Turbo performance
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Joined: Nov 2003
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From: New England
Car Info: Red 04 WRX Wagon
Turbo performance
Do any of you motorheads out there know if the turbo on the X performs less efficiently in rain or fog. I was driving my car on a real foggy moist night and it seemed I received less power from my turbo that night. Is it just me?
Second question: Is the turbo on the X considered a low RPM turbo or high RPM turbo?
Thanks
Second question: Is the turbo on the X considered a low RPM turbo or high RPM turbo?
Thanks
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From: Reno, NV
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If by "X" yo mean WRX, then I would consider it a midrange turbo. It definitely falls off some at high rpm. If you mean "Forester XT" then it's a low-end torque turbo. (Same turbo, bigger motor.) You shouldn't have lost much power due to the fog, unless there was REALLY a lot of water in the air displacing oxygen.
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Fog means moisture in the air, and moist air is dense air. Dense air travels with more difficulty through your engine and thus the slight drop in preformance. Same deal with hot days: air is denser, plus the heat makes everything in the engine work harder. Hence, hot and humid days = laggy performance, cold and dry days = optimal performance.
Simple ain't it?
Simple ain't it?
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Choku Dori...You sooo crazy...Quit trying to mislead the poor guy. :P
Cold air is more dense. Humid air is less dense. That's why steam rises and clouds are above us. From what I hear, you'll see a tiny bit more boost on cold days than on hot, humid days. Engines love cold, dense air, as it has more potential to expand and whatnot. If I were an engine, though, I don't think I'd like hot, humid weather at all.
Cold air is more dense. Humid air is less dense. That's why steam rises and clouds are above us. From what I hear, you'll see a tiny bit more boost on cold days than on hot, humid days. Engines love cold, dense air, as it has more potential to expand and whatnot. If I were an engine, though, I don't think I'd like hot, humid weather at all.
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From: Lastweek Lane - Watertown, NY
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No, but water cools. Water doesn't affect the o2 (except by displacing it. Foggy or humid weather isn't going to be 'wet' enough to displace that much oxygen, though).
Read what Corky Bell has to say on the subject.
Read what Corky Bell has to say on the subject.
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I'm sure it doesn't make much difference and my car drives like a raped ape in the winter and cool weather, but theoretically H2O in the combustion chamber without tuning to turn up boost and advance timing. You are right that the amount i fog probably doesn't affect fuel burn at all. P.S. who would talk a guy named Corky's word, sounds like he wears a helmet and drives the yellow short Subaru.
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Water and water vapor are two different things. Water vapor compresses like any other gas, it just doesn't detonate, of course.
In the end, it's just a matter of energy. A certain volume of hot, humid air contains less potential energy than cold, dry air.
In the end, it's just a matter of energy. A certain volume of hot, humid air contains less potential energy than cold, dry air.
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