I searched and didn't find any threads about this one yet, so here's the story.

I have decided to use the 5th gen LIM in my 00VI setup. I've got the LIM, rail, and injectors with pigtails. Well, while looking at a vq40 fuel rail I had laying around, I noticed that the injectors looked awfully similar to the de-k injectors. I was interested in using the vq40 injectors because they are pretty darn new, and I would then have the de-k injectors for backups in the future. I decided to search the world wide web for info on the injectors. Here's what I've come up with so far:

Stock - 239cc, 12 ohm, 4 big holes on the bottom
VQ40 - 290cc, 13ohm, 12 little holes on the bottom(bosch p/n - 0280 158 007)
DEK - 300cc, 16 ohm, 4 big holes on the bottom

The VQ40 specs were from www.witchhunter.com. I'm not sure on the DEK injector specs, that was the best I could find. Also, the resistances are what I personally measured.

I'm wanting to use the VQ40 injectors since they're newer and are a bit closer to stock specs. I don't know how much any of this matters, that's why I'm asking for input. The only possible problem I see with the VQ40 injectors is the length; they stick about .5mm further into the LIM. This doesn't present any clearance problems, it would just put the injector closer to the stream of air entering the head.

The tips of the vq40 and dek injectors look a bit different too, I'll post pics tomorrow night. I'll also put the VQ40 injectors in the dek rail and see if it bolts up fine, but it appears that it will.

Whatever injectors I use, should I send them to deatschwerks for their basic cleaning service?

Thanks for the help!

 

I dont totally know the answer to your question but let me say this:

Yes, I think they would be just fine. And if you feel the need, you could possibly shim them to counter the 0.5mm length increase.

 

I found a thread saying that the vq30de injectors and vq30de-k injectors flowed the same (270cc @ 3bar), just that the vq30de-k injectors operated at 3.5bar and therefore flowed 40cc more. If that's true, wouldn't the de-k injectors flow 270 if I have the rail setup just like stock??

tell me if I'm understanding this wrong...

thread:http://forums.maxima.org/showthread....+gen+injectors

if this is all true, would the vq40 injectors(290cc @ 3bar) be a problem? would I need a tune immediately? would it run rich, or would the ecu compensate for the extra 20cc flow?

 

I am not sure about all of your question, but as far as I know:

No, a tune wouldnt be imperative, just needed when you can do it. . It would run rich.

I dont have any further knowledge about how they work, etc...just some basic understanding and logic. Im sure someone else will step in, however.

 

DE injectors = 259cc @ 3.0 bar
DE-K injectors = 290cc @ 3.0 bar

 

they would run rich part throttle and WOT, cruising would be fine cause the O2's would correct it. you would need to tune or you would run rich.

that thread you found is saying the 30de and 35de flow the same (270cc@3.0 bar as measured by someone), the de-k flow 290cc@3.0 bar.

 

since the de-k and vq40 injectors are the same rate at 3bar, I'm just gonna use the vq40 injectors. They're off of an 05 pathy, should I get them cleaned or is that a waste of time and money?

 

i would have them cleaned and checked. Better ti be safe than sorry.

 

for gods sake get them cleaned. i just put in a set without cleaning them and im about 85% certain they are a little clogged. (when bigger injectors run leaner, they must be clogged eh?)

 

Back from the dead... Just found this while looking for injector info.

One thing that I did not see addressed is that while the DE-K injectors flow more, the intake flows more air as well. This would mean that the injectors would NEED to flow more in order to keep up with the air flow that the motor is now seeing.

Of course wouldn't the ECU read the O2 sensor and simply adjust pulse to put the AFR where is should be?