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Old 04-25-2011, 02:56 PM   #21 (permalink)
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Join Date: Jan 2011
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Gen - '05 Jeep Liberty Sport
90 day: 22.09 mpg (US)

Blurry - '03 Ford Focus SE
90 day: 35.31 mpg (US)
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^^ most likely it can't account for temperature-pressure relationships, and therefore assumes a temperature that's programmed into the ECU

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Old 12-07-2011, 11:18 PM   #22 (permalink)
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Greenie - '98 Honda Civic DX
90 day: 45.72 mpg (US)
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Hey, I have a 98 civic too. I came on here to build one of these things from the diy section... I see you did it yourself, but do you have any pics or directions? I am currently documenting everything I do to my car, including how I did it. I think this will help others that come across this.
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Old 07-27-2012, 02:54 PM   #23 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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90 day: 62.62 mpg (US)
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I edited post #13, where I presented my results: WAI A-B-A test (design and execution)
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See my MODDING THREAD for ongoing projects. Black and Green's garage entry has more details. I plan to DIY rebuild this car over decades as parts die--replacing or modding small and major parts until it becomes a different car of roughly the same shape. My fuel economy goal is 60+ mpg while averaging posted speed limits.
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Old 12-04-2012, 10:48 PM   #24 (permalink)
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ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
90 day: 18.76 mpg (US)

the Avenger - '08 Dodge Avenger SXT
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Quote:
Originally Posted by California98Civic View Post
Tested my re-designed WAI this morning, and here are the results:

A = no WAI
B = WAI

A1 50.8 mpg
B1 51.8 mpg
A2 50.8 mpg
B2 52.1 mpg
__________
= +1.15 mpg on ave.

My route was an 18.5 mile freeway loop, around which I held the throttle at 16.1% consistently. No significant wind this morning. I warmed the car and tires over 25 miles to the course. Each nearly closed loop had me at speed and in throttle position when I reset the trip gauges on my Ultra Gauge.

I tracked other data too:

A1: 55.6 mph; .37 gal fuel; peak IAT 96.6F; g/h 1.10 (50.8 mpg)
B1: 54.6 mph; .36 gal fuel; peak IAT 116.4F; g/h 1.05 (51.8 mpg)
A2: 55.6 mph; .37 gal fuel; peak IAT 104.4F; g/h 1.10 (50.8 mpg)
B2: 54.9 mph; .35 gal fuel; peak IAT 120.0F; g/h 1.05 (52.1 mpg)

I am satisfied that it works, though clearly the impact is modest though significant.

WAI design: [EDIT: I redesigned the WAI to use dryer hose, which has the advantage of being easily repositioned if the intake air is too hot or too cold--and for different seasons.] My WAI extends from the stock 1998 Civic air filter box over the motor to reach the exhaust manifold at the front, behind the radiators. The WAI is made of black PVC type plumbing tubing. I chose it because it gets hot and therefore keeps the air warm while it travels to the intake. Around the intake opening, just above the manifold, I have a temporary "box" (made of aluminum foil and duct tape!). The box is open only at the top, up against the black hood, and has the purpose of reducing cooler air entrance into the intake when the car hits highway speeds. I run grille blocks too.

My car has a MAP sensor.

I'm going to keep my WAI. It seems to work. But sometime I'll want to test a CAI against it.
I got similar results from my testing last night: 20.5 mpg Dodge RAM ABA testing run I even got about the same mpg increase...1.13 more with the WAI. And, yes, my Dodge RAM is a MAP vehicle. Not sure I read this thread before now. Interesting.
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Old 12-05-2012, 12:57 AM   #25 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Quote:
Originally Posted by ECONORAM View Post
I got similar results from my testing last night: 20.5 mpg Dodge RAM ABA testing run I even got about the same mpg increase...1.13 more with the WAI. And, yes, my Dodge RAM is a MAP vehicle. Not sure I read this thread before now. Interesting.
Fortuitous coincidence or perhaps validity seen in repeatability?

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See my MODDING THREAD for ongoing projects. Black and Green's garage entry has more details. I plan to DIY rebuild this car over decades as parts die--replacing or modding small and major parts until it becomes a different car of roughly the same shape. My fuel economy goal is 60+ mpg while averaging posted speed limits.
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