Let the questions begin...

 

So do you have a question or are you gonna answer questions?

EDIT: Actually you should have started with somthing like this( see below).. and then asked for questions and answers...


What is water injection?

Water injection is a technology that is nearly as old as the car itself. However, like many automotive technologies, it has waxed and waned as fashion has dictated. Water injection has the ability to suppress detonation, allowing the use of higher cylinder pressures. It is easy to control and relatively simple to install. In times of tight emission controls, decreasing fuel octane and rising petrol costs, water injection is one of the best ways of controlling detonation. And it has another major advantage over taking other approaches - the 'fuel' is available at almost zero cost!

How it Works

Water injection is used to suppress detonation. Detonation occurs when the flame front does not burn progressively across the combustion chamber but instead explodes into action. This causes a massive and sharp increase in combustion pressures which can damage pistons, rings and even heads. Detonation can sometimes be heard as a 'tink, tink' sound coming from the engine.

Water injection works in three ways. Firstly, when the water is injected into the intake system prior to the cylinder head, the small droplets absorb heat from the intake air. Water has a very high specific heat rating (it can absorb lots of energy while only slowly increasing in temperature) and so the intake air is initially cooled. Next, the small drops of water start to evaporate. Water has a very high latent heat of evaporation (its change of state absorbs a lot of heat) and so the intake air charge is cooled still further. Finally, when the remaining water droplets and water vapour reach the combustion chamber, steam is produced. This acts as an anti-detonant and also keeps the interior of the engine very clean, so preventing the build-up of carbon "hot spots".

Water injection was first experimented with in the 1930s. At the time it was discovered that detonation could initially be prevented by enriching the air/fuel ratio. As cylinder pressures rose still further and that approach ceased being effective, the injection of water into the intake air stream was found to prevent detonation. Interestingly, the detonation remained suppressed, even if the air/fuel ratio was then leaned-out. This occurred because the excess fuel was being used to cool the combustion process. When water replaced fuel in performing this function, less fuel was then required.

This has major implications for both emissions and fuel economy at high engine loads. In fact Saab on some of their recent turbocharged cars has used water injection at high loads in conjunction with leaner air/fuel ratios to reduce emissions output and improve fuel consumption. To put this another way, at high engine loads it is possible to reduce the amount of fuel being used, replacing it with water without sustaining any loss of power!

--excerpt from autospeed.
So what is alky and methanol injection relate to water injection?

well they are the same , the diffrence is the type of liquids used on the resovoir.

Methanol has ability to act as a secondary fuel as well as a very fast cooling agent, problem is that 100% methanol is very expensive and its not feasable to run every day

Alky , is a type of alchohol used primarly to decrease the temperatures of the charged air , although cheaper than methanol , it will vaporize a lot faster than methanol or water thus not having the same level of efficiency in cleaning your motor and preventing detonation.

So what is the recommended mix

Usually under regular summer weather's you want to use up to about 40% methanol with a mix of water. There are some pre-mixed solutions out there are around $1.00 a gallon, its called windshield wiper fluid ( check the bottle to make sure its methanol and not other types of alchohol as well as other chemicals that may harm your car)

Racing/Drag Racing : 100% methanol

Auto-X I would use straight distilled water with a diluted alkyl solution.

The above recommendations are based upon observation , if you have a better observation on what we should run please go ahead and post.

Thats why this forum was created. For communication for us old school peeps running these types of systems

 

I am very knowledgeable in the field of injection and want to see the scions benefit from it...

 

i am considering doing it with my blitz sc. the kit replaced the stock plastic manifold with a metal one and there is no way to add an intercooler. the problem with adding injection is that the only pre-drilled and tapped hole is on one end rather than the center, which means that i should drill a new one in a central location away from the ports. drilling a new hole means taking off the manifold and getting a new gasket so that i can be sure that no bits of metal make their way into the engine.

it looks like the PWM kits are far more expensive than the simple on/off ones so i will probably go with the latter an a 60cc injector (as recommended by blown_xa https://www.scionlife.com/forums/vie...ater+injection).

i have a megasquirt that i had been planning on using for management, but i am reconsidering. i saw an injection system that did not need a controller as it was controlled by the manifold pressure. is it better to tie the injection to the management or allow it to be controlled by boost pressure? the pressure mecahnism would be easier for me because then i would not have to wait to finish the MS.

thanks

 

oh yeah. does anybody recommend any brands or sellers in the states?

 

when i had the Blitz charger, I ran the nozzle before the throttle body, after thr mas air sensor, that way it cools the supercharger nicley

 

blown_xa, that is interesting and easier. how long did you run it like that?

do other people do that in other cars?
are there any disadvantages?

i will call blitz to ask whether their compressor likes water.

thanks

 

the way blown xa describes is how most users use the kits...the only disadvantage is that you need a tune and you will make POWA haha...