go are rated for higher pressure. After a direct swap (and ecu calibration) they "switch" so much better at the high pressures. I can idle at 30,000 psi and get a perfect idle, nice sound and sharp timing. (I don't idle there, just was interested to see)

Try that with the older CRIN1.6's sounds like a rod is going to come out of the block, timing changes so much with pressure on these it isn't even funny.
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Perfrect, Thats what i thought your reasoning was for doing this. You are exactly on target!! Way back in 2006 i was telling guys about the negative effects of high RP and what it does to the accual injection timing of the fuel, yea i got slamed by just about everyone for that kind of talk....:hehe:

Nice to see that you can utilize a faster/ more accurate injector with your new SA ECU. The nira sounds sweet!!
 
I tried 6.7 injs in my 05 and while it did run it did not run right, rough idle and lots of white smoke. So they will not work on a 5.9 ecm. I do however run them with the Zuess on teh pullin truck and they work really well, handle a crap ton of pressure and are faster then standard 5.9 injs.
 
I have a set of low mileage stock 6.7 injectors for anyone looking to swap them in and run a standalone (PM me if you are interested). I bought some 90 hp tips and had my 5.9 injectors checked out to use in my 6.7 instead.
 
So in reverse(putting vp44 style injectors into a 6.7 head) the hold downs would have to be modified so they will clamp the injector down without bottoming out the clamp?
 
I did finally get my 6.7 injectors pulled out, and some 5.9 injectors installed. still have a few more things to finish up before firing it up though.
 
Joesixpack said:
I'm running the 6.7 injectors, however with a stand alone ecu.

The factory ecu will not run my injectors but they have different nozzles that significantly change the energization times.

I really doubt even a stock 6.7 injector will work with the stock ecu. The energization current profile is way different for the new injectors.

Call up Zach, he said he's done it.
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Who makes the aftermarket ecu your talking about?
 
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