First I would like to say I do not have the training or the experiance that Dr. Boost has. But wold like to make a couple of comments in regards to water injection.
The argument that water displaces the air is some what true. But if you run excessively rich to control detonation you have to use a much larger volume of fuel to get the same result. The latent heat of gasoline is about 350 kj/kg.K and that of water is 2256 kj/kg.K so water will remove more heat than gas. A leaner running engine will produce more power than one that is overly rich. My argument is that it will take much less water to provide the same in cylinder cooling as fuel.
Another fact about a properly designed water inejction system is that we want water droplets, while very small to get into the combustion chamber so that they can evapurate in the cylinder there by removing the excess heat created there. The droplets turn in to steam whos expansion rate also create horse power, small but none the less it does.
One not that I have noticed both as a SAAB dealers for 27 years and from following the performance boards, none of the engineers in Sweden seem to take into account the wide range of ambeint air tempurature in the US or the poor quality of fuel in many parts of our land. Where I live here in the midwest temperatures can very by as much as 30C in one day, on rare occations. In the summer we get temps of 37C, at that no air to air intercooler will give the perforamnce of a properly designed and installed water injection system.
Thanks for your time.
Brad

posted by 65.70.150...

• Just installed Optiflow air filter on my Viggen and..., Joel, Sun, 9 Mar 2003 02:20:12
  • Re: Just installed Optiflow air filter on my Viggen and..., Dr Boost, Sun, 9 Mar 2003 04:13:17
    • Now that you've mentioned the purge valve, Peter , Sun, 9 Mar 2003 11:40:39
      • Re: Now that you've mentioned the purge valve, Dr Boost, Mon, 10 Mar 2003 03:44:58
    • Re: Just installed Optiflow air filter on my Viggen and..., Joel, Sun, 9 Mar 2003 11:39:44
      • you installed the cold air box?, davenew, Sun, 9 Mar 2003 19:43:28
        • Re: you installed the cold air box?, Joel, Mon, 10 Mar 2003 10:38:40
    • HEY! Dr. Boost......., TERRY, Sun, 9 Mar 2003 04:25:49
      • Re: HEY! Dr. Boost......., Dr Boost, Mon, 10 Mar 2003 04:18:04
        • Thanks Dr. Boost! Great info as usual! n/m, TERRY, Mon, 10 Mar 2003 11:17:06
        • a couple of comments on water injection, Brad, Mon, 10 Mar 2003 10:26:31 <-- Viewing This Message
          • Brad, you are a gentleman and a scholar..., TERRY, Mon, 10 Mar 2003 11:15:24
      • TD04-HL15T is good for 300+.....(long), zeke, Sun, 9 Mar 2003 10:06:49
        • Re: TD04-HL15T is good for 300+.....(long), TERRY, Sun, 9 Mar 2003 13:58:08
          • Even a stock Aero, under the right conditions,, zeke, Sun, 9 Mar 2003 21:39:20
          • maybe because it's so cold up there, davenew, Sun, 9 Mar 2003 19:47:46
            • Re: maybe because it's so cold up there, TERRY, Sun, 9 Mar 2003 20:11:48
      • HejHej!!!-Dr.,please look at this og900 cam profile-, snabb-skit, Sun, 9 Mar 2003 09:32:39

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• Prev by Date: what extra hardware did you get for the install??, steve, Mon, 10 Mar 2003 10:15:33
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