Simple Water Injection

Simple Water Injection

Paul
aka Trebuchet03
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4 ratings

A cheap and surprisingly effective method of injecting water (or other fluids) into your otto engine.

Without going into the why do it (its been debated too many times - search google) - the purpose is economy...

Using about $5 worth of parts: 2-quart screw cap reservoir, aquarium hose/misc. fittings, gate valve and epoxy I made a cheap and surprisingly effective water injection 'system' for my '97 Mazda 626. The injection was not a spray, but a slow trickle of water droplets being sucked through an unused vacuum port.

A friend measured a reduction in fuel trim (short and long term) with his OBDII interface and an even bigger reduction when he used washer fluid (containing methanol).

Some tuning was needed to prevent water from pooling in the intake manifold (causing hesitation when the throttle was opened). I've dumped water down the intake and have yet to hydro-lock the engine (but I did get a small puddle of water out the exhaust).

By bavetta	2006-03-16 14:47:02
Cool, I'm not very familiar with the technology, but what kind of benefits did you experience after installing it? It looks like there are several schools of thought on this, most of them involving turbo engines and cooling the air fuel intake mixture. What is your theory?

By arlo

2006-06-26 23:18:08

It is interesting to here that people are saying water can add "more kick" by it self. I was to understand that it can add more power capabilities to your engine eg. you can increese your boost or ignition timing ect. if you mix it 50/50 with methanol you can une the benifates of methanol's 100 pump octane, (50/50 being a # i have been told is optimal from a dude who reserched it on a dyno.) as for better econamy it can do that as well if your car is controled by a compter it will alow more advance which in turn can add econamy. And as for the hydrolock it needs to fill the cylinders right full of water or close to it, before they will "hydrolock". Some guys are spraying winsheild washer fluid into the intake (the kind that is flamible it has alkyin it!) I use methalhydrate/water 50/50 in my srt4. to prevent detination when i use my boost controler and i think it helps me keep my mileage up because it lets the computer keep the timing advanced on a fairly pepy curve. Ps i have seen guys run a set up that sprays a very tiny amount of gas into the pcv hose and they lengthened the hose to 4-5 feet and spray it in the start closest to the engine and have seen multiple claims of 25% increases in econamy! Oh and one other thing water droplets can and will "wash your cylinders" taking the oil right off of them and wering out you engine in no time! be carefull try to make sure it is a mist and not to much saving a few $ a week on fuel is no match to a new engine!

By trebuchet03	2006-06-28 22:21:24
I wouldn't be too worried about water 'washing' off any lube... gasoline does the same thing, and water is a natural by product of combustion (among other things).

By trebuchet03

2006-03-17 00:40:53

I'm willing to sacrifice some performance for a little economy. Forced Induction guys are looking for a cheap way to cool down their intake charge by using the high latent heat of water. I am assuming that really does not help me much at all.

Another thought is that the water converts to steam aiding in the combustion process and providing a little more kick. I don't know much about that (energy in much equall less than energy out).

I am thinking that the water is displacing some of the available air. Less air (oxygen) means less fuel is required to maintain a proper air/fuel ratio. For the forced induction guys, this is not a really big performance problem because they are under boost. This is just a theory, but it could always be a combination of all of the above.

Whatever the case, its been known since WW2 that it is a great way to clean out carbon deposits. So the added benefits clean internals is great.

By manali	2007-03-02 00:03:34
i'm using the same way as you did,water controlled by valve suck to vaccum to caburator,i'm found that the extra pickup.

By nui015590122	2008-09-16 08:04:08
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By JORDI	2008-10-25 03:16:32
Has anyone tried the with the hydrogen generators. I have a friend in Europe thats using one and says he\'s getting something like 106% more milegage.

By jcook

2009-02-20 20:28:13

I\'m a little skeptical about the hydrogen generators. I did the calculations on one I saw in the paper and the increase in work was a bit less than the electrical power put into it. I did this a couple years ago, so I may be remembering something incorrectly, but I think the increase you notice will be somewhat less than the energy in. That being said, if it costs you less for electrical energy than it would in gas, then if might be a good idea. No free lunch though.

BTW, water injection would seem pretty useless on the surface, but I believe it was used to increase the power output on some WWII planes. Must be something to it.