Kammback Attempt! - Fuel Economy, Hypermiling, EcoModding News and Forum

Nevyn · 04-26-2011, 08:17 PM

Soo....what do you folks think?

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

jtbo · 04-27-2011, 12:30 AM

Quote:

Originally Posted by Nevyn

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

euromodder · 04-27-2011, 04:36 AM

Quote:

Originally Posted by Nevyn

Soo....what do you folks think?

About what ?

Nevyn · 04-27-2011, 07:50 AM

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.

billyjones · 04-27-2011, 08:17 AM

I've been wondering if a kammback would help my Tercel sedan.

California98Civic · 04-27-2011, 11:09 AM

Quote:

Originally Posted by Nevyn

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.

Nevyn · 04-27-2011, 03:16 PM

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!

NeilBlanchard · 04-27-2011, 07:18 PM

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...

Nevyn · 04-28-2011, 03:29 PM

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....

Nevyn · 05-13-2011, 01:18 PM

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.