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Old 06-28-2019, 07:32 AM   #111 (permalink)
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Any thoughts of this aero add on?


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Old 06-28-2019, 09:09 AM   #112 (permalink)
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Are you talking about tail extension?

If so, yes there should be some benefit to it. There's a thread on here where someone tried it out on a 7th gen Civic coupe and noticed a decent improvement. I tried a more basic version on my 04 Civic sedan and noticed some improvement as well, although I could never really get a sturdy version that would last very long.
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Old 06-28-2019, 09:13 AM   #113 (permalink)
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I like it too. Don't know how much it'll do for the vortices coming off the C pillars, but I would bet most guys would say it would help nonetheless. It's a little like one of those Bonneville spoilers.
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Old 06-28-2019, 05:54 PM   #114 (permalink)
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Quote:
Originally Posted by deluxx View Post
Any thoughts of this aero add on?

I like it! I had originally wanted something similar for my Saturn but hadnít made it yet
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Old 06-28-2019, 07:27 PM   #115 (permalink)
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Am I using the template tool correctly?

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Old 06-28-2019, 07:55 PM   #116 (permalink)
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It appears so.

Consider making a Bonneville spoiler that sits 3-4 inches above the trunk lid. You could hinge it with 4-bars to open with the trunk lid itself. 4-bars are magic.
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Old 06-28-2019, 08:14 PM   #117 (permalink)
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Something like this?


This looks like a easy way to make a diffuser, but I'm not sure if its aero..
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Old 06-28-2019, 08:21 PM   #118 (permalink)
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https://www.homedepot.com/p/8-ft-Cor...3513/202092961
https://www.homedepot.com/p/Metal-Sa...3041/204289006
Possible Bellypan/skid plate material for about $1sf each
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Old 06-28-2019, 10:32 PM   #119 (permalink)
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A kammback that follows the template will have limited benefit, if any, on a sedan. Kammbacks work better on boxy hatchbacks where their rear aero is worse. Even a fill boattail on a sedan may not have magical gains in relation to the work invested in designing one. A tail extension is simpler and does improve economy by giving the detached air down the rear of the car something to attach to. Try tuft testing the rear of your car to see where airflow is attached and where it isn't to give you an idea of what you have to work with.

Quote:
Originally Posted by 19bonestock88 View Post
I like it! I had originally wanted something similar for my Saturn but hadnít made it yet
You're still running your tail extension though, right?
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Old 06-28-2019, 11:09 PM   #120 (permalink)
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Quote:
Something like this?
Someone posted a Rally car with a raised rear spoiler recently, but I can't find it now. It had fiberglass pieces that came off the C-pillar about 4 inches higher that flowed into a Bonneville type spoiler with a Gurney flap at the tip (IIRC).

Here's an example of a successful 4-bar linkage that attaches above the window. No reason why it couldn't be the C-pillar.


https://ecomodder.com/forum/showthre...tml#post397858

The struts, the decklid, the back window and the boat tail[?] constitute the four bars.

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