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Old 08-28-2003, 10:54 AM   #1
RiftsWRX
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Default Navybluesubaru's water injection install: Part 1

After having tuned first hand a car with water injection, I was instantly sold on the performance it allowed! But, the problem was that I wouldn't spend $400+ dollars on a kit.

So after searching far and near, I found the kit that Jeff (Navybluesubaru here on our board) pieced together.

The kit consists of a Shurflow waterpump that has a built in pressure switch that will turn on at 80PSI and shut itself off when it reaches 105PSI. It flows ~80GPH IIRC.

Jeff's kit includes everything that you need to install the kit under your hood, but it is currently assuming that the pump will be mounted in the battery tray (this pump makes the aquamist pump look TINY.....) So, having absolutely no more real estate under more hood (full pics to follow in the offical write up on my site), I decided to locate a 2 gallon 8 oz. gas can I am using as a reservoir, and the pump in the back of my wagon.

I removed the jack and relocated it to the spare tire well, and proceeded to run 1/4" nylon reinforced kynar hose (good to 400PSI at -80F to 300F) under the carpet in the car with the power wire I'll use to power the pump.

After mounting the pump, and putting everything back together, all you see is a wire reinforced polythylene 1/4" tube coming out the rear liner (good for 60+ in/HG before collapsing).

I modified the gas can by pulling the yellow vent stopper off, leaving a pefect hole for the O.D. of the inlet hose. Then I used self adhesive standoffs on the bottom of the tank, and notched receiver holes into the lower compartment of the wagon. This lets the can's new "feet" lock into their new grooves so that the can doesn't go anywhere. The way it's mounted you completely have full access to all the storage compartments in the wagon, and can be removed all together in about 5 seconds by simply pulling the inlet hose out of the can, and lifting the can straight up out of it's grooves.

The solenoid included with the kit appears to be a very high quality and durable piece made of heavy duty plastics. Just to give you an idea of this things size, it uses 1/2" inlets. Jeff includes all 1/4" barbed adapters, clamps, and hose for the under hood installation. I have a 3M cement I use for acrylics/PVC/rubber which chemically welds the materials together. I used that on all the fittings, as well as the barbs, then followed it all up with the clamps included... the hoses will never leak, but they'll never come off either, so make sure you have everything laid out before doing something like this.

His kit also comes with a master arm switch mounted in a blank to go next to your fog light, as well as the pre labled wiring to connect the pump, solenoid, and UTEC to your new system.

I personally already have my car wired up for stuff like that and declined to use it, but while there are a few things that can be done to refine the electrical ancillary items, for the $250 the kit costs, you can take the $150 savings from an aquamist kit and go nutty at radio shack and still have $100 left over.

The cement will take a solid 24 more hours to properly cure, and I'll be finishing up the electrical soldering tonight, then test run it friday, or saturday. But I just wanted everyone to know about the componentry included with the kit, as well as Jeff's detail work in everything that comes out of the box.

EDIT: oh yeah, the nozzle... Not sure exactly what brand or what configuration it's going to spray, but it's a 5GPH nozzle that I mounted compression style right behind my IAT probe in my intercooler return hose for my hyperflow FMIC. Then proceeded to mount the solenoid right near my cruise control motor.


More later,
Jorge (RiftsWRX)
www.ProjectWRX.com
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Last edited by RiftsWRX; 08-28-2003 at 11:01 AM.
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Old 08-28-2003, 11:11 AM   #2
vile
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nice, are you sure at 80-105 psi, with whichever nozzle you're going to use.....is going to atomize the water?

how's the system set up? is it going to come on at a certain rpm? boost? tp?

also, i'm assuming u'll be tapping the nozzle in at the throttle body, between intercooler and butterfly plate?
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Old 08-28-2003, 12:03 PM   #3
RiftsWRX
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Quote:
Originally posted by vile
nice, are you sure at 80-105 psi, with whichever nozzle you're going to use.....is going to atomize the water?

how's the system set up? is it going to come on at a certain rpm? boost? tp?

also, i'm assuming u'll be tapping the nozzle in at the throttle body, between intercooler and butterfly plate?
Quote:
oh yeah, the nozzle... Not sure exactly what brand or what configuration it's going to spray, but it's a 5GPH nozzle that I mounted compression style right behind my IAT probe in my intercooler return hose for my hyperflow FMIC. Then proceeded to mount the solenoid right near my cruise control motor.
That should answer your placement question.

