Hi all,

I'm about to put a single fogger nozzle on the dually. I have too much fuel and not enough turbo, and a dyno shootout is about to happen here. I'm gonna spray it to clear some of the terrible smoke up and lower egt's. I'm starting with a #30 nitrous pill, and I'm adding no fuel. My question is, where should I put the fogger nozzle? I'm kinda leaning toward putting it after the intercooler, to give the intercooler a chance to cool the charge before I further cool it with the nitrous. Is there enough distance between the outlet of the intercooler and the cylinders to allow good, homogenous mixing of the nitrous with the air? Or, do I need to plumb it in before the intercooler to allow more time for it to mix? My feeling is that just after the intercooler will be enough distance/time, and it'll benefit from getting all the cooling the intercooler can deliver before the nitrous spray does the final cooling. Any of you guys have advice here?

 

I would think so, as I've seen some nozzles right in the air horn (24V). You could do both, one before and after

 

Nah, one will do! Looks like it will go in the pipe between the intercooler and the air horn on the intake manifold.

 

That's where I'd plumb it: in the steel pipe just after the after cooler.

 

Really, the best spot for a fogger nozzle would be as close to the combustion chamber as possible. Since NO2 atomizes instantly out of the nozzle on it's own under very high pressure and already contains oxygen, mixing with the incoming air charge is kind of a moot point. Also, NO2 is very cold and you want to make sure it will stay as cold as reasonably possible.....mounting the nozzle farther and farther up stream in the intake plumbing will only make it warmer....even though it will mix with the intake charge and cool the intake charge, it will have been atomized for far too long and warmed up significantly to the point that will have lost a large percentage of it's density and will not be able to offer the max power gain that it could have .....running it through the charge air cooler will only warm it up even more.

All you have to do is look at where the NO2 nozzles are on a race car or street fogger set up....they at the bottom of the intake runners and as close to the intake ports in the cylinder head as possible.

Mount the nozzle in the air horn.

 

Does nitrous actually add power to our trucks?, or is it just for cooling purposes in high HP/temp applications....ie; pulling or drag racing or towing real heavy.

 

Oh yeah! It adds power!

 

I dont know if it is a good idea,but I've heard of gas engines injecting the nitrous directly into the turbocharger in order to cool the charge.This was in an import car application if I remember,a volkswagen VR6 I think running 30psi

 

They spray nitrous onto the intercooler for better cooling. I beleive the srt4 does this with water.

 

What he said!