Home made Water/Alcohol injection

[S_Ranger]

I did some reading on this. I'm stoked to do this now..

I was wondering if there is a really really cheap route to do this. I know I can get fuel hose free at O'reilys. So now I need a water pump. My car didn't have a washer reservoir tank and neither a pump so I'm starting fresh.

What water pump can I get at o'reilys that will be compatible with alchy/and my cheap ass?

I have more q's but lets get this thread started first.

 

[95blackGsTurbo]

Better question is what do you plan for a fail-safe? Like if a hose breaks at WOT or you all the sudden run out or get an air pocket. Will be like trying to run pump gas on a race gas setup.

 

[S_Ranger]

I guess regular check ups to make sure tank is filled, lines are down good, fittings are tephloned etc.

I read the turbomirage site and got pretty well informed, I'm just in search of what I can use to improvise in place of the fancy water pumps.

 

[winterftbl]

whats your budget?

 

[S_Ranger]

^

For this project I'd say 75 dollars. I know it can be done.

 

[awdrst]

I'd suggest spending some money on a quality pump. I'd suggest shurflo since they are used in a ton of these kits. You can find them online and on sale once and while for 50 or so. I've built these setups for under 100 before but you need to make sure that you spend your money in the right area.

 

[S_Ranger]

Right, the water pump is the main part. The brass fittings I get free because my of my stepdad. Now I need the water solenoid and the adjuster right? Where's a good place to get those?

 

[Defiant]

http://autos.groups.yahoo.com/group/DSM_water_injection/

 

[awdrst]

Get the hobbs switch from napa and I have gotten my solenoids from mcmaster carr for pretty cheap.

 

[S_Ranger]

Thanks for the yahoo group link.

I'll check at NAPA or O'reilys for a "Hobbs switch"... I hope they know what I'm talking about.


Water solenoid is what I'm looking for right? I just want to get the terms down right..

 

[Mr Peepers]

A Hobbs switch is a switch that is boost (or vacuum) activated.

An example:
http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-BCS-003

 

[awdrst]

701-1575 that is the part number (or it was) for napa's hobbs switch. As far as the solenoid make sure it's 12v dc and you will have no problems. I"ll try to find the part number from mcmaster carr for that.

 

[S_Ranger]

^

Thanks guys..

Hey awdrst, I looked at the water solenoids and a whole variety show up on google. Update me on that item please.


Really appreciate the help here..

 

[Defiant]

One of the great unspoken secrets about water is that you don't have to get crazy with pumping it nor controlling it. A huge advantage that a WI engine has over others is that the pistons and combustion chambers are clean. This can be done just by letting a small amount of water be sucked in by cylinder vacuum, all the time vacuum's being created. That can be controlled by a simple needle valve, and on a supercharged engine, with an additional check valve.
When you're trying to control knock on the edge of high-output tuning is when things can get complicated. And of course, if you're using water to control knock, you do have to control its volume and timing very carefully.
A system also has to be arranged so that you can't siphon your water into the cylinders while parked, but this shouldn't be a challenge.

 

[jtmcinder]

Unless you're talking about an off-boost system (see Defiant's post), this isn't going to happen for $75. I don't think you can get a decent pump for that amount.

The "standard" home-made WI system is based on the ShurFlo 100 psi pump. The switch is a NAPA Hobbes switch (as mentioned above) and the nozzles come from a place like McMaster-Carr. An accumulator helps, but many say it isn't crucial; it just keeps the pump from cycling as often.

Oh, and you can't run much more than a 50/50 mix (a la windshield washer blue) if you want the seals in the pump to last.

- Jtoby

 

[spyderturbo007]

Take a look at this.

 

[awdrst]

7876K12 is the part number for a soleniod that I have used in a older setup and worked no problem. Its from McMastercarr.com Just make sure you get the 12v dc one. You really need to shop around and wait for sales on pumps to get this done under 100. Also not saying this is the way to do it but I have used a 60 psi shurflo on my first setup years ago with no issue.

3178K76 is the part number from Mcmastercarr.com for a nozzle. You still need to figure out the size nozzle you need but this number will get you to the nozzles.

 

[S_Ranger]

Can't stress enough how much I appreciate the help ^ Thanks. I'll keep this thread updated if anything changes. I'm gonna start shoppin now

 

[tkelly27]

Ebay has adjustable pressures switches for $5 or so. I have 3, 2 that are 0-1bar and 1 that is 1bar to 2bar.

 

[yekrahs]

I got my kit from aquastealth.com. I only spent 170 and it seems like a nice kit to me.

 

[Spades]

keep in mind the water solenoid is optional depending on your install, if the nozzle is mounted higher than the container it will NOT be needed, its purpose is to stop auto siphoning as defiant mentioned.

I spent a total of $82 on my setup. I get free brass and lines too

 

[PieEyedPiper]

keep in mind the water solenoid is optional depending on your install, if the nozzle is mounted higher than the container it will NOT be needed, its purpose is to stop auto siphoning as defiant mentioned.

I spent a total of $82 on my setup. I get free brass and lines too

What about boost pressure pushing water back into the tank and the pump taking too long to initialize and push all that water back into the UICP when you hit "real" boost? From my readings I'll be including the solenoid for my own kit.

 

[Spades]

What about boost pressure pushing water back into the tank and the pump taking too long to initialize and push all that water back into the UICP when you hit "real" boost? From my readings I'll be including the solenoid for my own kit.

That will never happen, under boost is the exact time the pump turns on, the pump puts out 100psi which easily overcomes the ~20psi boost pressure.

 

[S_Ranger]

To water solenoid or not to water solenoid...