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Old 10-08-2005, 03:37 AM   #1
25rsESP
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Default water injection help

i want to put a water injection kit on my car but i cant decide wich one is better. Aquamist or snow performance. I know aquamist is the more commonly used kit but the snow performance kit seems a litle more straight foward and easier to use. Can anyone share some experience with any kit?
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Old 10-08-2005, 08:46 AM   #2
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I'd say go with Aquamist if you can afford it, you will not go wrong with them, they are the leaders in the business of water injection. Most of all the other brands are copies/knock offs of the Aquamist kits and seldom come close in quality. I'm not saying the others won't work but you get what you paid for. I have the Aquamist 2d system in my RS-T, very pleased, great setup.
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Old 10-08-2005, 01:51 PM   #3
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Would you gain any good power gain out of it a WI without force induction? Or is this just to give force induction the ability to run leaner?

HEX
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Old 10-08-2005, 03:11 PM   #4
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its pointless to put water injection on an NA motor
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Old 10-08-2005, 04:02 PM   #5
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Water Injection is just another way of cooling your shizzle right?

Quick question, do you have to keep refilling your water resivoir or...?

Mabe I should read a little more on WI...
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Old 10-08-2005, 05:15 PM   #6
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Quote:
Originally Posted by Sko
Water Injection is just another way of cooling your shizzle right?

Quick question, do you have to keep refilling your water resivoir or...?

Mabe I should read a little more on WI...
Yes.
Yes.
Yes.
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Old 10-08-2005, 09:06 PM   #7
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Coolingmist and Snowperformance sell WI kits for NA cars
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Old 10-08-2005, 09:14 PM   #8
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Only reason you would need WI for an NA car is if your having cooling issues, would give no perforamnce gain unless you had high compression pistons, new cams, etc.
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Old 10-08-2005, 09:59 PM   #9
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Quote:
Originally Posted by Sko
.... unless you had high compression pistons...


THAT is the only reason to use W/I on a N/A motor. That is why it is advertised for diesel engines on the www.snowperformance.net website... most diesel engines have 20:1 or more compression....
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Old 10-09-2005, 01:06 AM   #10
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Water injection does increase your fuel octane (effectively). However, generally you have to have maps that really utilize it on an NA car and even then you are not looking at huge gains.
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Old 10-09-2005, 03:57 AM   #11
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I think I might go the extra mile and have WI installed w/ my turbo setup... I seriously doubt I will have any issues after I have correct tuning w/ EM, an intercooler, nice turbo kit, and water injection. Man... I can't wait til I pop my hood and see all this shiz.
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Old 10-09-2005, 01:37 PM   #12
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OOOH! Another WI myth thread! I love these!

WI on NA motors does some pretty bad stuff.

You have to remember that water is pretty much non-compressible... a fluid taking up volume and increasing compression anyone?. The water you're injecting will increase compression slightly and cool the cylinder charge. Two of the worst things you could do in an NA motor. Go do some reading on
the ideal gas law.

When the compression increases due to WI you can't really take advantage of it because it's somewhat un-predictable and you can't really make the timing changes needed.

Normally by increasing compression in an NA engine you are increasing the heat (energy) of your burn. It takes more energy to compress that mix. By cooling your cylinder charge you just lost power because you are no longer re-gaining that energy it took to compress the mixture.

WI will take away some detonation in certain situations and prevent over heating... but not for anything or Subarus are ever doing. Let's say you are pulling a 12,000 lb trailer up an 8% grade. You think that's going to put a pretty heavy load on the engine? Water injection will prevent hot spots from forming on the cylinder walls/heads and keep detonation from rearing it's ugly head. As for the diesel engine thing... everything I've said still applies... and last I checked most over the road diesels were turbocharged. Diesel engines are a completely different can of worms though.

There are certain situations where WI works well on NA race engines (endurance racing for one) but if you're in that situation you would be one of those people explaining the finer points of internal combustion theory to me... not the other way around.

In my experience aquamist pumps have withstood the test of time a bit better and seem to deal with contaminanants a bit better than the snow pumps. If you want a good laugh... show the snow website to an engineer sometime. Those people are clearly on drugs and have taken advise from some great snake oil salesmen.

I won't even get into the FI stuff, it's been beat to death, use your search button.
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Old 10-09-2005, 05:53 PM   #13
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Quote:
Originally Posted by no-coast-punk
OOOH! Another WI myth thread! I love these!

WI on NA motors does some pretty bad stuff.

You have to remember that water is pretty much non-compressible... a fluid taking up volume and increasing compression anyone?. The water you're injecting will increase compression slightly and cool the cylinder charge. Two of the worst things you could do in an NA motor. Go do some reading on
the ideal gas law.

When the compression increases due to WI you can't really take advantage of it because it's somewhat un-predictable and you can't really make the timing changes needed.

Normally by increasing compression in an NA engine you are increasing the heat (energy) of your burn. It takes more energy to compress that mix. By cooling your cylinder charge you just lost power because you are no longer re-gaining that energy it took to compress the mixture.

WI will take away some detonation in certain situations and prevent over heating... but not for anything or Subarus are ever doing. Let's say you are pulling a 12,000 lb trailer up an 8% grade. You think that's going to put a pretty heavy load on the engine? Water injection will prevent hot spots from forming on the cylinder walls/heads and keep detonation from rearing it's ugly head. As for the diesel engine thing... everything I've said still applies... and last I checked most over the road diesels were turbocharged. Diesel engines are a completely different can of worms though.

There are certain situations where WI works well on NA race engines (endurance racing for one) but if you're in that situation you would be one of those people explaining the finer points of internal combustion theory to me... not the other way around.

In my experience aquamist pumps have withstood the test of time a bit better and seem to deal with contaminanants a bit better than the snow pumps. If you want a good laugh... show the snow website to an engineer sometime. Those people are clearly on drugs and have taken advise from some great snake oil salesmen.

I won't even get into the FI stuff, it's been beat to death, use your search button.

So just to reenforce this, your saying NA WI is bad, and Turbo WI is good?
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Old 10-09-2005, 06:23 PM   #14
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Mostly
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