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| Subject |
There's nothing new about water injection, it was first |
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| Posted by |
DAYTONAZ on August 06, 2003 at 3:45 PM |
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This message has been viewed 120 times. |
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| In Reply To |
Water Injection performance update posted by HakenTT on August 06, 2003 at 03:10 PM |
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| Message |
introduced to the reciprocating engine pre WWII in radial engines. Water injection would be used during dogfights to give that extra performance edge when trying to outrun/ maneuver an opponent. Even then it was used only for short bursts because it was known that extended use would result in engine failure due to a lean mixture. So as far as the theory of which environment to use it in, hot, humid, cold, dry, think about the environment a piston driven engine is experiencing at 20-30k feet. Less density, freezing temps, etc. I clicked on your links and read some of the previous responses by other members and most have valid points regarding your a/f ratio. Except for that one guy that didn't know you could run on water? I can remember the first car I saw with water injection when I was fresh out of high school working in a body shop. We tended to do most of our work on custom cars and rods. The car was an olds 2 door, I forget the exact model but it had a very square body style, a large v-8 and a holley water injection system. I remember it because many older cars ran a vinyl style washer bag as the reservoir for the windshield squiters and this car had 2, except the one was for the water injection system. I remember this because the owner took me for a ride with and without the system and there was a very noticeable gain in power. But that was a NA engine with no computer and a massive 4 bbl carb. Your running a boosted engine with an ecu that your fooling into thinking all is fine based on temperature alone. Your able to reach these peak boost pressures based on a denser air charge alone with no regard for Mr. Stiochmeter. Also known as the air/fuel ratio. Choose your upgraded ecu but they are all designed to compensate for the higher torque levels by supplying more fuel based on the mechanical demand of the engine. Anyway you slice it or dice it you need more fuel or your running lean at higher boost levels based on the stock ecu. You'll get away with it for a while but sooner or later you gonna pay the fiddler. Good Luck.
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