How to eliminate understeer?

[Hallowenman]

I really like GT3 racing, and I drive the McLaren mostly. Whenever I switch to the BMW I feel like it has huge problems with understeer. I am not good at tuning so I'm asking here for tuning help. I have heard that reducing rear grip/downforce (less rear wing value) will help the front end, but compared to the McLaren the BMW also likes to slide a lot more, so I want rear end traction.

Any tuning tips? :)

[yusupov]

just fyi GT3 cars have traction control so you can press ctrl+T to enable it (idk what the default is). unless things have changed, step 1 is the STRONGEST in AC and the higher the step, the WEAKER the TC gets.

[Hallowenman]

I guess that will solve the traction problem, but that doesnt help with the understeer problem?

[yusupov]

no, understeer i think want to change toe settings mostly, but i dont know how to setup cars tbh. i just steal other peoples setups :D

itd be a good thing to learn, ofc

[IMPERIAL]

The McLaren is designed to handle the corners better while the BMW is designed to have more speed. It is possible to make them behave similarly by adjusting the setup, but that is not an easy task.
Things you can do:
- Increase front camber (actually this is moving the slider to the left).
- reduce front suspension stiffness
- reduce front roll-bar
- reduce front dampers
- reduce front tyre pressures
- Increase front height
- Increase suspension travel

You understand by now that a lot of testing is necessary to find the right values for all these variables, and I didn't mentioned them all.
If you do too much the car will not under-steer but it also will not be willing to rotate, making a larger circle when turning.

Edit: reducing transmission dif. coast also helps.

[Maddawg]

Originally posted by Hallowenman:

I really like GT3 racing, and I drive the McLaren mostly. Whenever I switch to the BMW I feel like it has huge problems with understeer. I am not good at tuning so I'm asking here for tuning help. I have heard that reducing rear grip/downforce (less rear wing value) will help the front end, but compared to the McLaren the BMW also likes to slide a lot more, so I want rear end traction.

Any tuning tips? :)

I had that problem too with the BMW M3 GT2. I was able to fix it, but first what wheel are you using?

[Hallowenman]

Originally posted by Maddawg:

Originally posted by Hallowenman:

I really like GT3 racing, and I drive the McLaren mostly. Whenever I switch to the BMW I feel like it has huge problems with understeer. I am not good at tuning so I'm asking here for tuning help. I have heard that reducing rear grip/downforce (less rear wing value) will help the front end, but compared to the McLaren the BMW also likes to slide a lot more, so I want rear end traction.

Any tuning tips? :)

I had that problem too with the BMW M3 GT2. I was able to fix it, but first what wheel are you using?

Logitech DFGT. I have recently experienced problems with AC and my wheel actually, but easy to fix and doesn't happen in any other racing sims I play. This isn't related to the car understeering, but when I launch AC, I turn maybe 45 degrees on the wheel and it turns to the max in game for the car Im using. But just had to close the game, go to the Logitech wheel software and press OK on the wheel setup and relaunch the game and then its working.

[Maddawg]

I just want to know if you were using the Logitech Profiler and you are it seems. In the Global Device settings turn your Degrees of Rotation to 450 deg, and check the box that says Allow Game To Adjust Settings.
Next, in game menu. Force Feedback: Gain=100%, Filter=0%, Damping=0%, Min Force=5% Steering Settings: Gamma=1.00, Filter=0%, Speed Sensitivity=0
Next, in Realism menu. Traction Control=Factory, Stability Control=50%, ABS=Factory.

You need to drive with these setting for several laps before the brain begins to accept the differences. This should reduce the understeer considerably. Let me know how it works for you.

You might also want to try playing with Pedal Settings: Brake Gamma. I have mine set at 1.43 because I like a light foot application to brake. Maybe you should try that or a heavier foot application. Moving the slider to the right increases the amount of force you have to apply to slow down. But do that lastly.

[Michael]

Originally posted by IMPERIAL:

If you do too much the car will not under-steer but it also will not be willing to rotate, making a larger circle when turning.

