Down force

[xNEVER-ONEx]

How do I increase down force without adding a custom wing. For example, on the Viper ACR, I kept the stock wing, but I can't adjust it.

 

[Exorcet]

How do I increase down force without adding a custom wing. For example, on the Viper ACR, I kept the stock wing, but I can't adjust it.

The Viper ACR is not modeled correctly. You can't adjust its aerodynamics or suspension.

 

[xNEVER-ONEx]

The Viper ACR is not modeled correctly. You can't adjust its aerodynamics or suspension.

So do I have to put on a ugly custom wing do improve aero? Any other cars I just get a heads up for?

 

[Exorcet]

So do I have to put on a ugly custom wing do improve aero? Any other cars I just get a heads up for?

Yes, you need to buy a wing and full customize suspesnion to get a "real" Viper ACR.

I don't know what other cars lack realistic tuning.

 

[partica]

Sorry for dredging this up again (I used the search!) but I'm wondering the same thing too and this isn't really an answer. There are cars that you can't add a wing to. The Vayron for instance has terrible aerodynamics. It has that silly automatic wing that comes up (is there a way to just force it come stay up?) but it's useless really. Someone once said to me, "When you have a car that fast, you're going to leave the ground." That seems like BS to me? I have race cars that are faster then the Vayron that stick to the ground way better and actually turn when you want them to. It seems like the issue is Aerodynamics right?

Anyway, Is there something else that I can do like lowering the suspension or raising the back end or something? would that help? I seem to have this issue with a lot of my "Fast" cars that I tune up (F1, Vayron, Evora etc.). But not on any of my purpose built race cars and I'm trying to figure out what the difference is.

 

[Sum1s2pid]

Sorry for dredging this up again (I used the search!) but I'm wondering the same thing too and this isn't really an answer. There are cars that you can't add a wing to. The Vayron for instance has terrible aerodynamics. It has that silly automatic wing that comes up (is there a way to just force it come stay up?) but it's useless really. Someone once said to me, "When you have a car that fast, you're going to leave the ground." That seems like BS to me? I have race cars that are faster then the Vayron that stick to the ground way better and actually turn when you want them to. It seems like the issue is Aerodynamics right?

Anyway, Is there something else that I can do like lowering the suspension or raising the back end or something? would that help? I seem to have this issue with a lot of my "Fast" cars that I tune up (F1, Vayron, Evora etc.). But not on any of my purpose built race cars and I'm trying to figure out what the difference is.

The Veyron has great aerodynamics. Enough to keep it planted, yet slippery enough to achieve mind-boggling speeds. When stock, any problems with it's handling or braking can be attributed to it being faster than expected, and blowing corner entry speeds. Being AWD can amplify its perceived cornering difficulties. Though not great, it's a better car than it's given credit for. Braking early does wonders, as does not mashing the throttle.

If you tuned them, as you've said, there would be less issues, as there are many ways to correct some of its odd behavior. I'm sure there are good tunes in the appropriate forum, but I'm too lazy to look.

Since you can't increase the Veyron's front downforce or decrease its rear, try:

Softer tires on all four corners. Softer tires on the front. Harder tires on the back. More negative front camber. Less negative rear camber. Less rear toe-in. More front toe-out. More rear toe-out. Softer front springs and / or dampening. Harder rear springs and / or dampening. Softer front sway bars. Stiffer rear sway bars. Lower the front suspension. Raise the rear suspension.

 

[ElSecundo]

Someone once said to me, "When you have a car that fast, you're going to leave the ground." That seems like BS to me? I have race cars that are faster then the Vayron that stick to the ground way better and actually turn when you want them to. It seems like the issue is Aerodynamics right?

That someone is essentially right. In the absence of devices to increase aerodynamic downforce, a car that fast will lift. All cars are basically shaped like a wing, and the path of air going over the top of the car is longer than the path for air moving underneath the car. This creates lower pressure above the car, and the faster you go, the more lift this generates.

Most modern race cars have external devices that provide negative lift (downforce), ie, wings. They control the pressure underneath the car by using a splitter on the nose of the car. Underneath the car (and out the back -- the 'diffuser'), they use venturi tunnels to generate negative lift. Very few street cars are using venturi tunnels and/or diffusers. The effect is so strong, that many cars generate enough negative lift that they could drive upside-down once they reach a high enough speed. In the Porsche Museum, they have a 956 mounted upside-down on the ceiling as a display to demonstrate this. I doubt that any street cars can generate that much negative lift, partially because the street tires they use aren't rated for that extreme a combination of downforce and speed.