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Old 04-26-2011, 08:17 PM   #1 (permalink)
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The Crimson Crawler - '04 Elantra GLS
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Kammback Attempt!
Soo....what do you folks think?

*EDIT* I've added the link to the pic AGAIN; it seems to keep disappearing.



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Last edited by Nevyn; 04-27-2011 at 07:35 AM..
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Old 04-27-2011, 12:30 AM   #2 (permalink)
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ZX - '97 ZX Monaco
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Quote:
Originally Posted by Nevyn View Post
Soo....what do you folks think?
Windnoise, wipers add to that so might get less wind noise when they are covered and every bit of less noise is good

edit: Hmm, looks like that I have managed to reply into wrong place, this should of been in wiper cowl thread
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Old 04-27-2011, 04:36 AM   #3 (permalink)
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Hägar - '05 V50 1.6L Diesel
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Quote:
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Soo....what do you folks think?
About what ?
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Old 04-27-2011, 07:50 AM   #4 (permalink)
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The Crimson Crawler - '04 Elantra GLS
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Apologies about the photo missing and any confusion it caused. I learned 2 things on my drive this morning:

1). Painter's tape is SURPRISINGLY resilient even after a major thunderstorm, but there's gotta be better (this was a temporary test anyway)

2). My HORRIBLE back window vortices (from a tuft test that I did and never posted) seem to be completely gone; but I can't prove if it's an improvement or just a change.
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Old 04-27-2011, 08:17 AM   #5 (permalink)
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I've been wondering if a kammback would help my Tercel sedan.
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Old 04-27-2011, 11:09 AM   #6 (permalink)
60+ mpg at posted speeds
 
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Black and Green - '98 Civic DX Coupe
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Quote:
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but I can't prove if it's an improvement or just a change.
Do some coast-down testing or ABA testing. I would appreciate seeing your results. My 98 Civic coupe might benefit from a kamback too.
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Black and Green will be rebuilt over decades as parts die--until it becomes a different car. Goal is only 60-70 mpg at posted speeds. I'm not trying for highest possible mileage.

Calculators: standard deviation, Ohms Law, & drag HP losses.
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Old 04-27-2011, 03:16 PM   #7 (permalink)
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I don't know when I'll get to, but I'd certainly like to try. My car seems a lot quieter now with it on, for sure!

P.S. It's made from a coroplast beer sign. Check out beer/soda distributors for coroplast - they often have leftover signs that are quite large! I got 2 sheets that were 2x4 feet for free!
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Old 04-27-2011, 07:18 PM   #8 (permalink)
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Mica Blue - '05 xA RS 2.0
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Translucent 3M duct tape works very well, and if you have it on for weeks (rather than months) it cleans reasonably well.

Do a couple of tankfuls, and then take it off? Fewer vortices is a good thing...
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Old 04-28-2011, 03:29 PM   #9 (permalink)
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MAD crazy storms flipped it backwards on the car roof. I just took it off for the rain. I'll be making one a little better shaped anyway, now that I have a 92% accurate template....
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Old 05-13-2011, 01:18 PM   #10 (permalink)
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The Crimson Crawler - '04 Elantra GLS
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Kammback is re-installed. It got put on partway through a tank, which when I filled this morning worked out to 40.8 MPG. I'll keep a watch on it.


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