RWD/AWD

[DeltaV]

Most OEM stuff is set up to heavily understeer, as it's deemed safer than neutral or oversteer. Oversteer "seems" like more fun, but that's when it's in a controlled environment or when you are expecting it. With my car, the weight of the car and the brakes easily overpowered the dinky 225 wide tires. If you are staggered, you are probably going to understeer significantly. Moving to a wider or square setup with the front tires may help this get closer to neutral, as well as other things mentioned, like swaybars.

Crappy OEM tires plus these pretty crappy OEM widths leads to poor turning traction, when the weight of the car is substantial. These cars *should* have at least 255 all around IMO and from there maybe 275 or 285 in the hottest version.

If this is to me, I’m running 245F and 255R Michelin Pilot Sport 4S, a relatively square setup with a reportedly decent tire.

Also, I’m not complaining about understeer or oversteer. I’m trying to figure out what system is electromechanically altering this balance in the middle of a steady state corner with steering held constant and throttle held constant and all nannies (that I can think of) turned off. It’s like Lane Keep Assist, or torque vectoring, or something, is unnecessarily imposing input into the event in a very regular, even time pattern, seriously degrading the car’s capability.

 

[stoopid]

If this is to me, I’m running 245F and 255R Michelin Pilot Sport 4S, a relatively square setup with a reportedly decent tire.

Also, I’m not complaining about understeer or oversteer. I’m trying to figure out what system is electromechanically altering this balance in the middle of a steady state corner with steering held constant and throttle held constant and all nannies (that I can think of) turned off. It’s like Lane Keep Assist, or torque vectoring, or something, is unnecessarily imposing input into the event in a very regular, even time pattern, seriously degrading the car’s capability.

I think Kia uses standard brake assisted torque vectoring.

 

[vipeboy2000]

I think Kia uses standard brake assisted torque vectoring.

Yep . Only brake based torque vectoring.

 

[DeltaV]

…and it works by grabbing and releasing the appropriate brake disk in a square wave at very regular, second to a second and a half, intervals?

That seems awfully slow. I would expect brake pulses at least as quick as ABS.

But thanks for the information. It’s unnerving on tight, guardrail-less mountain twisties to have the car suddenly decide to open your steering arc rather than allow a little tire slip.

 

[vipeboy2000]

…and it works by grabbing and releasing the appropriate brake disk in a square wave at very regular, second to a second and a half, intervals?

That seems awfully slow. I would expect brake pulses at least as quick as ABS.

But thanks for the information. It’s unnerving on tight, guardrail-less mountain twisties to have the car suddenly decide to open your steering arc rather than allow a little tire slip.

it does seem slow... and obviously it's hard to know exactly what it feels like without us being in the car too... But i can say I've never felt anything like that with traction and stability off... not even with it on. When i still had the Primacy tour tires on it that didn't have much grip, the initial grab of stability control just clamped down and slowed the car down and placed the car towards the direction of the steering wheel, then just modulated the throttle and brakes to keep it at that path , none of this one second grabbing and letting go causing strange understeer/oversteer situation... That is very very odd.

 

[DeltaV]

it does seem slow... and obviously it's hard to know exactly what it feels like without us being in the car too... But i can say I've never felt anything like that with traction and stability off... not even with it on. When i still had the Primacy tour tires on it that didn't have much grip, the initial grab of stability control just clamped down and slowed the car down and placed the car towards the direction of the steering wheel, then just modulated the throttle and brakes to keep it at that path , none of this one second grabbing and letting go causing strange understeer/oversteer situation... That is very very odd.

Ok. Thank you!

I’ll investigate it as a fault and see where it gets me.