I’ve yet to go over 120MPH due to sway

[Pyrotik]

As title says, I’m almost afraid to go over 120 or honestly anywhere near it due to the feeling of front end looseness. At around 95-100 I just feel like I’m slowly losing control and even the slightest adjustments make the car float around the road too much where I thought it would really dig down and stay tight to my lines.
is anyone else familiar with this by chance?

now I am at 25k miles and still have the stock front tires on but they honestly don’t need to be replaced yet.

 

[nhcowboy28]

Merp.

 

[JSolo]

I certainly hope you're doing this on a closed track (or in the middle of nowhere). Wildlife becomes a danger with the latter. Nothing like hitting a deer at 120 mph.

See the video in this post - Stinger wreck caught on dashcam Seems appropriate to your concern.

Which trim car do you have, what tires?

My model (see sig) had its tires replaced within the first few hundred miles because they were not up to my standard handling wise. There's no place around here for triple digit speeds nor do I have desire to track this car. However, I do enjoy fast cornering and knowing my tires will stick.

 

[SIMONGUEY]

my fastest was 150 heading towards la from the bay area! 260 miles of straight driving on a two-way road! I love to leave at night time because it's almost 100% empty

 

[Pyrotik]

Merp.

What does merp mean?

 

[Pyrotik]

I certainly hope you're doing this on a closed track (or in the middle of nowhere). Wildlife becomes a danger with the latter. Nothing like hitting a deer at 120 mph.

See the video in this post - Stinger wreck caught on dashcam Seems appropriate to your concern.

Which trim car do you have, what tires?

My model (see sig) had its tires replaced within the first few hundred miles because they were not up to my standard handling wise. There's no place around here for triple digit speeds nor do I have desire to track this car. However, I do enjoy fast cornering and knowing my tires will stick.

Yea it was in a safe space, otherwise even around 95 or so playing with other cars is where I feel the car floating.
I have a GT with stock fronts and Firestone Indy 500’s on the rear.

 

[JSolo]

What's a stock front?

 

[Pyrotik]

What's a stock front?

I believe they are pilot powers

 

[JSolo]

I believe they are pilot powers

Well... There's your problem. You shouldn't be running a motorcycle tire on a car.

Michelin PILOT POWER Tires | Michelin USA

Find out all about Michelin PILOT POWER tyres information, characteristics, reviews, performance and size details. Check out the nearest Michelin dealer in USA.

www.michelinman.com

Actually they're great tires but super low treadlife. I ran the pilot road series on my bikes.

GIGO

 

[JSolo]

In all seriousness, could be a bunch of things. Mismatched tires, wrong psi, defective tires, suspension issues, missing body panels (covers under the front/rear of the car), etc...

 

[SIMONGUEY]

I need that front undercover but don't even know the proper name xc but besides that! is there a speed limit on the Kia? would 200 mph be possible? not saying id do it but I more of want to know the type of thing.

 

[Pyrotik]

In all seriousness, could be a bunch of things. Mismatched tires, wrong psi, defective tires, suspension issues, missing body panels (covers under the front/rear of the car), etc...

Yea I meant pilot sports lol. But yea I was more wondering if it's just a regular characteristic of the car or if mine was having a small issue somewhere. Like my dad runs his accord 2.0 sport regularly and says his car stays solid the entire time. I feel like im bouncing around an awful lot.

 

[JSolo]

IIRC they're governed based on the tires that come with. RWD get higher speeds than awd given they come with summer tires. I believe mine is governed to 130mph.

2022 Kia Stinger Specifications

Kia Motors Media Journalist Information News

www.kiamedia.com

Not sure why the OP's car is getting floaty. Insufficient details provided.

To the OP, to fix your problem, don't go at a speed where car becomes floaty

 

[MerlintheMad]

I have a GT with stock fronts and Firestone Indy 500’s on the rear.

There it is: you do NOT mix brands; not even same brand, different performance grade tires. I would even say that it is unrecommended to mix tread patterns from the same manufacturer.

Yea I meant pilot sports lol. But yea I was more wondering if it's just a regular characteristic of the car or if mine was having a small issue somewhere. Like my dad runs his accord 2.0 sport regularly and says his car stays solid the entire time. I feel like im bouncing around an awful lot.

