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Old 07-30-2006, 10:51 PM   #1
mycotopian
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Default What about a WI setup triggered by AIT?

I have been thinking about setting up an intercooler sprayer to trigger off of a thermocouple placed immediately before the throttle body. I set the temp and the IC Sprayer comes on until temps are back below that temp. Can a water injection setup be used just as effectively or would the sudden changes caused by the water be dangerous?

I would really only be looking for the octane boost from 91-93 and the knock protection on hot days and extended runs. My thought is to introduce the kit AFTER the car has been tuned. That way if something fails I'm not SOL. I would just tune for an average day but the way these heat waves have been coming in SoCal I am afraid a tune for an average day may lose a ton of power and could potential increase knock.

Am I on the right track with this or should I just stick with the IC Sprayer?
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Old 07-30-2006, 10:59 PM   #2
ShaggyGT
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If your looking for a system that will prevent detonation I would look at the Aquamist 1s system. It comes with a smaller jet and is a pretty basic system that can easily be upgraded to a more complex system down the road.

-Matt
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Old 07-30-2006, 11:03 PM   #3
hippy
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Imo there's no reason to inject just when the charge temp is hot. If ya inject when people normally would with water/alc injection(like above a given boost), the charge temp would be cooler all the time(which would help performance), and not just when it needs to be cooler. Being tuned for it would also give more power instead of hurting performance by not being tuned for it.

Also imagine if the air temp was too hot at idle....... That could be bad.

peace
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Old 07-30-2006, 11:26 PM   #4
mycotopian
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Quote:
Originally Posted by hippy
Imo there's no reason to inject just when the charge temp is hot. If ya inject when people normally would with water/alc injection(like above a given boost), the charge temp would be cooler all the time(which would help performance), and not just when it needs to be cooler. Being tuned for it would also give more power instead of hurting performance by not being tuned for it.

Also imagine if the air temp was too hot at idle....... That could be bad.

peace

Hippy

Wouldn't injecting only in high boost leave me still at risk on hot days when I am not under heavy boost? By triggering off of the Air intake temp I was hoping to keep the car in an ideal intake temp range under all conditions. It does make sense of course to spray under boost because thats when you need it most but running 91 octane crap gas here in Socal I just want more protection. In your exaple of being too hot at idle a retail kit would let me cook. The setup I have in mind would spray to keep things under control, or would spraying at idle be bad? Keep in mind I will most likely be using a very small jet.

I am totally new to the injection game so bare with me if I am not making any valid points. I am breaking in my Crawford S2 after losing the stock motor det so this time I want to have a little safety net.

Last edited by mycotopian; 07-30-2006 at 11:34 PM.
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Old 07-30-2006, 11:53 PM   #5
hippy
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Air intake temp shouldn't be a problem when not on boost. Boost(or compressing air) is what creates heat in intake air(except for idle heat soak which never hurt anything). I don't think your engine will blow while not on boost(especially from warm air) unless something is really wrong with your tune. If you're gonna use water injection, take advantage of it. You don't have to tune agressively enough to bein dannger of knocking if everyting works well, but that doesn't mean you can't get some more power and cooling from injection.

On the note of misting at idle, there's so little flow and load that it would probably be a bad idea/not worth it, and it probably wouldn't do much for intake air temp either. Even with an intercooler spray, the intecooler isn't cooled a good amount unless the car is moving, cause there needs to be a good amount of air passing the water to help it evaporate quickly. Kinda like if ya got out of a hot shower in a room with a 1mph draft. You wouldn't get cooler nearly as quick as if the draft was 4mph.......

peace

Last edited by hippy; 07-31-2006 at 12:10 AM.
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Old 07-31-2006, 08:03 AM   #6
Coolingmist
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I dont really think its my place to say whether you should inject based on AIT or not. Thats up to the customer. If thats something you want to do or have an interest read on.

For those interested our controller can work off of AIT. We have a special attachment sender that will detect AIT from 0 to 255. You can set in our software what AIT to start injecting, what AIT to come on full pressure. You can also (and its recommended) run it in 2D mode with boost.

For example, you can make the system inject from Temp A to temp B....Maybe from 100 F to 180 F (after 180 its always at max pressure) but ONLY when you are above X amount of boost...Maybe 1 psi. You can do it in reverse as well, to run off of boost but only when AIT is above a certain degree. By running in 2d mode you dont have the problem of sitting at idle and injecting.

At some point we will have the system on our site, but its available now. Its our stage II kit + a special sender we have.
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