Aerodynamic Discussion Thread
#482
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Since there is still a discussion on hood vents. Here are some pics I took at 12 Hours of Sebring that I thought were interesting.
Audi R8
![](https://www.miataturbo.net/attachments/aerodynamics-119/109498-aerodynamic-discussion-thread-dscn1515_zps7ef24f37.jpg?dateline=1397341654)
Audi R8 Hood Vent
![](https://www.miataturbo.net/attachments/aerodynamics-119/109499-aerodynamic-discussion-thread-dscn1514_zpscc76bce1.jpg?dateline=1397341654)
Audi R8 Rear Diffuser
![](https://www.miataturbo.net/attachments/aerodynamics-119/109500-aerodynamic-discussion-thread-dscn1511_zps841d4abf.jpg?dateline=1397341654)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109501-aerodynamic-discussion-thread-dscn1512_zps5155271b.jpg?dateline=1397341654)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109502-aerodynamic-discussion-thread-dscn1513_zps19a7d071.jpg?dateline=1397341654)
BMW Z4 Hood Vents
![](https://www.miataturbo.net/attachments/aerodynamics-119/109503-aerodynamic-discussion-thread-dscn0826_zps771a2495.jpg?dateline=1397341654)
Aston Martin
![](https://www.miataturbo.net/attachments/aerodynamics-119/109504-aerodynamic-discussion-thread-dscn0794_zpse6fec354.jpg?dateline=1397341654)
Audi R8 Flying Lizard Motorsports
![](https://www.miataturbo.net/attachments/aerodynamics-119/109505-aerodynamic-discussion-thread-dscn0790_zps021fd19f.jpg?dateline=1397341654)
Dodge Viper Display Model
![](https://www.miataturbo.net/attachments/aerodynamics-119/109506-aerodynamic-discussion-thread-dscn0726_zpsf24344d3.jpg?dateline=1397341654)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109507-aerodynamic-discussion-thread-dscn0725_zps17e20f28.jpg?dateline=1397341654)
These weren't cars at 12 Hours of Sebring, but it some more pics I thought would be good for future reference
Carrera GT
![](https://www.miataturbo.net/attachments/aerodynamics-119/109508-aerodynamic-discussion-thread-dscn0613_zpsf37e1dac.jpg?dateline=1397342402)
Rear Diffuser
![](https://www.miataturbo.net/attachments/aerodynamics-119/109509-aerodynamic-discussion-thread-dscn0614_zps12119805.jpg?dateline=1397343114)
Rear Diffuser Right
![](https://www.miataturbo.net/attachments/aerodynamics-119/109510-aerodynamic-discussion-thread-dscn0615_zps2b4e8ad8.jpg?dateline=1397343114)
Rear Diffuser Left
![](https://www.miataturbo.net/attachments/aerodynamics-119/109511-aerodynamic-discussion-thread-dscn0616_zps9ef5da1a.jpg?dateline=1397343114)
Rear Diffuser Left Side Looking Back
![](https://www.miataturbo.net/attachments/aerodynamics-119/109512-aerodynamic-discussion-thread-dscn0617_zps016997f0.jpg?dateline=1397343114)
Front
![](https://www.miataturbo.net/attachments/aerodynamics-119/109513-aerodynamic-discussion-thread-dscn0607_zpse35062ac.jpg?dateline=1397343114)
Front Brake Duct
![](https://www.miataturbo.net/attachments/aerodynamics-119/109514-aerodynamic-discussion-thread-dscn0608_zps6934b020.jpg?dateline=1397343114)
Radiator in Front
![](https://www.miataturbo.net/attachments/aerodynamics-119/109515-aerodynamic-discussion-thread-dscn0610_zps50e283aa.jpg?dateline=1397343114)
McLaren P1
Rear Diffuser
![](https://www.miataturbo.net/attachments/aerodynamics-119/109516-aerodynamic-discussion-thread-dscn1979_zpsa63a0513.jpg?dateline=1397343114)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109517-aerodynamic-discussion-thread-dscn1978_zpsdfaf57b2.jpg?dateline=1397343114)
Rear Cooling Fan
![](https://www.miataturbo.net/attachments/aerodynamics-119/109518-aerodynamic-discussion-thread-dscn1976_zps50626323.jpg?dateline=1397343114)
Front Headlight Duct
![](http://i526.photobucket.com/albums/cc345/1993ka24detgt/DSCN1967_zps054c3169.jpg)
Front Headlight duct Exit
![Name: DSCN1968_zpse245069b.jpg
Views: 853
Size: 93.0 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184914d1501209520-aerodynamic-discussion-thread-dscn1968_zpse245069b.jpg)
![Name: DSCN1969_zpsa949f142.jpg
Views: 867
Size: 91.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184915d1501209520-aerodynamic-discussion-thread-dscn1969_zpsa949f142.jpg)
