JasonCzerak
New member
I literally meant all of the above. Not try each, but do all of the above..at once.
I'm not going to "un-do" what I have setup so far. I figured what I've installed now is the hard part. i'll add more later.
I literally meant all of the above. Not try each, but do all of the above..at once.
I have always been under the impression, that it was the change of state that actually did the work, and the water traveling in suspension, does negligible cooling weather injected prior to the turbo, prior to the intercooler, prior to the intake or right at the back of the valve.
From the little research I have done on this, if you inject it anywhere but into each individual intake runner, it gets thrown right against the bottom of the intake manifold and pools, and the middle runners (in a cummins app) get a ton more water then the outside runners. In a typical side entry manifold the water that is in suspension gets thrown against the far back wall of the manifold and goes down the last runner, or the heavy water droplets that are failing out of suspension drop in the first runner. Leaving the middle runners rather dry.
To me in a cummins app where the stock manifold is already notoriously bad for providing equal amounts of flow, the last thing I want to do is compound it by throwing water down in that same fashion.
Now I could be wrong on all of this, but this is what I have gleaned from people much smarter then I that have done extensive testing on this...
I thought if you sprayed it pre-turbo, you run the chance of wearing down the turbine wheel. kinda like sand,
pre-CAC/IC water injection via an axial-spray nozzle(s) centered over the inducer(s)
Saturated air will shed heat more efficiently across the heat exchanger(s),
higher viscosity reduces compressor pumping losses, and unsuspended water molecules are centrifugally forced against the compressor housing to increase gap sealing.
Hmm from the clear manifold testing I watched, it all seemed to be more like water vapor then steam. With that being said I don't recall the outlet temps ever going over about 320F and the highest boost pressure was only in the mid 30's (34psi iirc).
My point was that from the testing I saw, it didn't mater if the water was injected before the intercooler or just before the valve, the amount of cooling was the same. There was no evidence to any cooling from it having time to travel in the intercooler piping system, it was all from the state change that happened in the combustion chamber.
I see what you're saying about if the compressor discharge temp is high enough the state change would happen in the intercooler piping, but in the testing I saw this was never the case. However these were moderate boost levels, with a compressor still well within its map, and on a gasoline powered engine. Lots of other variables.
plenum or intake horn injection is fine for smaller quantities, especially if efficient nozzles are used.
Mike, did you have any specific nozzles in mind as being "efficient"? Are the nozzles included with the Cooling Mist kit efficient at atomizing at ~200 psi? Are the Devil's Own micro-droplet nozzles better?
I have yet to find any micron rating on droplet size at xxx pressure...
--Eric