Water Injection Systems
Thread Starter
Race Director
Joined: Oct 2004
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From: Retired but working
Cruise-In VI Veteran
Water Injection Systems
Crazy question, 
but has anyone tried water injection.
I know some rally cars use it overseas and it's standard on some Saab models.
Worked at a WWII aircraft museum and the aircraft recip engines used it.
Supposedly it works great on turbo and supercharged engines and on FI engines and aspirated engines it produces 25-30% more HP.
Just wondering.
but has anyone tried water injection. I know some rally cars use it overseas and it's standard on some Saab models.
Worked at a WWII aircraft museum and the aircraft recip engines used it.
Supposedly it works great on turbo and supercharged engines and on FI engines and aspirated engines it produces 25-30% more HP.
Just wondering.
Night Owl for life
Joined: Nov 2003
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From: Bugs Bunny should'a made a left turn here
I had the Spearco system back when I had my Talon. It was a simple but effective unit.
I don't think it makes any power per-se, but on FI it allows you to run more boost as it cools the charged air. I am not sure if it can be used on NA engines...perhaps others have tried it?
I don't think it makes any power per-se, but on FI it allows you to run more boost as it cools the charged air. I am not sure if it can be used on NA engines...perhaps others have tried it?
Melting Slicks
Joined: Nov 2003
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From: Atlanta GA
i think he might be talking about water injection into the cumbustion chamber area...allowing the temps to drop and allow for more fuel/power...they did this with the WWII aircraft to get more power from them. It was also used on many passenger airliners that had turbin engines (same concept), they would use the water for take off mainly, and they would go through thousands of gallons really quick.
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Thread Starter
Race Director
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From: Retired but working
Cruise-In VI Veteran
Originally Posted by red97vette
i think he might be talking about water injection into the cumbustion chamber area...allowing the temps to drop and allow for more fuel/power...they did this with the WWII aircraft to get more power from them. It was also used on many passenger airliners that had turbin engines (same concept), they would use the water for take off mainly, and they would go through thousands of gallons really quick.
red
red
Supposedly there is a company called Aquatune or something like that that make a system.
I was reading a bit about it regarding rally cars and everyone seemed pleased with the operation of these water systems and the power they produced.
Thanks
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From: Utah
One factor that has to be considered is that water vapor in the intake makes the available charge more dense (heavier) and thus slower to move. The theory for power is to suck the maximum qty. of air + fuel inside the cylinder on the intake stroke, so on n/a engines the H20 is going to slow the rate at which the charge can enter the cylinder as well as consume space that would otherwise be filled with fuel vapor. Without forced induction the only benifit I,d see from the water would be controling detonation, through cooling the temp of the cylinder, and then the water would clean away carbon deposits from the combustion area sort of like a steam cleaner. The carbon deposits can contribute to detonation. So the only possible increase in power would be if you could advance the ignition timing because the detonation was eliminated better.
Melting Slicks
Joined: Nov 2003
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From: Atlanta GA
Originally Posted by Apollo's Chariot
One factor that has to be considered is that water vapor in the intake makes the available charge more dense (heavier) and thus slower to move. The theory for power is to suck the maximum qty. of air + fuel inside the cylinder on the intake stroke, so on n/a engines the H20 is going to slow the rate at which the charge can enter the cylinder as well as consume space that would otherwise be filled with fuel vapor. Without forced induction the only benifit I,d see from the water would be controling detonation, through cooling the temp of the cylinder, and then the water would clean away carbon deposits from the combustion area sort of like a steam cleaner. The carbon deposits can contribute to detonation. So the only possible increase in power would be if you could advance the ignition timing because the detonation was eliminated better.
red
Safety Car
Joined: Oct 2004
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From: Plano TX
I had a 68 Big Block Buick years ago with a 10.25:1 compression ratio. The Spearco Water Injection prevented pre-detonation/pinging and allowed you to advance the timing a few clicks.Could not really tell if the engine made much more horsepower or not.
Supporting Tuner
Joined: Sep 2004
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Benpup, I would cross post this thread in C5 Tech. Really sharp tech folks over there - you will probably get a dinitive answer - either yea or nay.
My 2 cents worth
EG
My 2 cents worth
EG
Melting Slicks
Joined: Sep 2003
Posts: 2,458
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From: Northville Michigan
Jim,
Lingenfelter has recently added a water injection system to their twin-turbo 427s. By doing so the engine's horsepower rating has been increased from 750 to 850. The system they use is manufactured by AquaMist.
AquaMist's literature states that their system can be used on naturally aspirated engines.
Merry Christmas everyone.
Lingenfelter has recently added a water injection system to their twin-turbo 427s. By doing so the engine's horsepower rating has been increased from 750 to 850. The system they use is manufactured by AquaMist.
AquaMist's literature states that their system can be used on naturally aspirated engines.
Merry Christmas everyone.
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
AquaMist may "make" (read: allow) 100 more horses - but it costs...
Aquamist water-injection system, $1640;
HERE is an excellent thread about water and alcohol injection from the C5 FI/Nitrous Forum (I hang out over there a lot)
EG
Aquamist water-injection system, $1640;
HERE is an excellent thread about water and alcohol injection from the C5 FI/Nitrous Forum (I hang out over there a lot)
EG
Last edited by EG@EnglandGreen; Dec 15, 2004 at 07:59 PM. Reason: added link
