For the airforce types: Some of the first engines to use water injection were piston engine war planes.........That's what i said in the first page.

Moremazda: I can't really give you a straight forward Physics type answer. But the water does turn to steam and during the combustion process ALL the O2 (in theory) gets burned, or to be more precise - ignited. This was brought to my attention by both my Meteorology and Physics proffesors. I think the intense heat causes the H2O to actualy break up. The hydrogen then gets expelled as an exhaust gas, but i'm not sure if it combines with anything?

 

H2O will not break apart in the combustion chamber - it simply does not get hot enough. H2O is an EXTREMELY strong bond that takes a LOT of energy to separate!

 

Here again if you really want to know about water injection check this site out, they are the experts. Do you have any idea how much water goes through your combution chamber on a humid day in FL. LOTS.

Ken

http://www.aquamist.co.uk/

 

Sounds like a simple concept to me .

~T.J.

 

"..production of oxides.." as mentioned in the website does NOT mean the water is contributing oxygen to the combustion process. Peejay is right...

 

Ok then i don't get it. When the exhaust is measured, and the gasses are broke down to PPM's. Then where does the H2O go? I have my Physics class in 30 mins and will try to get some answers.

 

It's called water vapor aka. steam and a sniffer won't measure it.

 

Ok well i asked this Major at work ( he's a chemical Eng w/ a P.E.) and he said it takes alot of energy to turn H2O to 2H + O. PeeJay: you are correct sir.
Mar3: the sniffer i was talking about aren't the ones found at your local DMV. These things measure every gas under the sun. they're used for HazMat disasters, and such. SO I'm still curious to this. The website is useful but doesn't answer All of my needs. More to come.

 

Use water injection, youre apex seals will love you for it

I have been using the system for over 3 years now and can vouch for it's effectivness in reducing thermal stress on a turbo engine, along with the benifit in reliability you will also gain a bit of power and feul efficiency if you modify youre engine mapping to take advantage of the water mixture.

As a rule for people wanting to experiment with this system, I use a rate of 300ml per minute for a "actual" fuel flow (not rated injector flow) of about 2600cc/min. This I have found to be the ideal rate for best all round performance.

 

Again, Mr.RR is turbo'd, so there is a distinct advantage. The thread asks about N/A rotaries getting water injection and the consensus is ----> No....

 

I like that.. "water is less dense than air".. heh.. if that were true than the oceans would be made up of air, and we'd be swimming around in water..

 

Ya gotta love the viciousness of the first part of this thread...

 

OK I know I am out classed by many on this list But I still want to state some of the things I am seeing.
#1 people who aren't understanding that water injection wouldn't be a stream of water into a carb. as I understand it (not very well) we are talking about a highly atomized small quantity mist of water vapor.
#2 lots of rational reasons why this would or wouldn't work (good arguments on both sides) but in this specific case some are correct and some are not.
#3 errors in how we are attacking people rather than the facts of what they are saying.

I don't know if this works to create more power in a NA 12a or not But because I own one and having one I would like to hear from people willing to try it, and even better people who have hard data (before & after dyno charts)to back up claims. dissagree if you must but prove your arguments with facts that we can investgate not insults that get us nothing.

 

Redlance, thank you!

I was talking to a friend, and I wanted to clarify a few things. A: The idea was water injection, but not a completly pure water injection. The thought was to do a 50% water to 50% alcohol injection into the intake. I was wondering if any would know a rough estimate of what kind of power increase this would be. Perhaps 10 or so? Would this in turn help increase MPG buy a few MPG? Have any done this, if so what would it cost? That being clarified, let further discussion continue!

 

edit: Read something incorrectly, and there is now no reason for me to reply. I are a