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Message: [QUOTE="LeGeNd-1, post: 13225700, member: 91639"] PD aero values has been shown to be messed up for a lot of cars. - Road going hypercars often lack front downforce leading to severe understeer balance at high speeds. - Track cars like Vulcan are classified incorrectly and given too little downforce (it should have comparable amount to the P1 GTR and Zonda R for example). - The McLaren F1 has too much downforce for such an old car with simple aero, which results in it not being able to reach its real life top speed. - On the other hand, the LaFerrari has too little downforce & drag, which results in ridiculous 400+ km/h top speeds. - Old race cars like the 330 P4/XJ13/GT40 should barely have any downforce but they have quite a lot. - Old and new race cars in the same Group has the same downforce values, even though we know they obviously don't from their relative performance (e.g. F1 GTR vs GT3, old vs new Super GT, Group C vs modern LMP). - Underbody downforce is not accounted enough in most cases. Pitch sensitivity and rake doesn't really affect aero balance as much as it should. More discussion here: [URL]https://www.gtplanet.net/forum/threads/top-speed-physics.384845/[/URL] Also, we never know what those numbers in settings screen represents. The closest would be kg of downforce but even that is not accurate for a lot of cars. Also in real life you do not have 100s of clicks of adjustments like that. In ACC, GT3 cars have maybe 1-3 front splitter levels and around 10 rear wing levels. Even F1 cars, the most aerodynamically complex race cars on the planet probably only has 20-30 wing adjustments max. So either way GT's aero tuning is FUBAR as well. That's the problem though, some road super/hypers have too much downforce in the game, but [B]only at the rear[/B] which causes serious understeer at high speeds. The GT3 RS has 100 rear DF in the game. We don't know what unit it is, or at what speed is this achieved. It's lower than the 350 kg you quoted (which I assume is total front + rear DF), but higher than the 30 kg "usable" DF at 80 km/h. As a result this car just plows at high speeds because there's nothing on the front to balance it. The Group 3 cars has something like 300 F/700 R in the game, which total gives 1000 kg possibly being accurate according to your numbers. [/QUOTE]

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