cross-posted from: https://lemmy.ml/post/26201585
So, I don't know much about cars, but I generally expected for that part to be flush with the body. Is there any reason for there to be a grill like thing in front of the front door?
this post was submitted on 19 Feb 2025
12 points (77.3% liked)
Cars - For Car Enthusiasts
4138 readers
27 users here now
About Community
c/Cars is the largest automotive enthusiast community on Lemmy and the fediverse. We're your central hub for vehicle-related discussion, industry news, reviews, projects, DIY guides, advice, stories, and more.
Rules
- Stay respectful to the community, hold civil discussions, even when others hold opinions that may differ from yours.
- This is not an NSFW community, and any such content will not be tolerated.
- Policy, not politics! Policy discussions revolve around the concept; political discussions revolve around the individual, party, association, etc. We only allow POLICY discussions and political discussions should go to c/politics.
- Must be related to cars, anything that does not have connection to cars will be considered spam/irrelevant and is subject to removal.
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Is that an enthusiast thing? I initially thought it was a manufacturing defect.
It should be a pressure relief channel coming from the wheel arch: wheel rotation creates a complex air flow and I think this channel lets trapped air flow outwards (and stay attached to the vehicle sides, improving aerodynamics). Probably I got much wrong and more probably still, it’s of no real use for a road car driving under 200km/h.
Edit: could also be linked to brake cooling, now that I think of it…
I support your answer with my basic knowlede of car aerodynamics. Since this duct is so small, i highly doubt it has a significant or even measurable effect. Brake cooling would make sense though especially in a sporty electric vehicles that often suffer from brake overheating.
Isn't most of the braking going to be done by the regenerative braking system rather than the pads and rotors?
Brake cooling was my first thought. I've never heard of any ducting made just for releasing pressure caused by tire spin, but have cut many brake cooling ducts in my days
Its probably for brake cooling.
There's a high pressure wave that builds up in front of the wheels that wants to be released by putting a grill in front of them so less air gets pushed under the car, because if that pressure wave were directed under the car then it would reduce the amount of downforce being generated by the Bernoulli effect.
AFAIK, grills behind the wheels will actually reduce the downforce of a vehicle by allowing more air under the vehicle, increasing the pressure, but its a trade-off that can be made to regulate brake fade when trying to slow down from very high speeds.
Thanks for the answer. I am not really familiar with cars very much.