As for how it's fired, I'm going to use the UTEC's spare solenoid control functions to facillitate it.

For now, the conditions to fire will be: >50%TP, >14PSI, >3000RPM

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 08-28-2003, 12:23 PM   #4
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Don't forget to add some sort of filter to keep out the junk 'n stuff.
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Old 08-28-2003, 12:43 PM   #5
RiftsWRX
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Quote:
Originally posted by hotsam
Don't forget to add some sort of filter to keep out the junk 'n stuff.
The nozzle comes with a micron filter attached to it, but I'll probobly end up plumbing in an inline .5 micron filter between the solenoid and the nozzle later on (just need to recoup some $$$)

Plus I'm only going to use winterized washer fluid, which is already distilled and purified.

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 08-28-2003, 12:54 PM   #6
WRX-U
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Question Windsheild washer fluid

I am guessing that it is safe to run washer fluid with this then right?

Just gotta double check......
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Old 08-28-2003, 04:10 PM   #7
hotsam
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Default Re: Windsheild washer fluid

Quote:
Originally posted by WRX-U
I am guessing that it is safe to run washer fluid with this then right?

Just gotta double check......
Yup...that's not a problem at all. Like Rifts said, it's pretty pure, and also the alcohol won't hurt the pump.
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Old 08-28-2003, 09:02 PM   #8
MAD REX
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Can't wait to hear your impressioin after running the kit for a few days.
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Old 08-28-2003, 11:19 PM   #9
Bolster
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So when and where will this kit be available from?
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Old 08-29-2003, 12:08 AM   #10
WRXBob
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I have a similar set up also using a surflow pump. I mounted the pump under the chassis of the car on an L bracket that I made. I uses a two galon gas tank holding by a bracket mounted inside the trunk. The gas tank lid has a quick disconnect mounted to it for easy removal, and With the surflow pump it is self primming and there is no need to gravity feed the pump. The pump is switched on by a aquamist pressure switch which turns on a relay which turn on a solenoid to alow water to pass in to the engine. Off course there is also on and off switch and manual overide too. Right now, I only have the water dripping into the base of the intake manifold through a tiny plastic nozzel that put out about 1/4 water as a .6mm aquamist nozzel. I am getting another pressure switch for another nozzel with a sleeve mounted on to the intercooler.
I am a believer in water injection because my car's (stock) performance is low and inconsistence without the water injection.
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Old 08-29-2003, 12:34 AM   #11
MAD REX
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Quote:
Originally posted by Bolster
So when and where will this kit be available from?

PM NavyBlueSubaru
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Old 08-29-2003, 05:38 AM   #12
SJwrx
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Is this kit for the "highly modified" cars, or is this an option for a car with basic bolts on goodies and engine managment?

Is this setup only for UTEC users?

Rich
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Old 08-29-2003, 10:55 AM   #13
RiftsWRX
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Quote:
Originally posted by SJwrx
Is this kit for the "highly modified" cars, or is this an option for a car with basic bolts on goodies and engine managment?

Is this setup only for UTEC users?

Rich
It wouldn't be too hard to source a pressure switch that could be used to make this a completely autonemous system. But it currently does work on a UTEC..

IMO, seeing how cars have reacted to it.. I think it be really interesting to see how this works on a bone stock car.

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 08-29-2003, 10:59 AM   #14
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Theorectically - if you do not lean out the fuel - WI should allow the octane challenged to run similar maps to those on 93.

I may test this sometime! You would make a fotune in CA if you could prove this!!
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Old 08-29-2003, 11:00 AM   #15
RiftsWRX
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Finished it all up last night and started playing around with this setup. First thing I can think of... I need a larger nozzle... But even with what I'm using I've gone to a static utec timing curve just to experiment. I'm able to run a solid 3 more points timing then I was able to before, at about half an AFR leaner then before. I'm pushing around 11.5:1 at redline right now, at 22 degrees advance at 22 PSI... I used to get knock shifting, (valve body will do that), forcing me to run richer up top, and with less timing to curb the hit, but now I can just run it full tilt to redline.

In light of the aspiration of my motor, I need to get whatever the next larger size is from Jeff and try that out!

But so far.... very promising!

