Been looking through all the different types of spray nozzles on mcmaster, and saw the SMC type nozzle, which is standard, but I dont know if its a standard cone or standard hollow cone. By the looks of all these specs, it looks like there could be some added benefit to trying different nozzles. So which one does SMC use?
Here is the page. You can see more styles if you go to the top where the page number is and hit the left arrow or right arrow to browse through the pages. Nozzles
The one with the 70psi check valve built in is pretty cool, and the spiral type and the one with the little loop that the spray strikes into to break it up into fine particles.
Droplet size tends to be smaller with a solid cone for a given flow rate (and manufacturer design) which helps atomization in the intake. So a solid cone should help with more even distribution to the cylinders. In simple testing I did years ago, finer mists (smaller droplet size) were produced more readily by smaller nozzle sizes and/or higher pressures. I did not take any measurements but it is obvious to the naked eye. I don't use these particular nozzles and I don't know if there are multiple spray angles available for these. The type I use are designed for oil burner appplications. Solid, semi-solid, and cone patterns are available as well as 30,45,and 60 degree spray angles. I use 45 degree ,solid spray pattern nozzles. Solid for smaller droplet size, and 45 degree because i feel that that pattern best fits the area and direction that I am spraying. I feel that too wide a spray pattern (due to my nozzles pointing at the throttle body) might result in more liquid hitting the sides of the uppipe which tends to adhere to the walls of the pipe more than I'd like. That boundary layer next to the wall surfaces may have a minor effect on that part of the liquid that hits the sides of the metal surfaces. That liquid just is not going to be able to atomize and flow as evenly to all the intake valves like the smaller droplets nearer to the center. I don't think we would design an engine to aim the fuel injectors somewhere other than toward the intake valve.The bottom line is at the pressures that most pumps run at and the pressure and velocity of the intake air I doubt that it really makes too much difference. Notice that most all alky kits install their nozzles at a right angle to the uppipe walls and aim toward the opposing side of the pipe. They certainly work-don't they?It just might help some with distribution and tunability. These are just my opinions based on my own observations and limmited knowledge of flow dynamics. I think the pressure and spray pattern (which affect the size of the atomized liquid) are much more important however. Just my opinion.
Just my opinion.
