Just an idea...
 

While my car is gonna be apart for bodywork, I considered buying some lawn edging and adding an air dam, and then I had a brain fart...

Why not try and make front and rear wheel air curtains?

Give it a try, worse thing that could happen is it does not work as imagined and you have to remove it or block it off.

From what I've read these things are extensively tested and not shot at from the hip.

Shoot from the hip, what the heck.

The rear elements look similar to what is seen on semi-tractor trailers, perhaps they could be longer and at a gentler angle?

The front chamber looks like one of those bernoulli/venturi diagrams that explain pressure and velocity.

https://anjungsainssmkss.wordpress.c...in-air-flight/
https://anjungsainssmkss.files.wordp.../bernoulli.jpg

Aren't most air-curtains big mouth, small exit?

There is an energy consumption factor or "work done" when squeezing and unsqueezing air. Energy/drag considerations.

Maybe do what you can to merely redirect air and not work it too much either way?

I did alternately think about skipping the tire spat and just angling the side skirt from inside of front tire to outside of rear tire... I also meant to draw a little bigger gap in the front design, but I doodled it in like 45sec

What are the relative heights of the component parts?

Air curtains are for steerable wheels. Do you have rear-wheel steering? Else skirts.

The rear wheel 'curtain' as drawn is occluded by the side curtain anyway.

The one problem I see is, every air curtain I've looked at on a production car (and I've looked at most, if not all of them) sits in the middle-to-top area of the wheel housing, not the bottom. It might be easier to add these Ioniq air curtain ducts to your bumper cover while you have it off. At $6 per, it's a cheap, OEM-engineered solution that's pretty much guaranteed to work; all you have to figure out is how to get intake air to them.

The 2018 Honda Clarity uses rear wheel air curtains.

http://ecomodder.com/forum/member-vm...219-163059.jpg

As they demonstrated with the original Insight, the public won't buy skirted cars.

Let's try that link again.

https://www.hyundaipartsdeal.com/par...nt-bumper.html

Other images.

Nosing ahead: Hyundai Ioniq Electric reviewed
18 October 2016
by Lem Bingley
Nosing ahead: Hyundai Ioniq Electric reviewed
https://3.bp.blogspot.com/-865ZFghmV...iq-ev-side.jpg

https://1.bp.blogspot.com/-3L0mZca7H...ir-curtain.jpg

https://2.bp.blogspot.com/-p5i_CBAPI...ront-above.jpg

Both links work on my computer.... One is for the RH duct, the other for the LH.

Strange, both are working on my computer now as well.

The Ioniq example follows the larger opening, smaller exit rule, and looks to be a little higher than the center-line of the wheel as well.

The rear wheel spats in the original picture look like they would increase the size of your wake by shooting air out the sides instead of directing it around.

This idea sounds familiar. LoL.

http://ecomodder.com/forum/showthrea...hts-29302.html