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A german car magazine had measured some values far back. Anyone with the numbers?Yes and no. If you use simple wings at the front or the rear then yes, downforce will increase drag. But if you work on the underbody and speed up the air with a diffusor (well more F360 like than the infinitesimal one on the NSX) you gain downforce for free. A lot of the NSX-R NA2 improvement was done on the underbody, esp. the front part, esp. compared to the 91 model. It helped the air under the car to the rear part of the car. It's said that it's more important to control the air flow in the front half of the underbody than in the rear one. Have a look at this article: http://autospeed.com/cms/A_110872/article.html where a guy tried to reduce the drag by convering the rear underbody. The front of this car is a brilliant work of aerodynamics but the rear 'looks' unfinished. The rear of the NSX underbody also looks 'unfinished' or like a 'compromise' due to therminal requirements (enigne overheating?).Flushing the wheels with the fender is not so critical and could be a drawback, sep. if the wheel itself allows for a lot of turbulences within the fender which results in increased drag. Have a look at the wheels in the article, they're Pizza-like. This is aerodynamically optimal. From my memory I have in mind that with larger rims it took longer to reach 150 mph+.
A german car magazine had measured some values far back. Anyone with the numbers?
Yes and no. If you use simple wings at the front or the rear then yes, downforce will increase drag. But if you work on the underbody and speed up the air with a diffusor (well more F360 like than the infinitesimal one on the NSX) you gain downforce for free. A lot of the NSX-R NA2 improvement was done on the underbody, esp. the front part, esp. compared to the 91 model. It helped the air under the car to the rear part of the car. It's said that it's more important to control the air flow in the front half of the underbody than in the rear one. Have a look at this article: http://autospeed.com/cms/A_110872/article.html where a guy tried to reduce the drag by convering the rear underbody. The front of this car is a brilliant work of aerodynamics but the rear 'looks' unfinished. The rear of the NSX underbody also looks 'unfinished' or like a 'compromise' due to therminal requirements (enigne overheating?).
Flushing the wheels with the fender is not so critical and could be a drawback, sep. if the wheel itself allows for a lot of turbulences within the fender which results in increased drag. Have a look at the wheels in the article, they're Pizza-like. This is aerodynamically optimal. From my memory I have in mind that with larger rims it took longer to reach 150 mph+.
