Water Injection

[4sfed4]

Also Larry....make sure you find a good local source for methanol (if you dont already have one). Quite a few speedshops sell it and its alot cheaper than getting denatured alcohol at Home Depot, or isopropyl alcohol at the drug store. Methanol, which arguably works the best, is usually around $3 per gallon. I bought 5 gallons several months ago and havent even used half of it yet. Its dirt cheap high boost fun. Wait till you see your intake air temps on this stuff

[dodgeomniglh]

Can anyone give me an idea of what pieces I need from alkycontrol? I don't see a kit for us turbo dodges....yet. I have a 85 GLHT converted to T2 and I'm going to convert to a 3-bar map & recalibrated logic module at the same time I install this.

Thanks,
Scott

[4sfed4]

You basically need just the TTA kit (as that kit does not include the 3 bar MAP sensor you will already have.) That kit will have everything you need and alkycontrol.com will make the braided lines however long you need depending on where you choose to install the pump relative to the reservoir and nozzle.

[dodgeomniglh]

Cool, thanks a lot. Sorry for the change in topic everyone. I was very tired when I posted last night.

-Scott

[Koreth]

I took a look at the progressive kit, it looks cool, but it ocurred to me that there would be a simpler way to do it - a set up similar to the fueil rail in the intake. Have the pump supplying a constant pressure, have a return line, and then a fuel pressure regulator that methanal won't corrode, and run a vac line to the pressure regulator. Then as boost rises, so will the pressure, and thus the ammount of water/alky sprayed into the intake, just like a the main fuel rail. Maybe a pressure switch too, to shut off injection off when you leave boost, or drop below so much boost. Anybody's thoughts on this?

[Casper]

you'd need either injectors at each port, or a solenoid at each port to completely shut off the water flow through the nozzles.

[Koreth]

I just poked a hole in my own idea. With the mecahnical pressure regulator like the one in the above idea, the pressure raise would be linear in relation to boost. As boost raises, doesn't it travel further away from its island of high efficiency in the center of the compressor map, and thus grow hotter faster? So if the intake temp in relation to boost was plotted on a graph, it would look more like an exponetial curve than just a straight line. Wouldn't you want your pressure to increase expontially as well so as to match the increasing intake temps? I see two ways to accomplish this. One is with a rising rate pressure regulator, or with that controller. (does it do that sort of thing?)

Or is this the job of the ECU to add more fuel because more boost = more air being flowed in = need more fuel? Or should both the ECU and the water/alky injection be doing this?

Or heck, have I overthought this whole affair to where I've completely gotten into theoretical things that aren't important because they have no actual gains in reality when acted upon?

[Casper]

You might want to send your resume to Aquamist...

Actually, I would say you are probably over thinking it. Most of the systems either have some sort of an electronic "rate of gain" controller, or pressure switches to turn on additional nozzles. The second method is a bit less precise, but I don't think it would be significantly less effective.