You are correct in the numbers.
The Sportauto Magazin numbers are from their own measurements. Since they (claim at least to) test ALL their test vehicles in the same way I will keep their numbers as reference since I can compare the NSX to other cars.
Actually, on a street car it is very difficult to get real downforce. MOST Porsches simpley have lift at high speeds, not downforce, even with spoilers.
I do know that on my own NSX, there was a marked difference at high speeds after I installed the NSX-R hood (from VIS), the airduct under it and covering up the whole front of the car. However, I have not come up yet with a way to measure downforce in an economic way.
The Sportauto Magazin numbers are from their own measurements. Since they (claim at least to) test ALL their test vehicles in the same way I will keep their numbers as reference since I can compare the NSX to other cars.
Actually, on a street car it is very difficult to get real downforce. MOST Porsches simpley have lift at high speeds, not downforce, even with spoilers.
I do know that on my own NSX, there was a marked difference at high speeds after I installed the NSX-R hood (from VIS), the airduct under it and covering up the whole front of the car. However, I have not come up yet with a way to measure downforce in an economic way.