Hood Vents
![Name: DSCN1929_zpsac71aaef.jpg
Views: 935
Size: 72.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184916d1501209520-aerodynamic-discussion-thread-dscn1929_zpsac71aaef.jpg)
![Name: DSCN1957_zps9ebcd873.jpg
Views: 894
Size: 93.6 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184917d1501209520-aerodynamic-discussion-thread-dscn1957_zps9ebcd873.jpg)
Side Door Ducts
![Name: DSCN1944_zps8a628fac.jpg
Views: 918
Size: 100.1 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184918d1501209520-aerodynamic-discussion-thread-dscn1944_zps8a628fac.jpg)
![Name: DSCN1941_zpsabe3ed42.jpg
Views: 854
Size: 93.7 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184919d1501209520-aerodynamic-discussion-thread-dscn1941_zpsabe3ed42.jpg)
Side Door Ducts Open Door
![Name: DSCN1924_zps80610d36.jpg
Views: 862
Size: 97.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184920d1501209520-aerodynamic-discussion-thread-dscn1924_zps80610d36.jpg)
Bottom Side Door Ducts
![Name: DSCN1927_zpsc760f92f.jpg
Views: 1007
Size: 105.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184921d1501209520-aerodynamic-discussion-thread-dscn1927_zpsc760f92f.jpg)
Top Side Door Duct (Radiator/Intercooler)
![Name: DSCN1928_zps22255658.jpg
Views: 858
Size: 145.0 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184922d1501209520-aerodynamic-discussion-thread-dscn1928_zps22255658.jpg)
Clutch Cooler Duct
![Name: DSCN1937_zps37d68c06.jpg
Views: 905
Size: 93.8 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184923d1501209520-aerodynamic-discussion-thread-dscn1937_zps37d68c06.jpg)
I have a lot more pics, if you want to see more I might have them.
Audi R8
![](https://www.miataturbo.net/attachments/aerodynamics-119/109498-aerodynamic-discussion-thread-dscn1515_zps7ef24f37.jpg?dateline=1397341654)
Audi R8 Hood Vent
![](https://www.miataturbo.net/attachments/aerodynamics-119/109499-aerodynamic-discussion-thread-dscn1514_zpscc76bce1.jpg?dateline=1397341654)
Audi R8 Rear Diffuser
![](https://www.miataturbo.net/attachments/aerodynamics-119/109500-aerodynamic-discussion-thread-dscn1511_zps841d4abf.jpg?dateline=1397341654)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109501-aerodynamic-discussion-thread-dscn1512_zps5155271b.jpg?dateline=1397341654)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109502-aerodynamic-discussion-thread-dscn1513_zps19a7d071.jpg?dateline=1397341654)
BMW Z4 Hood Vents
![](https://www.miataturbo.net/attachments/aerodynamics-119/109503-aerodynamic-discussion-thread-dscn0826_zps771a2495.jpg?dateline=1397341654)
Aston Martin
![](https://www.miataturbo.net/attachments/aerodynamics-119/109504-aerodynamic-discussion-thread-dscn0794_zpse6fec354.jpg?dateline=1397341654)
Audi R8 Flying Lizard Motorsports
![](https://www.miataturbo.net/attachments/aerodynamics-119/109505-aerodynamic-discussion-thread-dscn0790_zps021fd19f.jpg?dateline=1397341654)
Dodge Viper Display Model
![](https://www.miataturbo.net/attachments/aerodynamics-119/109506-aerodynamic-discussion-thread-dscn0726_zpsf24344d3.jpg?dateline=1397341654)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109507-aerodynamic-discussion-thread-dscn0725_zps17e20f28.jpg?dateline=1397341654)
These weren't cars at 12 Hours of Sebring, but it some more pics I thought would be good for future reference
Carrera GT
![](https://www.miataturbo.net/attachments/aerodynamics-119/109508-aerodynamic-discussion-thread-dscn0613_zpsf37e1dac.jpg?dateline=1397342402)
Rear Diffuser
![](https://www.miataturbo.net/attachments/aerodynamics-119/109509-aerodynamic-discussion-thread-dscn0614_zps12119805.jpg?dateline=1397343114)
Rear Diffuser Right
![](https://www.miataturbo.net/attachments/aerodynamics-119/109510-aerodynamic-discussion-thread-dscn0615_zps2b4e8ad8.jpg?dateline=1397343114)
Rear Diffuser Left
![](https://www.miataturbo.net/attachments/aerodynamics-119/109511-aerodynamic-discussion-thread-dscn0616_zps9ef5da1a.jpg?dateline=1397343114)
Rear Diffuser Left Side Looking Back
![](https://www.miataturbo.net/attachments/aerodynamics-119/109512-aerodynamic-discussion-thread-dscn0617_zps016997f0.jpg?dateline=1397343114)
