My alcohol/water injection setup.
Here are the long promised pictures of the various parts I used to inject water/alcohol.
Total install time is 8hrs. Materials run about $1000.00 Feel free to ask questions. The arming switch. When in the "ON" position, the pressure switch is energized. http://i21.photobucket.com/albums/b2...mingswitch.jpg The Spec C tank with the pump attached to it. http://i21.photobucket.com/albums/b2...Stuff/Tank.jpg Adjustable pressure switch. http://i21.photobucket.com/albums/b2...uff/Switch.jpg And the injector nozzles. THis was my initial set up, but I switched to one nozzle that screws into the bottom-side of the I/C. http://i21.photobucket.com/albums/b2...ff/Nozzles.jpg |
Paul... we'll be talking come spring. :devil:
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Nice setup Paul. Maybe we can get a group buy!
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For those that don't know what the heck this does, would someone please explain? Thanks.
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Water/methanol injection raises the effective octane of the mixture. It cools EGT's and allows you to run more boost and timing I believe. I think it can raise your HP like ~20%.
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The short answer is that it makes the car behave as though you were using higher octane fuel by injecting water or a water and alcohol (or methanol) mix into the cylinders along with the fuel.
Compare the last two graphs on this page: http://www.pdxtuning.com/sti_dyno.htm This site is a good place to start for more info: http://www.waterinjection.info/ |
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Very nice paul, I'm a fan of Aquamist kits ;)
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Josh...I'm sorry I missed you.
You back in ROK yet? A group buy could be done as long as I can get cooperation from a few wholesalers. I'd imagine that the price/unit would drop a bit, as well as my labor rate. Also, as this would be special order item, I'd like an XX% deposit, depending on the total number of kits requested. In addition to the basic kit, about 20' extra feet of 4mm tubing, 40' feet of light gage wiring, an inline check valve, and some heatwrap are required. The nice thing about this set up is that it's stealthy, all switches look OE, and is unintrusive; when you pop the hood, you can't see it. The most obvious short coming of this kit is that it's flow rate is linear; too much on the low end, just right where you want it, too little on the top end. There are various ways of controlling the spray delivery better, but obviously they increase the price. Yes, ther are cheaper ways of spraying alcohol/water into your engine, but they're cheap. I've attached an pdf of an old water injection report. While it's printed in engineerese, there's still good information for us less technical types. |
So, what keeps the motor from blowing up when you run out of water, or turn the switch off? This setup doesn't interface w/ the ECU does it?
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"Water pressure LOW!" In big bold blinking letters. My lack of photoshop has stunted this joke. |
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Since the Spec C tank was it's own level indicator float, I've tied in to the stock I/C spray tank circuit. And since I'm using Cobb's AP, if I happen to run out of water/alcohol, I dump the realtime map and all is good. |
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Also, isn't the Spc C water tank big enough that you'll run out of gas before you run out of mix? As long as you keep the water tank topped off anyway.
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Yeah, I'd definately want to have a map switching ability to run this. Perhaps only using it when at the track or autocross, but man would it be sweet to have. Looks great Paul
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While the "running empty" senario is possible, it's not very likely to happen.
I have yet to run the tank dry. I buy a 5 gallon can of methanol, pour half into the old/empty can, and then fill both cans up with distilled water. 10 gallons last me about 4 months. And that's with me driving HWY 49 2X a day. ;) Even during a track day, I only used ~1/2 tank. |
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This is my concern as well. Hopefully ECUtek comes out with switchable maps. Either that or must think of some way to store more alcohol in the car! |
The switch could be equipped with an alarm that indicates the broken circuit (off position). I'm sure a trip to Radioschack would fix that. Other than that, it's just like your oil level. Check it every time you fill up. I like that tank and especially how it has a low indicater. :cool:
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You can put a pressure switch into the nozzle line that detects pressure to the nozzle and if below spec switches a relay that disables the boost control solinoid thus you only run wastegate boost.
Paul are you running the 1s kit or the 2d? From what I can tell anyone running a larger than stock turbo would really want to run the 2d for the progressive rate. Mike |
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