Dudemaaanownsanrx7

iTrader: (23)

I posted in the aux injection section but the traffic is very low there. Hopefully someone in this section has seen what i'm looking for. I am doing a water injection kit using boost pressure to supply fluid pressure, and i'm looking for an air atomizing nozzle that has 2 connections, one for air and one for fluid. looking for something that will flow 300 cc or more at 20psi. I did find one nozzle, part # sue18 by a company called US company Spraying Systems. here is the data sheet on it http://www.spray.com/cat70/f/F16.html

and a picture of one very similar (#sue18A) can be found here http://autospeed.com/cms/A_107970/article.html under "boost pressure water injection".

The problem is the company profile for that particular nozzle is setup weird and has a lot of the same part numbers and no pictures, with the prices varying quite a bit, so i'm not exactly sure of what I would be ordering. Does anyone know of another place, or air atomizing nozzle that might work well for what i'm trying to accomplish? Thanks

Again I'm posting here cause not many people look at the threads in aux injection, but might have run across a good nozzle when looking at other things or whatever.

Ottoman

i'm not a expert.. but correct me if i'm wrong..

why would u mix air and water in a nozzle?

air is everywhere

when u force the water out of the nozzle with tiny holes (ala fuel injector).. it is atomized that way and mixes with the compressed air that is passing through the area already..

are u planning on compressing air and then pushing it through the nozzles?

like a NOS fogger system.. only with AIR/FUEL rather than NOS/FUEL setup?

LAXitives288

iTrader: (1)

If there is only going to be 20 psi pushing the water out, I hope youre not running any boost because there will be no pressure difference between the intake tract and the nozzle.


Even if there is a 20psi difference between the tract and nozzle I'd bet that your atomization is not going to be very good.

NewbernD

iTrader: (1)

Not if it's pre-turbo. Rice-racing's older water injection system worked like this. You can see pics of his nozzels on the AUS forum somewhere I think. These nozzels remind me of a paint sprayer. Might look at buying a cheap HVLP jam gun to experiment with.


Additional jets of pressurized air can be used to further atomize the water. It's needed because 10-20 PSI of pressure doesn't do a great job by itself.



Good luck with your project.

Dudemaaanownsanrx7

iTrader: (23)

Well it looks like NewbernD covered everyones questions and concerns, and he is correct. My system is preturbo and because of the low pressures the additional air molecules are required to atomize the water to prevent turbo blade erosion.

I actually have some gravity fed automotive paint sprayers that I thought about taking apart and trying. My only concern was not knowing how much they flow at a given pressure. I did finally figure out the correct part number and the nozzle is about $60. I think I might go ahead and get it. The whole kit should run me under a $100. Which isn't bad.

Anyone know where i can source a solenoid to cut water flow? For now I'm thinking of using a spare nitrous solenoid, but I think its overkill for what i need it to do.

NewbernD

iTrader: (1)

Please keep us (or at least me if you don't mind) up to date on the project. This has been in the back of my mind for a few years now, and I think I even came across the same nozzel supplier as you did, but with no pics I had no idea what I was buying.

Lots of mini-sprinkler systems use 12v plastic solenoids meant for water.. might start there. After all it doesn't need to be a $100 part to hold back 20 psi..

Dudemaaanownsanrx7

iTrader: (23)

Alright i'll keep everyone updated with my progress, once the weather in tx acts right I'll move forward with actually getting it all in the car. I agree with it not needing expensive parts for such a low psi. I also don't want it to fail as I plan on tuning up with the water injection to make more power and run higher boost. So I do need it to be as reliable as possible. I've actually been trying to come up with an idea to keep everything completely mechanical.

Does anyone know of any boost operated valves that would prevent water flow until a certain pressure? Obviously a wastegate or BOV is the same concept just with air/exhaust and not water. My only concern is that a valve like this would open progressively and i would like a more on and off. I suppose one little pressure switch and an on off solenoid with a light or LED tied into the system would be a pretty reliable and simple electrical system compared to the already numerous electrical devices the car relies on to run properly.

LAXitives288

iTrader: (1)

Can't believe I didn't realize that /facepalm

Dudemaaanownsanrx7

iTrader: (23)

Ok i'll be updating my progress in the thread below since it's the correct location for it, and I already have a more suitable title.
https://www.rx7club.com/auxiliary-injection-173/going-make-my-own-wi-kit-807016/

As a side note I looked at the sprinkler systems solenoid valves and they all said 24 volt, though I suppose its possible 12volt would also work with them. One thing i didnt like is they have very cheap replacement solenoids which made me worry that they fail on a semi regular basis.

Anyone know where i can find something like this?