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Old 07-11-2009, 01:45 AM   #1 (permalink)
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Kammback yields +4 mpg


I got 55 mpg highway with it versus 51 mpg without.
Full details and photos on my blog, note the awesome new EM decals!
Scientific Method meets Fuel Economy: Kammback

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Old 07-11-2009, 01:58 AM   #2 (permalink)
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Not bad... not bad at all.
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Old 07-11-2009, 02:25 AM   #3 (permalink)
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Nice looking bubble! I like your simple but effective fabrication.

You have an escort/pacer hybrid started.

I've been dying to do this for the egg but I'm too busy at the moment and can't justify it because I do so little highway driving.

Just play "Stand by Your Man" by Patsy Klein.

Living vicariously...
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Old 07-11-2009, 02:54 AM   #4 (permalink)
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two up
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Old 07-11-2009, 03:02 AM   #5 (permalink)
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Wow, that looks good, Gascort
Have you coastdown tested it yet? I wonder what the effect on Cd is?

The bubble sticks out so far behind the bumper that I'd advise you to put some red reflective tape on the back. Not everyone pays attention, unfortunately.
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Piwoslaw's Peugeot 307sw modding thread

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Old 07-11-2009, 03:48 AM   #6 (permalink)
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gascort -

Fantastic job! How thick is the plexiglass? It seems "thin enough" to bend really well. Is it bending from the bolts or did you have to heat it?

CarloSW2
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Old 07-11-2009, 08:42 AM   #7 (permalink)
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Cool!

Excellent fabrication gascort. Smart solution to reducing the turbulent wake of your car without losing rearward visibility or the functionality of the hatch.

Bondo
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Old 07-11-2009, 09:42 AM   #8 (permalink)
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VERY nice! I love it.
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Old 07-11-2009, 11:23 AM   #9 (permalink)
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That looks awesome!

The way it's mounted reminds me of bicycle racks that strap onto the trunk - so maybe this could double as a bicycle rack. I would guess the 1/2" conduits probably aren't strong enough to support too much weight though.
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Old 07-11-2009, 11:42 AM   #10 (permalink)
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Quote:
Originally Posted by Piwoslaw View Post
Wow, that looks good, Gascort
Have you coastdown tested it yet? I wonder what the effect on Cd is?
The bubble sticks out so far behind the bumper that I'd advise you to put some red reflective tape on the back. Not everyone pays attention, unfortunately.
Thanks!!
In part of my test route there is a huge hill. It's on my commute and my goal is to be able to EOC the whole way down without losing speed.
When I tested it yesterday, I coasted (on average) more than twice as far before dropping 5 mph than without. On one trial I tripled the length!
...
I do have reflectors/red LEDs planned. Good point!

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