10-24-2013, 12:05 PM
Join Date: Sep 2006
Location: Charlotte, NC
Total Cats: -4
I would guess the following, or maybe some combination of them:
A. Finer atomization of the fuel droplets
B. Screen changes the spray pattern giving some desired spray cone shape / distribution at a very specific distance from the tip of the injector.
C. Screen improves emissions through some black wizardry (See A + B)
In the OEM world, emissions is generally KING.
The people that have tested these and report good results, what kind of good results are they getting? The good result is that they are able to create a higher flowing injector for free, and are still able to control their AFRs? If that is their only goal, then maybe they are getting good results.
In my experience the stock Honda injectors aren't very good, at anything really (other than being cheap). Similar mods can be made to Bosch EV14 injectors (how do you think the ID1000s are made?) with even better results. What I mean is you could get a set of Bosch EV14 off of a pentastar v6 for basically free at your local junkyard, remove the plate on them and voila, 500+cc injectors that are EV14s and way better then stock Honda/Nissan injectors.
Or think of it like this, by "modding" the injector you are likely sacrificing some level of atomization/spray/pattern/etc. in return for higher flow. If you start with a chitty injector and then mod it let's say you get a slightly worse, chitty injector that flows a higher cfm. Start with a much, much better injector (Bosch EV14) and then mod it, you will have a slightly worse, much, much better injector that flows a higher cfm.
IE modded EV14 >> modded EV1/EV6
People should start scouring junkyards for Pentastar V6 injectors and see how cheaply they can get them. Unfortunately they are the "short" version of the Bosch EV14 but it shouldn't bee too much work to adapt them to your average Honda/Nissan/Mazda fuel rail and IM...