Bruce

This is the follow up to my Drag Coefficient thread, this shows what a number of various vehicles develop at 200 km/h in the Daimler-Chrysler Wind tunnel.The list isn't a long as you might expect, but it was only until recently Sport Auto started measuring both the front and rear aerodynamics (before, only rear)


Essentially there are four categories, and they follow as: Vehicles with all-around downforce, vehicles with neutral downforce, vehicles with mixed (half lift/half downforce) and lastly vehicles where there is lift all-around. Vehicles will be listed alphabetically.

*Please note there are vehicles missing (987 Boxster S and etc)

Front end = Rear end

Green Lettering will indicate downforce

Red lettering will indicate lift

Grey lettering will indicate netural


Vehicles with downforce all-around



Lamborghini Murcielago 6.2: 34kg= 1kg

Lamborghini Murcielago LP640, optional spoiler 34kg= 11kg

Mercedes-Benz SLR McLaren: 19kg = 35kg

Pagani Zonda C12S 7.3: 8kg = 53kg

Pagani Zonda F: 1kg = 25kg

Porsche Carrera GT: 49kg = 40kg


Vehicles with all-around neutral aerodynamics:



Porsche 997 GT3: 0kg = 0kg



Vehicles with mixed aerodynamics



AC Schnitzer 6er Tension: 9kg = 8kg

Alpina Roadster S: 2kg = 40kg

Dodge Viper SRT-10: 15kg = 18kg

Ford GT:44kg= 2kg

Koenigsegg CCR:13kg= 11kg

Ferrari 360 Challenge Stradale: 10kg = 21kg

Mercedes-Benz CLK DTM: 37kg = 12kg

Mercedes-Benz C55 AMG: 2kg = 33kg

Porsche 996 GT3: 13kg = 0kg

Porsche 996 GT3RS: 19kg = 25kg

Porsche 996 Turbo:7kg =6kg

Porsche 997 GT3 RS2kg =10kg




Vehicles with Lift all-around



AC Schnitzer V8 Topster: 65kg = 30kg

Audi B7 RS4: 34kg = 15kg

Audi 2.0 TT TFSI: 23kg = 24kg

Aston Martin V8 Vantage: 48kg= 13kg

Aston Martin DB9 Coupe: 42kg= 18kg

BMW 335i: 48kg = 28kg

BMW M6: 15kg = 26kg

BMW E46 M3: 5kg= 18kg

BMW E60 M5: 13kg= 19kg

BMW M3 CSL: 1kg = 10kg

BMW Z4 3.0CSi: 28kg = 43kg

Chevrolet Corvette C6: 54kg = 28kg

Ferrari F430 Berlinetta: 11kg = 6kg

Ferrari 575M Maranello: 61kg= 40kg

Jaguar XKR, 2007: 18kg = 22kg

Lamborghini Gallardo: 15kg = 18kg

Maserati GranSport: 50kg = 29kg

Mercedes-Benz SLK55 AMG: 23kg = 31kg

Mercedes-Benz SL65 AMG: 29kg= 33kg

Porsche Cayman S: 30kg = 19kg

Porsche 997 Carrera S: 20kg = 7kg

Porsche 987 Boxster S: 25kg = 20kg

Renault Megane Trophy Sport Auto Edition: 2kg =15kg

Volkswagen R32 MK2: 2kg= 34kg

ree

Wow!! The "Lift all-around" data are very impressive. It most be horror to drive these cars at top-speed!

Imhotep Evil

So now do I want uplift+uplift, downforce+downforce or neutral ?!

Bruce

The best situation would be downforce all-around, but neutral isn't bad either.

EDIT: For high speed driving like the Nurburgring the above is most likley best.

PC Valkyrie

Good question. My guess is that it depends what type of car you want when you're travelling at high speeds. I presume that cars with significant downforce in the front will make very good high speed cruisers because the steering will feel very "weighted", giving a sense of "stability".

PC Valkyrie

Another issue to keep in mind is that these numbers were obtained in a wind tunnel, which simulates flowing air around a stationary car. In essence it is measuring downforce or lift when the car is traveling at a constant velocity of 200km/h.

When a car is accelerating, there is shifting of weight towards the rear of the car, so this will add to "downforce" to the rear wheels.

Zonda

Well, not aerodynamic downforce. When you accelerate the center of gravity is moved towards the back giving more weight to that area. Aerodynamic downforce does the same but using the air instead of forces.

PC Valkyrie

Yup, agree 100%....that's why I put "downforce" in quotes. The bottom line is there will be more weight on the rear wheels when accelerating.

Imhotep Evil

No Z06 numbers ?!

Bruce

Not yet.. These figures are exclusive to Sport Auto's supertest so each of these vehicles has been through the test