incomplete water injection install update


I have been installing a Water Injection system on my evo over the last few weekends. It is a neat system from Aquamist, one of about four systems they sell. Not done yet but close. Have to connect a wire to one of the fuel injectors wires so the WI can be linked to fuel volume. (If one starts out knowing what they should know, the wiring loom for the WI is fairly simple, I didn't go that route.) Also need to mount the water sprayer in the intercooler pipe. The rest is hooked up.
I found a spot for the pump and assorted accessories on the frame below the stock air filter. It is right beside the washer tank and completely out of view. Looking at the engine from above there is no sign of it. The problem with this location is you need to remove the engine undercover tray to do maintenance, and you will need to do preventive maintenance about as often as you change the oil. You also need to replace the undercover tray to keep the system dry. I felt the hidden instillation was worth it.

The complaint with WI is, what happens when the water goes dry. I bought the DDS 2 package. Which monitors the flow of water right before it is injected in the pipe. It also can "inform" an aftermarket ECU to change fuel or boost maps if something looks wrong. With wi the idea is you retune the air fuel ratio for a better power mix, reset the timing for a bit more advance, and or, more boost. If the water quits the motor no longer has over rich fuel to cool the cylinders and lower timing to protect the pistons. If your not watching it, you smoke the engine.

So you see you need an aftermarket ECU to retune the motor, and the ability to return to normal tune if the water injection fails. With the new ecu you don't need the special "do it all" wi system though. Because the new ecu will be able to map the wi to boost and rpm or fuel. There are wi systems that can be driven from the fuel injectors and boost and notify you when there is a problem, thus don't need an ecu, but since you need the ecu for tuning you might as well use it to drive the wi too.
Why do wi at all? WI should allow higher timing and better fuel mix= more power, cleaner exhaust, cooler charge air, cylinders no longer flooded with fuel to keep from preignition problems and thus less fuel washing the bores. In a list of mods, it would be one of the first things I would do, of course it also means a new ecu, might as well do an exhaust...
Most tuners will balk at WI. Because if it fails and you are a normal guy, you will run it, not working, till it cooks. Then you will blame them.
Many links on the web, I tend to like the Aquamist:
http://www.aquamist.co.uk/
and a board:
http://waterinjection.info/phpBB2/in...2f505602ebe300

 

WORKS would sound about the best to do ,since with the brainflash it controls everything.

 

right, Works has an Aquamist kit they sell, and I believe their p2 is what runs it, I really don't know anything other than what is on their web site, about it. Buying a system made up for the evo is a good idea, specialy if instillation or instructions are provided.
I have not heard anything about results of their setup. Most aftermarket ecu's and piggybacks will or can run a WI system. But you have to give Works credit for developing wi in their products.

 

I'm also panning on buying the Aquamist 2d sytem. I have an idea on how to save the motor with the stock ECU. I have an HKS S-AFR. I'm thinking you could wire the aquamist sensor to a 2-way switch.
Here's the basics: Stock ECU (Dynoflashed to 11:1 AFR), HKS S-AFR leaned out to 12.5:1,
Have the aquamist wired to the 2-way switch so that incase of blocked jet, out of water, etc., the 2-way switch would by-pass the S-AFR which would bring the stock ECU rich AFR back on.
Sounds good in theory, any input?

 

There's an article in Modified Mag - March 04 issue about an 600hp Evo. It also has an Aqumist kit in it. He is using an AEM EMS Standalone and UEGO wideband controller. If you haven't seen the article the car is super clean. Good luck

 

hello again,
the water system is up and running. I have the 2d plus dds2 built by Aquamist. the dds is a little dash monitor that indicates when boost is happening and if and when water is injected. in case of a failure of the water system you can protect the motor. the 2d has a computer that links water injection with boost and fuel injector duty.

had to backtrack a little to find out why the system wouldn't work, seems I assumed one of my mounting points would be grounded automaticly - it wasn't.

a very well designed and built system. nice pieces throughout

well, aside from a different exhaust note can't remark as to improved performance - yet. have not got a new ecu installed so I don't have a way of tuning fuel or timing.

in a drive down the freeway it became clear how difficult it is to stay on boost for very long. that is if your don't want to attract to much attention. since wi comes on at about 10 psi, time on boost is even shorter. which leads me to wonder how effective money spent on wi, intercoolers, piping, ecu s etc. could be, unless one drives on a road course. at least wi has a few advantages beside performance. however this car is intended for road course lapping whenever I can get the time. my mods will be the ecu, wi, and exhaust

 

bishiboy,
as you may have already found out the 2d has a couple of ways of doing just what you describe. at least it can create a signal from a problem and say activate a diverter, cut your boost. so maybe you could mount the hks somehow so it is switchable electronicly

 

You can also control your WI with this, it's sold by lancershop.com
BMan.

lancershop

The e-Boost is the worlds first re-programmable boost controller utilizing FLASH memory technology, making it compatible with future software upgrades, meaning your e-Boost will never be out-dated. The e-Boost is more than just the best performing electronic boost controller, it is a complete boost management system, making Turbosmart a world leader in boost control systems. That's right folks this is a boost gauge & boost controller in the same package.

This revolutionary product is loaded with features, squeezed into a package small enough to fit in the palm of your hand: The latest in Hi-tech electronics, featuring a 16 bit RISC based FLASH memory CPU

– faster and smoother boost response Utilizes the latest in surface mount technology

– lighter, smaller and ultra compact Electronics are housed in an anodized billet aluminum alloy housing

– offering durability and reliability in harsh race conditions Programmable gate pressure function to totally eliminate wastegate creep

- you tell the wastegate when to open Three internally or externally activated and individually programmable boost set points Drag racers

- improve your launch, run a different boost in each gear High accuracy boost and vacuum display, readout accurate to within +/- 0.5% of full scale, boost gauge no longer required

– great value Readout can be tailored to suit your needs – display can be configured in KPA, Bar or PSI Easy to read seven segment display with programmable bar graph and glow in the dark buttons Programmable auxiliary output

– e.g. water spray control, water/methanol injection, boost light Programmable audible warning alarm

– excellent for over-boost warning or full boost confirmation Peak hold/Max Boost recall function Revolutionary gauge type construction allows many practical mounting solutions

– 66mm in diameter 55mm long. Suitable for Panel mounting, or in any 2 5/8 inch gauge pod or pillar mounting system.

 

yeah, pretty neat applicaton, would work well with wi. although you would still want to fool with afr and or timing. if you already had those tools this would be a good approach.