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| Aero mods I saw on a van?; What is this??? | |
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| Tweet Topic Started: Aug 7 2011, 05:51 PM (2,232 Views) | |
| Cobb | Aug 9 2011, 12:09 AM Post #16 |
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BANNED
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Its easy to make a vacuum forming machine. The hard part is gettingt he plastic to work with. Make or Car Craft had a how to on how to make one. Johnny Mullett had them and said they didnt work except for clearing the rear winder. I think the need to placed in teh exact spot that the air or boundary layer starts to seperate from the vehicle. |
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| Bad Bent | Aug 18 2011, 07:31 PM Post #17 |
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Facetious Educated Donkey
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So, let me update this with a few pictures. Here is the arrangement of the tabs. In moving them I kept the original angles, pretty much. ![]() Pretty close to a side view... ![]() A thumbnail of them, at an angle. ![]() I did do the tuft testing, Wanna Beco, which is why I moved them forward, closer to where the roof breaks and begins sloping toward the hatch. I have not taken the time to repeat the test. My mpg has been stable at 55 mpg for the summer. I believe lowering the back of the car may have gotten me 1 mpg but I only filled one tank. |
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| dayle1960 | Aug 18 2011, 07:44 PM Post #18 |
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Fastest Hampster EVER
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Thanks for the pics BB. Wonder if you could make them yourself? Looks like the profile of a shark's dorsel fin. Hmmmm. How wide would you say they are? Do you think the width makes a difference or is the angle of attack the thing that creates the swirl effect. Hmmmm, shark fin. I might experiment. Hmmmm |
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| Bad Bent | Aug 18 2011, 09:55 PM Post #19 |
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Facetious Educated Donkey
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Here is a good thread at http://www.gassavers.org/showthread.php?t=1482 Including picks like these: ![]() ![]() ![]()
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| Johnny Mullet | Aug 18 2011, 10:03 PM Post #20 |
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Fear the Mullet
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I had them on my 98 but did not notice any increase in fuel economy. My rear window stayed cleaner though! |
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3:34 AM Jul 11