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Old 06-01-2008, 07:13 PM   #1
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air dam and vortec generators

Hi all, I just finished my air dam and installing the VG's . I am going to start testing on my new tank of gas. My present mileage has gone up to 826km to 31.5 L. that tank I was perfecting the mild pulse and glide and about 4% gain. The VG's are along the top off the roof and along the bottom of the car's diffuser. So far I have seen some improvement in mileage.Still testing....
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Old 06-02-2008, 01:01 AM   #2
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Piccies?

What kinda vehicle do you have?
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Old 06-02-2008, 07:57 AM   #3
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Piccies?
+1.......and what type of vortex generators did you use?
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Old 06-02-2008, 10:37 AM   #4
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I built the double VGs here http://www.gassavers.org/showthread.php?t=1482. They look like sharks teeth. My kids point and laugh as well as other people but I point and laugh at then at the pump. From the grill block, double VGs, and P&G I'm reaping aprox 25% increase in mileage. From 31MPG to 39.8MPG in mixed highway and city driving. I say it's worth the laughs.
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Old 06-02-2008, 11:04 AM   #5
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laughs are okay; I just hate it when an explanation is ask for by someone without the willingness nor mental skills to understand it.
While I do ( or at least think I do) understand the concept, I'm not sure that particular design of generator would help my Cavalier; maybe different on wagons, hatchbacks and trucks.
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Old 06-02-2008, 11:49 AM   #6
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While I do ( or at least think I do) understand the concept, I'm not sure that particular design of generator would help my Cavalier; maybe different on wagons, hatchbacks and trucks.
To the contrary, I always thought that VGs could most easily benefit the typical 'threebox' sedans over any other body style.
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Old 06-02-2008, 12:02 PM   #7
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While I do ( or at least think I do) understand the concept, I'm not sure that particular design of generator would help my Cavalier; maybe different on wagons, hatchbacks and trucks.
Why don't you think they'll work on your car?
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Old 06-02-2008, 06:47 PM   #8
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The way they are shaped makes me think they would act like little parachutes. Also I just would expect something with a pointed end with the air flowing around and along the surface of it rather than into it like a funnel.

Aside from the design; where would I put them on my Cavalier for best results?
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Old 06-02-2008, 07:06 PM   #9
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The way they are shaped makes me think they would act like little parachutes.
Sure, VGs will create some drag. But, in theory, they'll also help alleviate a larger area of drag/low pressure behind the car by simulating laminar flow.

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Aside from the design; where would I put them on my Cavalier for best results?
Actually, I was checking out your ride in the garage earlier.
You'd place in the same area as the Lancer EVO...on the back of the roof, a few inches from the upper line of the rear window glass. Like this:
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Old 06-02-2008, 07:58 PM   #10
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Those in the lancer pic look more like I would expect and don't seem to have the funnel effect.
I may read a little more on this and make my own. Can't hurt to try. Be easy to test with a small fan and a little smoke to see how they affect the airflow.
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