Interesting..

[Chuck Leeper]

May/may not be valid info.....
http://howertonengineering.com/tech-info/calculating-jetting/

 

[longball]

you're right, interesting.....perhaps Razor will chime in..............

 

[Chuck Leeper]

you're right, interesting.....perhaps Razor will chime in..............

In my "never ending quest" to re-invent the wheel, I was surfing the net for some ideas for a direct port alky nozzle.
I was wondering if one could take the newer design Aquamist nozzles, put 1 in each port, and tune from there.
The AM nozzles have a filter and a check valve in each nozzle, preventing siphoning, and helping to prevent clogging. The check is set to prevent lag when the alky is triggered. [Or, so I understand, anyway.]
My LS project may just be a candidate for this foolishness!
Julio, your system hooked to the AM nozzle set????

 

[Razor]

There is a lot of wrong in that article.
1) It says "1) First, you will need three pieces of information. Fuel injector size, number of cylinders(hopefully this one comes easy) and peak boost pressure." right of the bat its a mess. Its like saying if I run 160 lb per hour injectors on my stock Buick engine the calculations for nozzle would be out of this world. Calculations are based on Injector duty cycle(flow) not size of injector.
2) The amount needed to be sprayed is dependent on what the goal of the individual is. Example using a Buick.. A person with a stock turbo wanting to run 18-20 psi boost at 18-20 degrees timing(single nozzle low dependance) vs a person with a fully built motor wanting to run 34 psi boost at 22-23 degree's timing(high dependence twin nozzle).
3) Then it gets into saying the Aquatec pump can produce 165 psi.. and base the flow of that number. Guess what.. on a single nozzle, using water, at 18 volts, it produces the 165 before it goes into "bypass". Problem is running methanol(which is thinner), lower voltages(12-13), and complicating the issue using a controller(meaning voltage will typically be 5-12 volts.. the pressure readings used are garbage.

The biggest lie in the industry is the pressure one. It might as well be a 20.00 chinese 6x9 speaker in the flea market saying it handles 1400 watts. I get so many calls its a 100 psi pump, its a 200 psi pump.. etc. The pressure is proportional to 1.. the pumps ability to get to a certain psi, 2.. the size of orfice being used, and 3.. the amount of voltage applied. Simple stuff.. but a pump that makes at full tilt 165 with a 5 jet can barely make 100 on a 15 jet. Or 70 on a twin jet. See as the orfice goes up.. pressure comes down at a given voltage.

Anytime you put a nozzle inside the intake.. meaning in a vacuum source.. you have to run a solenoid. The solenoid acts like putting your thumb over the end of a drinking straw. When you lift, solenoid shuts off.. no liquid can come out. In that article it talks about the nozzles having a built in check valve.. it would have to be a 20 psi spring on that check valve so when you lift and go to 25 inches of vacuum your not pulling liquid out of it. And due to the small size of the nozzle.. you cannot accommodate a spring with that tension. The Hago nozzles have a spring inside of them, it goes on the diffuser. But the check valve stuff they use is only applicable to situations pre-throttle body.

Its hard to make blanket statement of one size fits all. This is because goals are different from one setup to another.

In easy terms.. what affects nozzle sizing..
1) Octane being used(higher the octane, less is needed)
2) Liquid being used(water uses smaller nozzle than methanol)
3) Goal(how far way from being able to run without it)
4) System's pressure capability(pump, lines, voltage applied)

Juggle those four..

 

[Razor]

In my "never ending quest" to re-invent the wheel, I was surfing the net for some ideas for a direct port alky nozzle.
I was wondering if one could take the newer design Aquamist nozzles, put 1 in each port, and tune from there.
The AM nozzles have a filter and a check valve in each nozzle, preventing siphoning, and helping to prevent clogging. The check is set to prevent lag when the alky is triggered. [Or, so I understand, anyway.]
My LS project may just be a candidate for this foolishness!
Julio, your system hooked to the AM nozzle set????

What keeps the nozzle from clogging is running a filter pre nozzle.
Yes I have made systems using their nozzles. I helped with a local one.. Cadillac CTSV with a lid spacer and 8 nozzles. You better have deep pockets.

If the LS project will run a conventional intake, run on pump gas, make over 1000 rwhp.. then consider it. If you run a single plane intake.. non-issue. Unless you have deep pockets and want the bling. I have someone that has an LS motor in the low 5's on pump gas.. 3400 lb car.. single plane turbo setup.

 

[Chuck Leeper]

"There is a lot of wrong in that article."

I didn't say it was correct, only "interesting".....

 

[Razor]

"There is a lot of wrong in that article."

I didn't say it was correct, only "interesting".....

Quite indeed... just need to be careful.. Its great to take an initiative to write something and make an article with the hopes it helps someone..

Thats why the old saying.. I saw it on the internet so it must be true..

 

[Chuck Leeper]

At my age, "careful" doesn't usually enter into the equation!!

 

[longball]

thanks, Razor. these things are always easier to understand when you explain it!