At this point... I NEED to go back to static timing on the UTEC, because the engine noise is so great that the new ECUTEK flash can't filter it out and sort of has itself locked at 19 degrees advance... I'd need to DANGEROUSLY lower the knock thresholds on the UTEC to get it to go up... I'd rather just run a static curve and call it a day... The ecutek flash is currently completely handling fueling.. but until I can get a larger nozzle in there I'm going to let it continue to do it's thing for a while.

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 08-29-2003, 03:42 PM   #16
CMJ
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Default WI

I've herd that some people with minor bolt ons are running water injection and 87octane! With no knock.
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Old 08-29-2003, 03:53 PM   #17
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Did you think about running a low pressure pump to get the water from the tank in the rear up to the main pump in the front? It just seems like a better idea to run high flow low psi pump to get the water from the main storage tank in the back of the wagon up to the front and then run a short stretch of high pressure line. I just have a feeling that the pressure will fluxuate a lot due to flex in the wall of that much high pressure line.

Any thoughts anyone?
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Old 08-29-2003, 04:56 PM   #18
RiftsWRX
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Could be, but the line I used is about as tough as your going to get short of braided. I'm sure there's a pressure drop across 13 ft of line, but if the nozzle is even at 75 or 80PSI from the 100 it is back at the pump, that's still plenty good!

Jorge (RiftsWRX)
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Old 08-29-2003, 05:57 PM   #19
buchananracing
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Default Kit-$350

I don't know if anyone has seen the kit that www.WRXTuner.com
has, but its only $350, check it out. Here's the link:

http://www.wrxtuner.com/default.asp?...&N_Performance
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Old 08-29-2003, 06:31 PM   #20
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Default Re: Kit-$350

Quote:
Originally posted by buchananracing
I don't know if anyone has seen the kit that www.WRXTuner.com
has, but its only $350, check it out. Here's the link:

http://www.wrxtuner.com/default.asp?...&N_Performance
I'm pretty sure it's the same kit. NavyBlue and WRXtuner got together to make some money.
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Old 08-29-2003, 11:11 PM   #21
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Default Re: Re: Kit-$350

Quote:
Originally posted by MAD REX


I'm pretty sure it's the same kit. NavyBlue and WRXtuner got together to make some money.
and they are pimping WI to anyone with an ear, its pathetic
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Old 08-29-2003, 11:58 PM   #22
desiwrx02
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There's no need to "pimp" water injection. It has its place without a doubt. I dont see the need for unneccesary put downs here. People push theyre products, Its how business works. I dont see you crying when Shiv or TurboXS post regarding theyre latest product. So relax. Unless you have clear evidence that Water Injection is a bad thing, please stop talking down on it for no reason.

Im not trying to start anything,or be disrespectful but I dont see how your posts are relevant or belong on the board.

Ajay
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Old 08-30-2003, 12:10 AM   #23
WRXBob
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[Did you think about running a low pressure pump to get the water from the tank in the rear up to the main pump in the front? It just seems like a better idea to run high flow low psi pump to get the water from the main storage tank in the back of the wagon up to the front and then run a short stretch of high pressure line. I just have a feeling that the pressure will fluxuate a lot due to flex in the wall of that much high pressure line.

Any thoughts anyone?]


There is no need for an extra pump. The shurflow delivers a ridiculous amount of water and pressure. On my car, I ran a tiny nozzel out of a alergy mist spray bottle with all the pump all the way from the back of the car an it works. Also all this hype about you have to have enough pressure to 'mist' the water is overrated. If there is room the water will mist, but in a very tight space like inside the intercooler, the water will be come droplets once it hits something. I would think that even as surflow pump is overkill. All that is needed is a pump to have pressure greater then the amount of turbo boost, and let the water drops into the manifold.
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Old 08-30-2003, 12:24 AM   #24
Jon [in CT]
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Is anyone allowed to specify the specific SHURflo pump used, so that we can look at it on http://www.shurflo.com/?
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Old 08-30-2003, 03:05 PM   #25
zaxrex
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Default Try this one

Shurflo 100 psi pump model #8000.543.236
or 8000-543-13

might not be the exact one, but was talked about here .

Another DIY WI system can be read about here . May be the same or similar to the one now, or even the samy guys, I dunno the IRL names.

Last edited by zaxrex; 08-30-2003 at 03:10 PM.
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