Contour Enthusiasts Group Archives Forums Modifications Forced Induction Direct port Nitrous

i was just thinking of using NOS nylon tubing, a distribution block, and thier typical fogger nozzles. The nylon is far more flexible than stainless or steel. I have seen a setup on a 4.6 mustang with the NOSzle system and the nylon almost makes a 90 degree bend right out of the nozzle. seems like it would make for a much more workable setup. not nearly as cheap true. but much less difficult to engineer Either way, i have two SE manifolds for practice and two SVT manifolds to play with. i still need to know how big the nozzles are though. anybody?

If you look at the size of the jets for the single nozzle system so you can get a good idea.
The fuel an air have to be in proportion to. Take the area of the jet and divide it by the number of cylinders. Then divide by PI, take the square root, then multiply by 2 to get back to a diameter of your 'theoretical' circle. This would be the size of the hole you need to drill the jet going into each cylinder.

warmonger 2 things....

you won't get proper atomization of the fuel becuase that happens in the nozzle, if you are running a common tube of n2o/fuel before the nozzles you'll never atomize... wet systems have nozzles with 2 ports, one for fuel, the other for n2o, this way the fuel gets atomized...

next the real problem, and that is physically getting a wet shot nozzle between the 2 halves of the manifold.... you don't have enough room.... now i havne't played with trying to mount them on an angle, but then you have far more problems to worry about as they are made to be mounted perpendicular to the mounting surface and into the air stream...

NOS may have a solution, however it would require a custom fuel rail... they are called NOSzles... bascially it's like the bottom of an injector with a straight through hole and 2 small inlets using NOSs flexible line (1 for fuel, other for n2o) it sits where you injector does, and your injector sits inside of it.... the deal is we have both sets of injectors running on 1 common rail, and doing this setup will comprimise the angle the injectors are set in the rail, thus needing a custom rail, or possibly 2 smaller custom rails... whatever the case you'll need to get that part made.... this setup may also alter/comprimize the injector spray pattern, but i don't have any info to warrant that argument either way....

only other solution is to make your own LIM with the nozzles built in....

Dude, this wasn't meant to spell every single point out in that one post! This was meant to give the people looking for direct port nitrous a simple method to begin a custom project.
First, the fuel will atomize though how well depends on the shape of your nozzle. You can add some design changes to the tip to change the way it will atomize. A simple roughening of the tubing tip will cause some level of atomization. I think if you are going to bring up fuel atomization then you should be more specific about the various ways to accomplish it instead of just stating that these tubes won't atomize at all!

Second, the tubing system WILL FIT. I wouldn't post something like that without having had some practice with it, and if I did I would point out that I was merely speculating.
I have played with parts for direct port and I assure you that it will fit with some work. NOT the solenoids mind you but various forms of tubing in the system I described.

NOSzles have been discussed multiple times. They require the injector to sit higher as you pointed out.
HOWEVER, you can think out of the box on this one too....just countersink the injector boss and deepen the bore so that with the nozzle installed the fuel rail sits a bit closer to its design height. Then add some washers under the fuel rail where it bolts down so you can make it secure.
Disclaimer: this isn't the whole solution to the problem, it is only meant to provide motivation, ideas, incentive, whatever you want to call it. I choose to call it stimulation of creativity. I find it more fun to build my own equipment because no one ever makes it just the way I like it.

on the lower, each bank is divided into three columns, each column contains the primary and secondary runners. looking down on the manifold, imagine that the injectors are still installed. now for my thoughts.

if you place the nozzles at say a 30 degree (or slightly more obtuse)angle, you would have plenty of room for mounting them perpendicular to airflow. the ends of the nozzles would sit right under the injectors. you could then run the feed lines out to the right in the direction of the throttle body. it seems like there could be room, especially if you use the nylon pressure lines like i stated before. you could then stagger the height that the nozzles are mounted. Say that the rear bank nozzles are mounted slightly higher on the lower than the front bank. this would eliminate any interference with the feed lines from a nozzle on the front bank and its opposing nozzle on the rear bank. unfortunately, that might cause some interference with the secodary butterflies but i'm not certain on that point. (for that matter, i am not certain about any of this. just brain storming, sharing my thoughts.) from there, your distribution block could be mounted to the bracket for the secondary return spring or somewheres equally convenient. the solenoids could then be mounted close by ( you may need to fab up a custom bracket for those though.) my idea was to mount them to the factory bracket for the intake that is just sitting there currently being a waste of plastic

warmonger, i thought about using the NOSzle system once but didn't want to fool with the altered injector height. however, it never even crossed my mind to machine the boss any further might have to look into this set up a little harder

sending atomized fuel through a tiny fuel line (we are prolly talking 1/8" or smaller here) will definetely cause it to stick to the walls while the n2o continues it's journey.... this is why some people say it's dangerous to run wet shot in the 2.5L intake, because of the small bendy runners... this would just aggrevate the problem even more... i would be very scared to even push the button while doing this....

now what i have tried is fitting a wet shot nozzle between the LIM halves, and doing so perpendicular to the port.... the nozzle would fit, but once you put the lines on it you are screwed... a dry nozzle may fit as they aren't as big, but then you still need to figure out fuel....

i like the idea of making the injector boss bigger for the noszle system but then you would be putting the noszle directly in the air stream which may cause other issues.... but it is a good idea that should warrant more investigation....

Yeah, just don't pop the hood,, heck even say your hood latch broke.

Isn't fuel atomization controlled by the nozzle and not the jet?... all the jet does is control the amount of fuel flowing, it's the actual nozzle that atomizes it...

It depends on the shape of the jet. In the case of my idea the jet and the nozzle are one and the same. Diameter of the hole and pressure control the amount going in. Rough surfaces and changes of angle will create the turbulence necessary to atomize the fuel.

It shouldn't be too hard to take cheap copper tubing and close up the end or mount different nozzles to it and just test it with high pressure. I would prefer to make my own nozzles that are narrow and have both lines hook into them so that you can create the fogger effect.