Project: making a permanent Metro Kammback extension - Page 4 - Fuel Economy, Hypermiling, EcoModding News and Forum

garys_1k · 07-06-2008, 10:43 PM

Nice! Can't wait to see the vids, your work is inspiring. My Focus is pretty much as far along in the front as I can (want to) take it, I'm sure the back needs cleaning up and that's likely where it could do the most good.

MetroMPG · 07-07-2008, 12:06 AM

Here it is:

YouTube - Tuft testing a "Kamm back" mockup

Cd · 07-07-2008, 12:46 AM

Very profesionally done !

Thanks for posting !

MetroMPG · 07-07-2008, 12:47 AM

Quote:

Originally Posted by .Cd

One of the guys here ( millenniumtree ) suggested using audio tape insted of yarn .

I've used audio tape before as "telltales" on a sail. Works really well, but the downside is it seems to have a serious static cling problem in certain conditions.

Also, not so good on a sail if you're used to red & green telltales on either side.

cfg83 · 07-07-2008, 12:54 AM

MetroMPG -

Great stuff. The camera mounted on the car is the best POV for tuft testing.

CarloSW2

Cd · 07-07-2008, 12:56 AM

So is the Kamm back going to have a hollow cavity or a plexiglass rear window ( the red portion of the image )

If you remember, the UCDavis project car had a small cavity ...but then their .Cd count wasn't exactly impressive for the amount of work that they put into that car.

Cd · 07-07-2008, 12:57 AM

Hey - I love the look of the car by the way.
Man what a difference !

I have a new question : I noticed that in the still pictures ( the one that I posted in my previous post ) the area on the side of the Kamm back isn't filled in. ( The triangular area just above the area that I filled in with red )
Surely you filled in this side piece before the test ... right ?

Peakster · 07-07-2008, 02:54 AM

This is such a great video! Real professional and it worked extremely well. Are you thinking of pushing the envelope further and making an attachable boat-tail in the future? I'm totally staying tuned

.

ebacherville · 07-07-2008, 03:00 AM

thats awsome what did you use to mount your camera for the testo do the same form my setup for tuff testing.. how did you mount that camera!!!!!!!

groar · 07-07-2008, 04:43 AM

Quote:

Originally Posted by MetroMPG

Here it is:

Great job :-)

This gives me more and more desire to ecomod my car...
but I will only begin with front grill block and may try rear wheel skirts : your DIY article seams so easy to follow...

Have you ever tuff tested your rear wheel skirts or your front grill block ?

Denis.