Need for speed, seriously

[mookieit]

Noticed when driving over 90, the car begins to lose its stability.

Steering begins to shake, alignment begins to shift, rattling and vibrating just an overall wonky experience.

What could I do to the car to make it more planted on high speeds?

For context, I typically drive around 80 and rpms ~2500 rpm and it is just once in a while when there is open space, I experiment and was wondering if I can make it better at high speeds then mabey on lower speeds it will be better as well.

i have the 2015 v6, stock 17 inch rims with a second set of the oem hankook ventus s1 noble tires and Peddlers basic suspension kit

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[ORRadtech]

How many miles on the car?
Have you had your front suspension inspected?
There are plenty of suspension modifications for the S550 platform for you to spend plenty of money on. However, your car should be pretty solid up to and over 100 in its stock form. I know my '18 ecoboost convertible is.

 

[mookieit]

How many miles on the car?
Have you had your front suspension inspected?
There are plenty of suspension modifications for the S550 platform for you to spend plenty of money on. However, your car should be pretty solid up to and over 100 in its stock form. I know my '18 ecoboost convertible is.

I have 152K miles and haven’t had front suspension inspected. What is that?

You are right, I start wobbling at around 95 ish

 

[ORRadtech]

I have 152K miles and haven’t had front suspension inspected. What is that?

You are right, I start wobbling at around 95 ish

Front suspension; ball joints, control arms, tie rod ends, sway bar, shocks, springs, sway bar links, numerous bushings, you know, the stuff that let's you steer safely...
Find a good mechanic and have them check the front end. At 150k+ I'd expect them to find some wear and loose components.

 

[Swtbabybilly]

thats a lot of miles id bring it to a good mechanic and have them give everything a good look over, usually if you feel the shake in the steering wheel its and issue with your front suspension if you feel it more in your seat its the rear suspension hopefully that can atleast narrow down which area you think is the issue. Best of luck and whatever is wrong just upgrade it

 

[Keeffa]

Get the whole stop the hop goodies. Fit all the spherical bearings. Brace everything, and sway bars. I've gone back to standard shocks, springs and struts and it handles pretty good. At 200 kph it's planted.

 

[Nightmonkey]

@Keeffa That would be going from bad to worse—he would lose all comfort. The suspension is simply worn out; he should just have it inspected, replace all the relevant parts with OEM ones, get it adjusted, and he's good to go.

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