Front
![](https://www.miataturbo.net/attachments/aerodynamics-119/109513-aerodynamic-discussion-thread-dscn0607_zpse35062ac.jpg?dateline=1397343114)
Front Brake Duct
![](https://www.miataturbo.net/attachments/aerodynamics-119/109514-aerodynamic-discussion-thread-dscn0608_zps6934b020.jpg?dateline=1397343114)
Radiator in Front
![](https://www.miataturbo.net/attachments/aerodynamics-119/109515-aerodynamic-discussion-thread-dscn0610_zps50e283aa.jpg?dateline=1397343114)
McLaren P1
Rear Diffuser
![](https://www.miataturbo.net/attachments/aerodynamics-119/109516-aerodynamic-discussion-thread-dscn1979_zpsa63a0513.jpg?dateline=1397343114)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109517-aerodynamic-discussion-thread-dscn1978_zpsdfaf57b2.jpg?dateline=1397343114)
Rear Cooling Fan
![](https://www.miataturbo.net/attachments/aerodynamics-119/109518-aerodynamic-discussion-thread-dscn1976_zps50626323.jpg?dateline=1397343114)
Front Headlight Duct
![](http://i526.photobucket.com/albums/cc345/1993ka24detgt/DSCN1967_zps054c3169.jpg)
Front Headlight duct Exit
![Name: DSCN1968_zpse245069b.jpg
Views: 853
Size: 93.0 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184914d1501209520-aerodynamic-discussion-thread-dscn1968_zpse245069b.jpg)
![Name: DSCN1969_zpsa949f142.jpg
Views: 867
Size: 91.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184915d1501209520-aerodynamic-discussion-thread-dscn1969_zpsa949f142.jpg)
Hood Vents
![Name: DSCN1929_zpsac71aaef.jpg
Views: 935
Size: 72.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184916d1501209520-aerodynamic-discussion-thread-dscn1929_zpsac71aaef.jpg)
![Name: DSCN1957_zps9ebcd873.jpg
Views: 894
Size: 93.6 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184917d1501209520-aerodynamic-discussion-thread-dscn1957_zps9ebcd873.jpg)
Side Door Ducts
![Name: DSCN1944_zps8a628fac.jpg
Views: 918
Size: 100.1 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184918d1501209520-aerodynamic-discussion-thread-dscn1944_zps8a628fac.jpg)
![Name: DSCN1941_zpsabe3ed42.jpg
Views: 854
Size: 93.7 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184919d1501209520-aerodynamic-discussion-thread-dscn1941_zpsabe3ed42.jpg)
Side Door Ducts Open Door
![Name: DSCN1924_zps80610d36.jpg
Views: 862
Size: 97.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184920d1501209520-aerodynamic-discussion-thread-dscn1924_zps80610d36.jpg)
Bottom Side Door Ducts
![Name: DSCN1927_zpsc760f92f.jpg
Views: 1007
Size: 105.9 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184921d1501209520-aerodynamic-discussion-thread-dscn1927_zpsc760f92f.jpg)
Top Side Door Duct (Radiator/Intercooler)
![Name: DSCN1928_zps22255658.jpg
Views: 858
Size: 145.0 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184922d1501209520-aerodynamic-discussion-thread-dscn1928_zps22255658.jpg)
Clutch Cooler Duct
![Name: DSCN1937_zps37d68c06.jpg
Views: 905
Size: 93.8 KB](https://www.miataturbo.net/attachments/aerodynamics-119/184923d1501209520-aerodynamic-discussion-thread-dscn1937_zps37d68c06.jpg)
I have a lot more pics, if you want to see more I might have them.
Last edited by 1993ka24det; 04-12-2014 at 06:51 PM.
#486
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Airflow, Cooling, Airflow, Cooling, Airflow, Cooling... such high priorities for proper race cars, and so overlooked/low priority in the minds of many DIYers. Makes me feel good about all the time I'm putting into these two things right now on my own car. Thanks for the awesome pics
![](https://www.miataturbo.net/images/smilies/smile.gif)
#487
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Join Date: Oct 2011
Location: The Race Track & St Pete FL
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Which Pic?
Trying something new
That's what I'm working on and it hasn't been done on any other Miata.
I'm installing 5-10 NACA ducts on the underbody and making away for more air to make its way out of the back. Plus the V8's exhaust will come out on either side of the license plate. Still a work in progress...