That doesn't make logical sense. Understeer *is* the car not turning. If you balance the car the other way it should be more inclined to oversteer.

But most times when people complain about understeer it's because of the way they are driving.

[delirivmcordia]

Outside of aero adjustments, I find decreasing the differential settings is the best way of tackling understeer and getting the car to turn better.
It'll take some zeroing in though, because (depending on your driving style) you can render a car completely undriveable/unpredictable if you randomly slide the settings all over the shop.

You'll want to analyse which corners you're having trouble with, look at your throttle application (or non-application) and apply the settings accordingly.

[Ragequit Inc.]

Originally posted by Michael:

But most times when people complain about understeer it's because of the way they are driving.

Yup. 87,4% of understeer is overdriving. Scientific fact. ;)

[Hallowenman]

Originally posted by Maddawg:

I just want to know if you were using the Logitech Profiler and you are it seems. In the Global Device settings turn your Degrees of Rotation to 450 deg, and check the box that says Allow Game To Adjust Settings.
Next, in game menu. Force Feedback: Gain=100%, Filter=0%, Damping=0%, Min Force=5% Steering Settings: Gamma=1.00, Filter=0%, Speed Sensitivity=0
Next, in Realism menu. Traction Control=Factory, Stability Control=50%, ABS=Factory.

You need to drive with these setting for several laps before the brain begins to accept the differences. This should reduce the understeer considerably. Let me know how it works for you.

You might also want to try playing with Pedal Settings: Brake Gamma. I have mine set at 1.43 because I like a light foot application to brake. Maybe you should try that or a heavier foot application. Moving the slider to the right increases the amount of force you have to apply to slow down. But do that lastly.

I don't understand why I should adjust the degrees of rotation to 450. At the moment it is at 900 and in-game I set the settings to 900 degrees, so when I turn 50 degrees I turn 50 degrees in the game. Correct ratio, realistic. If I turn it down I will turn much more in game? That will give a results of lots of turning, overheated tyres, bad grip?

[Ragequit Inc.]

Originally posted by Hallowenman:

Originally posted by Maddawg:

I just want to know if you were using the Logitech Profiler and you are it seems. In the Global Device settings turn your Degrees of Rotation to 450 deg, and check the box that says Allow Game To Adjust Settings.
Next, in game menu. Force Feedback: Gain=100%, Filter=0%, Damping=0%, Min Force=5% Steering Settings: Gamma=1.00, Filter=0%, Speed Sensitivity=0
Next, in Realism menu. Traction Control=Factory, Stability Control=50%, ABS=Factory.

You need to drive with these setting for several laps before the brain begins to accept the differences. This should reduce the understeer considerably. Let me know how it works for you.

You might also want to try playing with Pedal Settings: Brake Gamma. I have mine set at 1.43 because I like a light foot application to brake. Maybe you should try that or a heavier foot application. Moving the slider to the right increases the amount of force you have to apply to slow down. But do that lastly.

I don't understand why I should adjust the degrees of rotation to 450. At the moment it is at 900 and in-game I set the settings to 900 degrees, so when I turn 50 degrees I turn 50 degrees in the game. Correct ratio, realistic. If I turn it down I will turn much more in game? That will give a results of lots of turning, overheated tyres, bad grip?

Yes, you want it at 900. I'm assuming he meant that, but even if he didn't, ignore it. :)

[rudski]

If you're not aware the game adjust the wheel rotation and locks it to the cars specification.
Leave it at 900 and make sure in the profiler settings to "allow game to make changes" or something to that effect.

If you change it to 450, 200 or anything else you're doing it wrong.

[delirivmcordia]

Originally posted by rudski:

If you change it to 450, 200 or anything else you're doing it wrong.

This.
Why do so many people make it harder for themselves?

Just keep your profiler + in-game numbers consistent and AC will do the rest automatically.

[Maddawg]

Oh yeah, forgot to mention, Deg of Rotation in-game. Set at 220, Yes set at 450 deg. in Profiler. But thats ok, don't listen to me, keep doing what you're doing.