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Water Injection
https://slantsix.org/forum/viewtopic.php?t=18225		 Page 1 of 1
Author:  Slant n' Rant [ Sun Jun 25, 2006 12:27 pm ]
Post subject:  Water Injection
I read some articles on water injection and was interested in some of its features. I wouldnt ideally expect much fuel savings but rather interested in its abilities to cool combustion in a stock slant. Im intrigued by the idea in so much of tinkering with it eventually(like i dont have enough to do already). As I understand it, a turbo with higher compression benifits the most from this system but also makes the system function properly. I dont know if their isnt a way to do this properly on a stock slant, given you have less air volume pressure as you would on a turbo. I dunno, just throwing a bone out there.
Author:  skraecken [ Sun Jun 25, 2006 12:41 pm ]
Post subject: 
I have tried it about a week now, does not seem to be any improvement on mpg.
Author:  Slant n' Rant [ Sun Jun 25, 2006 1:27 pm ]
Post subject: 
Apparently, as I read, it cant be expected to improve mpg by very much if at all on a non turbo, then again there might be room for improvement by metering the flow or atomizing it better. Did you go for an aftermarket kit or is this stratch built? My interest is to increase low end torque, even if there was a clever way else to cool the intake air.
Author:  dakight [ Sun Jun 25, 2006 1:45 pm ]
Post subject: 
H2O injection alone will do nothing for horsepower unless you're in severe detonation without it. What it will do is allow you to advance the timing and even increase the compression or add boost without getting into detonation.
Author:  Slant n' Rant [ Sun Jun 25, 2006 3:58 pm ]
Post subject: 
OK like i read in the articles (and does make sense really) water injection in a normal aspirated engine will a) give no reputable increase in mpg b)no discernable increase in horsepower c) will allow for higher compression.pistons d) enhances combustion to replicate fuel of higher octane I dont argue any of that it makes perfect sense, however if a system managed to cool intake to a somewhat constant lower temp I would imagine it would see improvement in combustion and torque at least. As one article states, and I agree, particular under high temperature operation, water injection affords better performance which you would see usually under cooler conditions.
Author:  Joshie225 [ Sun Jun 25, 2006 5:46 pm ]
Post subject: 
If you can run an optimum ignition curve with the fuel you are running water injection will do nothing for power or economy. On a normally aspirated engine water injection is a substitute for higher octane fuel. That's it.
Author:  Matt Cramer [ Sun Jun 25, 2006 5:53 pm ]
Post subject: 
Water injection is an antidetonant, pure and simple. On a naturally aspirated engine, I suppose it could help cool the intake charge if you cooled the water way below ambient air temperatures, but I don't see a very large temperature drop if you're using a reservoir sitting under the hood. A reservoir of ice water... maybe.
Author:  Sam Powell [ Sun Jun 25, 2006 6:21 pm ]
Post subject: 
Water injection has been shown to keep the valves and spark plugs clear of carbon, which can be a problem for those who drive their cars very gently. But if you planned things right, you could run high compression, and advanced timing, and get better mileage with it. I talked to a guy once who designed a Corvair engine with water injection in mind and got better than average economy and power out of it.
Author:  Slant n' Rant [ Mon Jun 26, 2006 3:03 am ]
Post subject: 
I found an article on 'steam injection', using manifold heat to vaporize water in copper tubing and the engine vacuum to draw the steam through a tee in the PCV hose. With that you should be able to lean your mixture a tad. This system appears to be the simplest, cheapest route for a normally aspirated engine set up. I might just give it a try.
Author:  skraecken [ Mon Jun 26, 2006 1:25 pm ]
Post subject: 
I tried this one: http://www.journeytoforever.org/biofuel ... h/me3.html
Author:  Slant n' Rant [ Tue Jun 27, 2006 3:31 am ]
Post subject: 
http://www.better-mileage.com/water4.html I know,I know, I can hear the groans already :D
Yesterday was mild to cool with a light mist in the air,and before i realized it I thought "damn, this van Is a real dynamo today" until I figured its because the intake is drawning this moist air into the engine. You'll notice this on foggy damp days that your car seems to perform better.Thats when I realized a steam injection system would best atomize the water for a stock engine.Anything else would introduce too much water into the intake, the water atomizes better as steam without the need of a nozzle. Oh stop yer' growning already :roll:
Author:  Joshie225 [ Tue Jun 27, 2006 8:28 am ]
Post subject: 
Ask any drag racer when his car runs the fastest times. It's always a cool (air density) dry (again density because water vapor adds to air pressure) day.

Now I'll quote myself...
Quote:
If you can run an optimum ignition curve with the fuel you are running water injection will do nothing for power or economy. On a normally aspirated engine water injection is a substitute for higher octane fuel. That's it.
Author:  Slant n' Rant [ Tue Jun 27, 2006 3:32 pm ]
Post subject: 
Quote:
On a normally aspirated engine water injection is a substitute for higher octane fuel. That's it.

You said it. That's good enough for me and my engine for $12. Remember, I never said anything about economy and wasn't looking for it in the first place.
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