Quote:
Originally Posted by Talos Woten
Let us know how much mpg you get from the skirts! It's helpful to compare between cars.
All I can say is that my respect for automotive engineers has gone up considerably since I started modding my car. I remember reading a paper about how a wheel spat 40mm high and placed precisely there improved mpg. I went to install them on my car... and discovered it already had them. 
Anyhoo, I wouldn't put it past some clever engineer to design a virtual diffuser using the heat from your muffler or somesuch.  |
i think thats what hyundai was going for when they put the muffler underneath horizontally. its curve at a slight angle too. its like a messy rear diffuser. i mean obviously a smoother underbody panel would be cleaner and allow better airflow, but i think they did the best they could with a muffler
i need to smooth it totally out so i can add a proper and extended rear diffuser, like the mercedes eqxx has!
and from my coast down quick testing with rear wheel skirts, i saw a 1mph improvement from baseline, and from everyone elses tests of their rear wheel skirts, and even light year one/zeros tests, it seems like it only nets about a 1 mpg gain, give or take. better than nothing, but only about half the drag reduction as say, removing side mirrors