Ghetto riged water injection.

[Luderacer14]

Has anyone tried to ghetto rig water injection by using the winsheild water reservoir?? I'm thinking about trying it. I mean, it already has a pump and theres a switch inside of your car to turn it on. All you really gotta do is put a fine mist spray nozzle on the end and hook it up to your IC pipe.

[Structure240sx]

i think the problem is that the pump isnt strong enough. people have used it as an intercooler sprayer

[Checkered-Member]

i think the problem is that the pump isnt strong enough. people have used it as an intercooler sprayer

I'll elaborate, a high pressure pump (150+ psi) is needed to create such a fine mist to be used as water injection, stock one is not even close.

All you need is a high pressure pump, high pressure lines, a couple of adapters and a nozzle and you can use the reservoir as the source of water
Modified by Checkered-Member at 9:54 PM 6/14/2005

[214kka-et240sx]

I'll elaborate, a high pressure pump (300-400psi) is needed to create such a fine mist to be used as water injection, stock one is not even close.

All you need is a high pressure pump, high pressure lines, a couple of adapters and a nozzle and you can use the reservoir as the source of water

wtf 300 to 400 psi LMAO, thats wrong ,you can do it with the stock pump, and it really sprays good , so, wat about the fuel injectors , they only get 30 to 50 psi of fuel and that sprays good! i think you have to rethink that one

[AZhitman]

Dude.

Please don't comment on topics you know little about.

The washer pump will NOT support anywhere near 30 psi - more like 5.

Also, fuel line is designed for high pressure, and part of the pressure in an injector results from the pintle movement, whereas windshield washers have no pintles.

[Checkered-Member]

wtf 300 to 400 psi LMAO, thats wrong ,you can do it with the stock pump, and it really sprays good , so, wat about the fuel injectors , they only get 30 to 50 psi of fuel and that sprays good! i think you have to rethink that one

a quick search and most kits come with 150+ psi pumps, there is no way the stock one can produce that much I swear I saw water injection kis with a 300psi pump

[WDRacing]

Water injection is so easy it's suprising how many people don't utilize it. But Checker is correct, the stock windshield pump is a tad inefficient. A cheap shurflo RV water pump will work awsome. Mix that with a Hobbs switch to turn on the pump and maybe a simple rheostat to regulate the pump volume and you have a tuneable water injection system.

WD

[Red-KAT]

This is the one I am going to order.

http://store.summitracing.com/...h.asp

[Florida240sx]

WD didn't you make your yourself?Thought you were going to do a write up on it?Would like some info, if you got the time.Thanx

[fabio420]

Hey, I'm sorry to ask a stupid question, but what is water injection exactly, I mean, I know you combine it with methanol and it helps to cool the engine chemically, but there are some questions I'd like to know and maybe get in on this. Can you run it conjuction with the intercooler? Or does it get rid of it? Can you use all the time, or is it something only for the track? And how much cooler does it get? I guess the water evaporates before it gets to the engine(right?).

[Red-KAT]

Well it does a few cool things... (pun)

Here is a good read.

http://www.rallycars.com/Cars/WaterInjection.html

[Craving4Boost]

fabio...you do not need to combine it with alcohol if you do not want too. if you want to keep it plain and simple you can go all distilled water. all it does it the pump turns the distilled water into a mist to cool down the air keeping away from detonation

[fabio420]

See, that's what I'm talking about. If I can run it just water for cooling in the streets, and methanol mixture at the track, I'll definetly be investing in this. I take overheating very seriously, eventhough it hasn't happedned yet. I made my own heat shield, but the colder the better, right? Thanks for the help.

[DRIFTEADOR]

You can run water alone or a mix of water/denatured alcohol for a little more cooling. A gallon of denatured alcohol is ~$10 at home depot motorsports and should last quite a bit. I've read 3 full gas tanks to a full 1/2gal reservoir but it I'm sure it'll depend on the size/flow of the nozzle. I think methanol combusts too easy and can cause preignition so it's not advised to use.

You can mount everything in the trunk to keep it a little cooler and just run the line to the engine bay. In addition to what wd listed, I'd use a solenoid for better control/response, I don't trust the pump's reaction time. I found some metal body ones for cheap anyways ($28).

hey wd, what's that website where you found the shurflo pumps?

[fabio420]

What % should the mixture of denatured alcohol and water be? Is it different for different amounts of boost/horsepower?

[Checkered-Member]

What % should the mixture of denatured alcohol and water be? Is it different for different amounts of boost/horsepower?

Most common is 50/50 why? Because its easiest to measure

You can use 100% water if you wanted to, alcohol is there to give you a boost in power, water cools better then alcohol.

So if you wanted more power then cooling adjust the mixture accordingly

So lets say you running no intercooler = 100% water

[Florida240sx]

Might mess with this after I get my Vert done.Problem at hand now is timing chain.

[Craving4Boost]

does water really cool better than alcohol? interesting...

[Checkered-Member]

It has to do with the chemical properties of both substances, the latent heat of water (or the amount needed to vaporize water) is 540 calories per 1 gramWhile pure alcohol is 204 calories per gram (the one used in water injection is impure, so the value will be lower), and gasoline is around 90

another factor to consider: since water doesn't burn all 540cal are being used to cool, while alcohol does burn and produces heat at the same time it cools, actual cooling valve is lower then 204….but don’t know how to calculate it

Modified by Checkered-Member at 10:14 AM 6/18/2005
Modified by Checkered-Member at 10:15 AM 6/18/2005

[SonyPete]

Could you really replace the intercooler with a well setup water injection system???

[Red-KAT]

You don't replace the intercooler... The water/alk is just to help prevent the pre det. Its not the end all.

You know you people can do 1-2 google searches and get all this info. That's all most the people who answer did.

And if you damn people would have taken the effort to read what I posted it would have taken out about 4 of the later questions. Freaking lazy.

[DRIFTEADOR]

you know, just about every other topic here can be answered by searching too...but that would be boring and we wouldn't learn anything new. for example, i didnt know water cooled better than alcohol. I figured since alcohol evaporates faster it took more heat out faster.

and btw, Jackson racing (roots type superchargers) uses water injection in place of an inter/aftercooler because it's much easier on their application. so it can replace an intercooler but I agree, intercooler>injection. although intercooler+injection>*

I read the website you posted and it doesn't say what size nozzle to use. what's too little or too much? anyone know

[SonyPete]

I agree with you Redcat about the search function, cause I hate when newbs posts allot of preexsisting questions.I was just asking cause of Checkered_Member post"So lets say you running no intercooler = 100% water"

So I wasn't sure

[WDRacing]

There are very few threads about alcohol or water injection. All of which usually address new idea's, so all of the non-noobs, can quite mentioning the search function. If the post or thread is a repeat or needs to be moved/locked, Fiznat or I will handle it. Until then, post a reply about said topic or don't post at all.

Thanks...

[DRIFTEADOR]

^ ditto

hey wd, what size nozzle are you or will you be using? the one i picked up was i think 3gph but they're rated at 40psi. I'll be running it at about 100.

[WDRacing]

I'd buy a couple different sizes just to play with...better safe then sorry.

[Checkered-Member]

Noob question

Why doesn’t water injection create hydro-lock?

[AZhitman]

Because it is vapor by the time it reaches the CC.

Remember, hydrolock is the result of an uncompressible substance (water) entering the combustion chamber. However, gas (vapor) IS compressible, so there's no problem.

[WDRacing]

It has to be alot of water to, mist or not to lock up a motor.