Here is what I am thinking for the nozzle placement, Robert fielded this question a few month's ago on another board. I have heard different things about wanting the nozzle far away so the Nitrous mixes better (most Stock airboxes, the pictures I have seen the nozzle is on the extreme side of the Air cleaner that may have been a single nozzle application though) then hearing others say "no flow it as close to the MAF as you can" and still others say "anywhere don't matter it will get sucked in..."

Anyways this is what I am thinking, agreeing with Robert's logic with better mixing with the collision of the streams in front of the MAF.

The sheet metal just helps me visualize it better.
You can see I am limited on the drivers side to close in the middle or the extreme far end. Drivers side is wide open for placement the entire length. With Low pressure air (80 PSI) the air seems to mix about 1-2" in front of the nozzles still within the black plastic housing...I imagine that will move toward the MAF at WOT.





So for those that have similiar setups should I
1. Drill it as it is
2. Move them closer to the center
3. Put them at the far ends of the CAI


Cheers
Beer

 

That's to close to the maf for 90* nozzles. This will cause you to run rich, as the maf will be only ready the super cold nitrous and you'll be going much higher on the MAF freq to soon, and this equals adding fuel, but not a good measure of real world flow. If you wack the 90* off the end and make straight shooters this location will work (closer to neck), as the apex of the two streams will meet in the middle of airbox and create a sort of null area, then mix well with incoming air and give a more reliable reading to the maf. If you want to use the 90* move them outboard as far as possible for a better mix with incoming air. There is reason that Dry kits generally come with straight nozzles and mount on each side of airbox, for mixing and a good maf reading.

Vararam, look where the straight nozzles meet in the middle of air box (apex), 90*'s wouldn't work in this location because of being to close to maf (2-3 inches). 90*'s can be placed as low on airbox as possible (farther from maf).

Stock air box and straight nozzles on each side spraying at each other into middle of box.

Black wing using straight nozzles mount them as close to neck as possible for the mix in center of box, or all the way outboard for 90* nozzles.

This pic the straight nozzles are slightly to low, and can freeze and blow a hole in filter, and apex is not attainable. 90*'s down even lower would work.

Hope this helps some sorting this out. If it were mine, I would cut the nozzles off and make straight shooters and keep it close to neck. Or, mount at least one 90* outboard as far as possible, and the other as far as you can. If it's to rich, you can counter by rotating nozzles.
Robert

 

Thanks for clearing that up, good thing I worked on the 73 Charger today, instead of just going with my plan LOL. I am gonna wait til I come home next hitch to plumb the nozzles now...

Cheers
Beer

 

Beer, You can cut the end of the nozzle off like Robert said.However since the nozzles are not blowing directly at the maff I think running the nozzles just like they are will be fine.I have had customers do this with no problems.
Dave

 

Its kind of tough to predict how a certain nozzle placement and angle will interact with the MAF. The problems I have usually had was when they were pointed straight at the maf and very close. I think as long as you have the flow at right angles to airflow it is likely to work.

I have had some pretty dang close due to mounting restrictions. But they were alwasy at a minimum of 90 degrees to flow. I hate going against the grain of airflow because I do think it may have negative effects on power. Although everytime I have done this the difference has been negligable...go figure. So if you have to...its better than not spraying at all.

I dont think youll have a problem. I would mount them where they are accessible. Maybe outbd just a bit. Then as Robert said if you are excessively lean or rich...turn the nozzles and there may be some amount of control doing that. Just be sure when its all said and done...the nozzles are tight so they dont turn.

 

Thanks guys. I just may go with what I got, buy some straight nozzles, and dyno it both ways .

My wife has off today so I am all stop on my installation, should she see the bottle, my story is its for paintball...

Cheers
Beer

 

 

No need for modifying the nozzles, they are not 90 degree nozzles. They are Fan Nozzles which will spray streight more than at an angle. The Nitrous will spray toawrd the center of the air cleaner and get sucked back into the engine in a more smooth flow. You should be good to go.

Dan

 

Thanks Dean,

When I get the bottle gauge from ya I will fill the bottle and take a photo of the pattern on my sheet metal test plate (Mid Feb).

Cheers
Beer