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Molded Splash Guards / mud Flaps

3776 Views 12 Replies 7 Participants Last post by  Mujenpwr
Ford Parts / Accessory page offers these:
F-150 2021-2022 Carbon Black Molded Splash Guards Front Pair ~ ML3Z16A550AA (ford.com)

but says not for Lighting -curious what Lightning owners are using? Weathertech? Husky?
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So I have these and have installed them. They aren't for a lightning because the fenders on the Lightning are different. The ICE F150 has 'square' corners around the wheels, the Lightning has 2 45 degree angles. The rears also have a christmas-tree in a different spot.

Aero wise, they are at worst 'even', at best, a slight improvement based on me doing the same drives on CC at 70mph before and after (which got me a .1 mi/kwh improvement).
"In general, mud flaps are infamous for producing drag."

A Google search on the subject will produce a bounty of results, but even small stylish mud flaps have a pretty dramatic effect on a model 3. Door handles and mirrors produce measurable negative effects, mud flaps by contrast are cute little parachutes.
One thing to note, the model-3 has a much different wheel well, so I'm not sure you can compare them. The 'looser' wheel well of the F150 could potentially benefit significantly for a 'more surrounding' well, caused by mud flaps.

The one rule aerodynamics-experts ALWAYS point out is: You cannot make assumptions about aerodynamics. Modern drag simulators/modelers show that what was once 'assumed' as 'rules of thumb' are far from it, and differ from one model to another.
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