Water Injection

[macka'sxr6t]

Just love what the Exede has done for my ute

I was wonding if Lok could give me an answer on whether the Exede ecu is able to control a water injection system. eg comes on at a preset boost level and have the ability to give warning of low water level and limit boost level until refilled.

[SR-71 Blackbird]

  macka said:

Just love what the Exede has done for my ute

I was wonding if Lok could give me an answer on whether the Exede ecu is able to control a water injection system. eg comes on at a preset boost level and have the ability to give warning of low water level and limit boost level until refilled.

Why would you need to use water injection. The addition of water to the intake charge reduces power. If correctly tuned there should be no reason for needing water injection?

[TURBO4LT]

  SR-71 Blackbird said:

  macka said:

Just love what the Exede has done for my ute

I was wonding if Lok could give me an answer on whether the Exede ecu is able to control a water injection system.  eg comes on at a preset boost level and have the ability to give warning of low water level and limit boost level until refilled.

Why would you need to use water injection. The addition of water to the intake charge reduces power. If correctly tuned there should be no reason for needing water injection?

Are you 100% sure??

[macka'sxr6t]

I think that you'll find that WI should actually get an increase in performance. If it is done properly. Right water ratio to injector flow. Water injection is used as a air charge coolant that allows you to run higher boost and more aggressive timing and leaner A/F ratios or run higher boost on lower octane fuels with out the fear of detonation.

Not all fuel is burnt during ignition no matter how good the tuner is. The fuel that is not burnt actually acts as a coolant within the cylinder, this is why the T runs so rich. to help keep engine protection at a maximum.

Water injection actually slows down the burning process and provides you with more oxygen rich air because of the lower air charge temp and the release of oxygen during the evapouration process. This would allow you to have greater control over A/Fuel ratios and timing, while still helping reduce heat within the combustion process and engine components

The tuners stop at a certain A/F ratio because that is the highest power that they can achieve safely before detonation and damage it causes to the engine, not because that is the maximium power that they can get out of the engine

If you use water injection in conjunction with an effective IC air charge temp would be greatly reduced giving you greater engine protection while running aggresive tuning and higher boost levels.

It would be more benefical during staging than external water sprays because you don't need air passing through the IC to keep air temp down.

That is why I have made this post to find out if the Exede is able to control the operation of the water injection system eg switches on at a preset boost level or air charge temp.

[TURBO4LT]

macka

Im sure I have read in autospeed that the xede can do what you want try there website.

[macka'sxr6t]

Thanks I give them a try.

What are your thoughts on the WI you running a high power output machine.

[CHIPS]

....Love your train of thought there Macka!!

Mark.

[Guest LOK@ChipTorque]

Hi macka',

Sorry, I've been up north tuning and missed your post. There is an additional output which can be configured (usually) as "On/Off" Intercooler Water Spray Control but also as an injection controller in milliseconds of "On" time. The XEDE unit would need to come back to ChipTorque or a dealer to be modified for the later function. The output is controlled as an additional MAP by the XEDE and as such, can be turned on in any combination of Boost and RPM and for whatever time is available at that RPM.

Water injection on an XR6T is not something that we have experimented with and you generally need the extreme precision of say an "Aquamist" system to generate the sort of results to make it worthwhile. I suggest it would take a bit of testing and a lot of care when adjusting your timing and AFR's etc. in setting it up.

Regards

Lachlan Riddel

[SR-71 Blackbird]

  macka said:

I think that you'll find that WI should actually get an increase in performance. If it is done properly. Right water ratio to injector flow. Water injection is used as a air charge coolant that allows you to run higher boost and more aggressive timing and leaner A/F ratios or run higher boost on lower octane fuels with out the fear of detonation.

Not all fuel is burnt during ignition no matter how good the tuner is. The fuel that is not burnt actually acts as a coolant within the cylinder, this is why the T runs so rich. to help keep engine protection at a maximum.

Water injection actually slows down the burning process and provides you with more oxygen rich air because of the lower air charge temp and the release of oxygen during the evapouration process. This would allow you to have greater control over A/Fuel ratios and timing, while still helping reduce heat within the combustion process and engine components

The tuners stop at a certain A/F ratio because that is the highest power that they can achieve safely before detonation and damage it causes to the engine, not because that is the maximium power that they can get out of the engine

If you use water injection in conjunction with an effective IC air charge temp would be greatly reduced giving you greater engine protection while running aggresive tuning and higher boost levels.

It would be more benefical during staging than external water sprays because you don't need air passing through the IC to keep air temp down.

That is why I have made this post to find out if the Exede is able to control the operation of the water injection system eg switches on at a preset boost level or air charge temp.

Water injection I have found at best to be a band aid solution. As including water to the intake charge will reduce the volume of air and combustable fuel. It does increase reliability of low octane fuel and high inlet temperature to allow more igniton advance but won't be burnt in the combustion. If the water was split into hydrgen and oxygen and ignitable I believe this would be very bad. Happy to be proven wrong have read this in engineering superchargers book.

[macka'sxr6t]

I understand where your coming from SR-71 Blackbird.

But I feel there could be some good results to be gained from the T considering it's Intake restrictions and lack of suppliers and competitive prices to make upgrading the IC a fiscal option for most T moders. The only options at present are APS & Nizpro who offer intercooler upgrades and they are quite expensive if you want to purchase seperately. Which is OK because they have done a lot of R&D and need to recoup costs and are both great products in their own right.

You can purchase a Aquamist Water INJ SYS 2C Comp Kit & Race pump for $1084 + GST that uses a map to control it operation. Which Lachlan has posted the Xede can do.

As nowone has tried it yet I think It would be a good experiment. There seems to be no reason why there should be no performance gain.

Here is a link that has some good info for those that would like to read it and they can make up their minds and hopefully post their thoughts.

Let's keep the Brain juices flowing. :lol:

WaterInjection.doc