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Old 03-05-2020, 11:32 AM   #39 (permalink)
Flakbadger
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Join Date: Apr 2012
Location: Oregon
Posts: 566

White Lightning - '17 Nissan Leaf SV
Team Leaf
90 day: 159.47 mpg (US)
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Quote:
Originally Posted by MetroMPG View Post
Any plans to do rear aero? Box cavity?
I would consider a box cavity as a stretch goal. Definitely something to consider but not my top priority just yet. I feel like the largest improvements could be made at the rear of the car for sure, but there is a lot of low-hanging fruit around the front and sides, and those things will be my priority.

First after side skirts, I want to make rear wheel boattails, sort of a larger version of the rear bumper on the Toyota Prius. I would also like to create a more wedge-shaped splitter ahead of the current reversed mud flap to better transition the air around the leading edge of the rear tire.

Next up, lots of people block the Leaf's front grille, and while I understand the logic there (and previously blocked the grille on my Yaris), I personally won't sacrifice any cooling given that the intake does cool the battery and is the only battery cooling system there is. However, I did notice that part of the grille is "fake" anyway, so I will be making plastic inserts to flatten the front grille in those areas with the rest of the bumper for smoother air transition.

I also will be making aggressive and deep front splitters ahead of the front tires, and boattails behind them as well. I had originally considered full-length skirts between front and rear wheels using gutter material, but found that the angles don't make sense on this vehicle. The gaps are too large between where the front tire ends and the skirt can begin, and my reversed mudflaps make a great mount for rear wheel covers, but confound the angle of attachment for side skirts. I will still revisit the concept, but only after I complete the rear wheel skirt work.

Another high priority; I want to take a look at the rear spoiler mount, and see if I can trim 'n shim it to drop the angle some, to better match the curvature of the aero template. As it stands now, the spoiler leaves something to be desired from its angle. I feel like only a few degrees here would have a dramatic effect with respect to attached airflow. Stylistically I suppose it looks cool or whatever, but it's an aero shortfall.

Also, since removal of the antenna mount is not an option (I'd have to cut wires ) I'll be installing an aerodynamicized cover and removing the antenna since I don't care about AM/FM/XM. EDIT: This cover, specifically

EDIT 2: I also want to take a look at making plastic inserts for the front wheel well, to make it more similar to the Honda Insight. Smoothed transitions on the 'trailing' edge of the well, extensions on the 'leading' edge to help mask the tire from airflow.

EDIT 3: I'd also like to Basjoos the panels, especially in the front of the vehicle. I can almost put my finger inside the gap around the charging door, which is ridiculous.
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Last edited by Flakbadger; 03-05-2020 at 11:54 AM..
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