Mad Hauser

I'm looking for some help determining the proper injector spray pattern for my 3vze. These injectors are single hole, lucas disc type I believe and from what I've read should have a narrow spray pattern. I've been using a rig made out of a garden sprayer and some fuel hose to clean my injectors and another set from the junk yard to come up with a good set of 6 that flow well and have a proper spray pattern. The only problem is I've been experiencing several different spray patterns and I'm not sure which one is right. There's some that atomize directly out of the hole and have a misting fan pattern, which seems like it would be best for combustion but they also seem weaker than the rest. Heres a video of one of those ones;


I also experienced some that had a much narrower spray pattern but still atomized and fanned out as the stream went down. This seemed to be the most likely proper pattern. Video;
The thing is; the more I cleaned them the more narrow the pattern became until most of them just sprayed a straight stream, like a squirt gun;


There's very little atomization and it makes me doubt that this is the correct pattern, even though the clean ones seem to all spray like this. I haven't been able to find much info regarding this. I did however find this helpful thread www.yotatech.com/f110/got-set-3vze-flamethrower-injectors-sale-273282/
which is actually someones classifieds thread but has some useful info. A guy in it talks about how the 3vze injectors do fire in a stream which gets my hopes up, but mine seem a little too focused. I'm no expert on the subject though, this is my first experience messing around with fuel injectors. So I was wondering if anyone has any insight on this and which pattern is right. Sorry the videos suck, hopefully you can still make out the patterns.

RJR

Do you have any idea of the pressure your test system generates? The injectors run at around 35 psi in the vehicle, I think, which might be hard to generate with a garden sprayer. Pressure will greatly affect the spray pattern and flow rate - just look at your kitchen faucet as you move the valve from closed to wide open.

Mad Hauser

The fuel pressure for 3vze is 45 psi. I tested the sprayer with a tire pressure gauge before hand, just spraying air but should give a decent indication. It reads 31 psi at full pump, not quite as much but I figured the spray pattern should be pretty accurate. I'm pumping the thing pretty hard lol.

RJR

Ok, sounds like you're on top of that issue. Just wanted to bring it up as a possible source of uncertainty.

Mad Hauser

Thanks though. If I was going to do it again I'd definitely build the sst that comes off of the fuel line of the truck instead.

Punchy

Stock pattern is basically just a stream, Some after market do a better job of fanning.

Mad Hauser

Awesome! Thanks dude.