![](https://www.miataturbo.net/attachments/aerodynamics-119/109527-aerodynamic-discussion-thread-dscn1901_zpsa0442b67.jpg?dateline=1397351717)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109528-aerodynamic-discussion-thread-backtoo_zps273ae8e4.jpg?dateline=1397351717)
Airflow, Cooling, Airflow, Cooling, Airflow, Cooling... such high priorities for proper race cars, and so overlooked/low priority in the minds of many DIYers. Makes me feel good about all the time I'm putting into these two things right now on my own car. Thanks for the awesome pics ![](https://www.miataturbo.net/images/smilies/smile.gif)
![](https://www.miataturbo.net/images/smilies/smile.gif)
That's what I'm working on and it hasn't been done on any other Miata.
I'm installing 5-10 NACA ducts on the underbody and making away for more air to make its way out of the back. Plus the V8's exhaust will come out on either side of the license plate. Still a work in progress...
![](https://www.miataturbo.net/attachments/aerodynamics-119/109527-aerodynamic-discussion-thread-dscn1901_zpsa0442b67.jpg?dateline=1397351717)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109528-aerodynamic-discussion-thread-backtoo_zps273ae8e4.jpg?dateline=1397351717)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109529-aerodynamic-discussion-thread-dscn0451_zpsdf9f8483.jpg?dateline=1397351717)
#490
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![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Trying something new
That's what I'm working on and it hasn't been done on any other Miata.
I'm installing 5-10 NACA ducts on the underbody and making away for more air to make its way out of the back. Plus the V8's exhaust will come out on either side of the license plate. Still a work in progress...
That's what I'm working on and it hasn't been done on any other Miata.
I'm installing 5-10 NACA ducts on the underbody and making away for more air to make its way out of the back. Plus the V8's exhaust will come out on either side of the license plate. Still a work in progress...
The stuff I'm working on is all on the front right now, basically reworking all of the airflow (both exterior and ducted) forward of the windshield.
-Ryan
#492
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I'm not understanding the headlight duct that exits in front of the front wheel on the McLaren? I've seen a similar setup on some 911s but I can't wrap my head around pushing air out at a 90 degree angle to the flow around the car. It must work if McLaren does it though...
#493
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I'm not understanding the headlight duct that exits in front of the front wheel on the McLaren? I've seen a similar setup on some 911s but I can't wrap my head around pushing air out at a 90 degree angle to the flow around the car. It must work if McLaren does it though...
Honestly, love the technology but not the shape.
#494
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Join Date: Oct 2011
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I'm not understanding the headlight duct that exits in front of the front wheel on the McLaren? I've seen a similar setup on some 911s but I can't wrap my head around pushing air out at a 90 degree angle to the flow around the car. It must work if McLaren does it though...
#496
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The one of the z4, you can see flexible hose running on either side of the engine from the front but they don't go to the brakes like normal. It looks like they go through the firewall and into the cabin
It looks like someone has already done what you're trying
This is a miata right? :P
Trying something new
That's what I'm working on and it hasn't been done on any other Miata.
I'm installing 5-10 NACA ducts on the underbody and making away for more air to make its way out of the back. Plus the V8's exhaust will come out on either side of the license plate. Still a work in progress...
That's what I'm working on and it hasn't been done on any other Miata.
I'm installing 5-10 NACA ducts on the underbody and making away for more air to make its way out of the back. Plus the V8's exhaust will come out on either side of the license plate. Still a work in progress...
![rofl](https://www.miataturbo.net/images/smilies/rofl1.gif)
![](https://www.miataturbo.net/attachments/aerodynamics-119/109667-aerodynamic-discussion-thread-sco5bgdyzshpcdzeye5x.jpg?dateline=1397493401)
#497
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Venting air above the rear diffuser is definitely common practice among race cars. Usually it's slower moving air that has already passed through heat exchangers, transmission tunnel, or a rear engine bay.
Less common but very cool is pulling fast-moving air from the sides and channeling it to the top of the diffuser to fill the space behind the car. Some LMPs have done this. Not sure how similar of an effect taking air from below the car would give, I'd be concerned about possibly decreasing diffuser effectiveness.
-Ryan
Less common but very cool is pulling fast-moving air from the sides and channeling it to the top of the diffuser to fill the space behind the car. Some LMPs have done this. Not sure how similar of an effect taking air from below the car would give, I'd be concerned about possibly decreasing diffuser effectiveness.
-Ryan
#499
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As a drastically simplified rule of thumb, downforce > reduced drag, so I'd expect that reducing the diffuser's effect to reduce drag wouldn't add up to a net improvement. In lap times, that is. If we're talking fuel economy that's a whole different ball game ![wink](https://www.miataturbo.net/images/smilies/wink.gif)
-Ryan
![wink](https://www.miataturbo.net/images/smilies/wink.gif)
-Ryan