Thread: Using water injection with N/a engine.

I completely agree, on a mostly stock NA motor there isn't a point. You won't see me putting a water injection system that doesn't really need it.

But in some NA cicles its not uncommon to spend over $1000 for 5whp increase.

I guess what I am getting at is this:

There is some power to be had with water injection, but there isn't really a point unless you are applying it to a fully worked motor, as there are much better ways to spend the $300 it will cost you for a kit.

more timing does not always mean more power . with the set up pulling timing ended up making much more power...

Now, did you have knock sensor hooked up? What kind of EMS where you using?

I am going with Andreas on this one. I don't think you will lose a ton of power, but I can't justify using the injection unless you are running nitrous or really high compression that would necessitate a suppliment.

When water evaporates it pulls an extraordinary amount of heat from it's surroundings, so it is very possible to get a denser air charge in the intake manifold if you can get the water to properly atomize.

However, like Andre said, that water does take up space also. So you would prob be left with little benefits.

A calorie: "The energy needed to increase the temperature of a gram of water by 1 °C"

"Water is also commonly expressed as 539.423 calories per gram"

So the amount of energy absorbed by one gram of water during a change of phase is the same amount that it takes to raise the temperature of that same amount 539.4 °C. Of course, water will vaporize at 100°C but that just goes to show... The amount of energy absorbed is extremely high.

:sigh:

I'm done here as it seems no one listens.

I will leave you with this:

CO + OH ==> CO2 + H
H + OH ==> H20
H2O + O ==> H2O2
H2O2 ==> OH + OH
And Repeat.

If you know the physics and chemistry behind an IC engine it should be all the proof you need.

Fancy.

What is your point? The temperature that water reaches in a gasoline engine is not hot enough to chemically detach the hydrogen and water, the bond is very strong and takes extremely high temperatures.

I understand that water is a byproduct of normal combustion. But please explain your reasoning.

I have heard of people running injection on a NA engine, but I am going to see if there are gains. Here comes google.

From Aquamist:



So if you were running a compression ratio that would require a suppressant, then it would work. If increasing the timing doesn't result in higher bmep, then more power will not be made.

As I said before, I don't think it will actually result in a power gain that justifies doing it. But hey, we are all a community here! Some people have had gains on some old muscle, so try it out on an SR and post up your findings.