The depth in tuning a BMW M5!!!

[KiwiBoy]

Hello. Im asking you guys if you can help me tune my M5. There is only one little problem with this car. The steering is very neutral and it handles nice. But when I am braking into a turn and I turn the steering wheel, some understeer appears, Anyone know how to reduce this understeer? Thanks for all the help! 👍
Keep up with the great website GTP

 

[Ske]

Understeer will happen when you're braking and steering at the same time.

To keep it in 'layman's terms':
The front tires can handle a certain amount of stress.
Steering causes sideways stress.
Braking causes forwards stress.
These types of stress add up.
If you stress the tires more than their limit, they'll lose grip (hence understeer).

Solution: Brake earlier, and let go of the brakes when you turn in After turn-in, you can try the brakes a bit more if you still have too much speed (trailbraking). Alternatively, you can brake ever so slightly while turning in if you don't turn the wheel too much (Keep brake stress + turning stress under the tire's stress limit)

Note: I said stress, but I guess it's called 'load'.. doesn't matter if you get my point

If the car handles great at other times, I wouldn't mess too much with the settings. One alternative could be to try a brake balance controller biased a little towards the rear, adding a wing with some downforce, grippier tires, or some LSD (Not recommended though, it could really ruin the handling of your car)

 

[KiwiBoy]

Thank you for replying, I thought that no one was gonna to write anything.
I have a wing on the car and the back downforce is greater then the front downforce and I'm gonna try the brake balance tomorrow when I have time.
Thank you again for giving me such good explaination.

 

[niky]

Yup... one added reason that the car understeers is that it's heavy... very heavy. And thanks to the great suspension, you'll only really notice it under braking. Since it's a big car, you might just want to drive around the problem instead of ruining your settings.

 

[KiwiBoy]

I think I'm going to post my M5 settings so you guys can have a try at it. 👍

M5 setting coming soon...