The car gets more "hunkered down" the faster it goes: if everything as designed is in place. I know this empirically. On Hwy 95, heading toward NV from OR, the two-lane is arrow straight; but it also has humps in it. I took my GT1 with less than four months of ownership up to 155 MPH easily, with a feeling of complete safety: in fact, it was still pulling c. 1 MPH per second in 7th gear when I backed off (155 was my goal on that run).

Since then, I've had my car up to and a tad beyond 130 MPH briefly passing fast: with well worn PS4 OEM on the front and PS4S brand new on the back: it was completely stable and confidence inspiring.

Also, what drive mode were you using? If you're going to try for high speeds you should only be in Sport mode (max stiffness and steering feedback).

 

[MerlintheMad]

IIRC they're governed based on the tires that come with. RWD get higher speeds than awd given they come with summer tires. I believe mine is governed to 130mph.

2022 Kia Stinger Specifications

Kia Motors Media Journalist Information News

www.kiamedia.com

View attachment 62213

Not sure why the OP's car is getting floaty. Insufficient details provided.

To the OP, to fix your problem, don't go at a speed where car becomes floaty

The GT/1/2 come with both squared A/S and staggered summer tires. The A/S, being rated "W", have a limit of 140 MPH (the tire itself is speed rated at 168 MPH). The Michelin summer tires (PS4) are speed limited at the advertised 167 MPH (the tire itself is speed rated at 186+ MPH). AWD or RWD have nothing to do with it. It's all decided at the factory based on the tires.

 

[JSolo]

^^Indirectly then. Did they ever offer AWD with summer tires? Even as an option?

 

[MerlintheMad]

^^Indirectly then. Did they ever offer AWD with summer tires? Even as an option?

Yes of course: my AWD GT1 came with the PS4.

 

[Pyrotik]

There it is: you do NOT mix brands; not even same brand, different performance grade tires. I would even say that it is unrecommended to mix tread patterns from the same manufacturer.

The car gets more "hunkered down" the faster it goes: if everything as designed is in place. I know this empirically. On Hwy 95, heading toward NV from OR, the two-lane is arrow straight; but it also has humps in it. I took my GT1 with less than four months of ownership up to 155 MPH easily, with a feeling of complete safety: in fact, it was still pulling c. 1 MPH per second in 7th gear when I backed off (155 was my goal on that run).

Since then, I've had my car up to and a tad beyond 130 MPH briefly passing fast: with well worn PS4 OEM on the front and PS4S brand new on the back: it was completely stable and confidence inspiring.

Also, what drive mode were you using? If you're going to try for high speeds you should only be in Sport mode (max stiffness and steering feedback).

Yea I was in sport mode when doing something like that. I didn't think that a difference in tires would make a noticeable difference especially that big, doesn't seem reasonable to me. And yea, I thought it was supposed to hunker down but it feels like it gets lighter.

 

[RM7]

If you are not AWD, there is no issues mixing tires F to R, you do want to have the same size tires as OEM for correct ride height and the same type/use tires, like summer performance, if that's what you are running in the rear. This has been done for years and there are no problems with it. Even using the same tires doesn't guarantee better handling, differences in tire width, rim width, sidewall support, front weight bias, etc., are all too numerous to think that the same tire F and R somehow fixes or equalizes all these things. There are better tires, so you wouldn't want to be putting economy tires up front if running good high end performance tires in the rear. But again, like use and like size, no problem. You are going to wear out rear tires faster anyway, handling is not going to be the same front to rear. It's virtually impossible for it to be.

 

[MerlintheMad]

Yea I was in sport mode when doing something like that. I didn't think that a difference in tires would make a noticeable difference especially that big, doesn't seem reasonable to me. And yea, I thought it was supposed to hunker down but it feels like it gets lighter.

Believe this: I would never have pushed faster if the car started to get "floaty" on me. It did the opposite, much to my surprise and gratification. I believe I said aloud at the time: "This is great! Kia wasn't lying when they said that they tested this car at the Ring!"