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Old 03-22-2009, 03:28 PM   #61
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To get higher horsepower? I do think a WIA is a pretty wacky way to get better economy, but I'm willing to give it a shot.

Replacing my air valve would be a lot harder. Ditto for the engine.
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Old 03-22-2009, 03:41 PM   #62
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That's a design compromise where they've chosen power over economy. You could also ask why they use automatic transmissions or ever-more-powerful larger engines when faced with fuel economy requirements. FE is not a higher priority than others, they do the minimum required to avoid CAFE fines or they accept the fines and build them into the price.

It's also for reliability/longevity/driveability in all conditions and for all drivers. A WAI could be problematic in abnormally hot climates and for people who drive hard -- as previously mentioned, detonation and timing and what not.

A WAI does not cause problems for most hypermilers in most climates.
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Old 03-22-2009, 03:55 PM   #63
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It's like talking to a brick wall.

FACT: A WAI does not increase fuel economy.
http://www.metrompg.com/posts/wai-test.htm
http://www.techno-fandom.org/~hobbit.../results-1.txt
http://www.cleanmpg.com/forums/showthread.php?t=11462
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Old 03-22-2009, 03:58 PM   #64
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For that one guy. He even discusses reasons it may not have worked in his tests.
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Old 03-22-2009, 04:02 PM   #65
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It's like talking to a brick wall.

FACT: That link is to one guy's experiments with one car.
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Old 03-22-2009, 04:06 PM   #66
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Quote:
Originally Posted by theholycow View Post
It's like talking to a brick wall.

FACT: That link is to one guy's experiments with one car.
More links added for you.
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Old 03-22-2009, 04:09 PM   #67
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In that third link states the guy had success when it was colder out. Call that a "maybe"?

What gets me is how cheap it is to give it a shot.
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Old 03-22-2009, 04:48 PM   #68
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So, NovaResource has provided 3 examples. They're not perfect but they are examples. One admits that it's not conclusive, and another has mixed results depending on weather. The remaining one was on a Prius; I would not expect Prius data to apply to other vehicles.

How about the other side? Who can provide 3 imperfect examples of WAI being effective? I know I've seen many people post that it worked for them, but looking at a few gaslogs, it's not as clear as I remember.

Here's a google search of our own gaslogs:
http://www.google.com/search?q=site:...log+wai+OR+hai

Here's the "top 100" lists from our gaslogs:
http://www.gassavers.org/garage/viewall/epa (Top 100 improvements over EPA estimates)
http://www.gassavers.org/garage/viewall/mpg (Top 100 actual MPG)
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Old 03-22-2009, 04:50 PM   #69
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Given that car design differences could certainly effect WAI impact, it makes real world data collection / comparison tough.
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Old 03-22-2009, 06:50 PM   #70
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novaresource Have you done ANY experiments to back up YOUR claim that HAI doesn't work or are you just parroting what others say without proper experimentation? There is a wealth if experience here and to come in ad tell them they are all wrong is not wise.

I will run a back to back loop to prove or disprove on my car whether a HAI works or not. I have a 65 mile loop and I'll run one with cold air and one with the HAI and I will top the tank before each run so weight is not a factor. I will not fudge the results I will even take photos of my scangague to show what is happening. this will be a definitive test.


http://www.gassavers.org/showthread.php?t=10415
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