Suspension Performance and How to Improve it!

[Never thought]

These days on the highway at high speeds (>120mph) I feel that the car floats way too much like a boat... It makes me nervous and I would like to do something about it. Will the Eibach springs help the car be more stable? or are coilovers the only answer?

I can say that the overall ride and handling had dramatically improved with the Eibachs. It feels much more stable to me and has eliminated much, but not all, of the float.

 

[Dochidalgo]

These days on the highway at high speeds (>120mph) I feel that the car floats way too much like a boat... It makes me nervous and I would like to do something about it. Will the Eibach springs help the car be more stable? or are coilovers the only answer?

Well, that was one of my suspension performance concerns. I have a fast style of driving (>120 <160 Km/hr) and the Eibach's springs and sway bars combo improve a lot, in my case, my Stinger's suspension performance.

 

[xot1]

OK I guess I have to give it a try! Thanks for the feedback

 

[mandasol]

I had the springs first and still had some shimmy at speed so a couple months later added the sway bars (front and rear). With springs and sways the car is much more settled.

 

[xot1]

I had the springs first and still had some shimmy at speed so a couple months later added the sway bars (front and rear). With springs and sways the car is much more settled.

Does it change the way it "handles" potholes at moderate speed?

 

[Stinger GT SS]

I would do front & rear sway bars first...it is a cheaper upgrade than spring changes & as a first step it may provide the result you require.
I only have the sways done & now it’s a totally different car to drive & it suits my driving style perfectly.
Those that have done springs first are still experiencing an unsettled rear when cornering at speed.
In the end it’s your choice to do what suits you, good luck with you decision & upgrades.

 

[Never thought]

Yeah. The shimmy is still there but reduced. I am hoping the ATQ subframe collars can cure that for me.

 

[mandasol]

I would do front & rear sway bars first...it is a cheaper upgrade than spring changes & as a first step it may provide the result you require.
I only have the sways done & now it’s a totally different car to drive & it suits my driving style perfectly.
Those that have done springs first are still experiencing an unsettled rear when cornering at speed.
In the end it’s your choice to do what suits you, good luck with you decision & upgrades.

I agree. Start with the sways first and see if it makes the difference you're looking for.

 

[xot1]

I would do front & rear sway bars first...it is a cheaper upgrade than spring changes

Is it?
The price here is (incl. labor)
Springs: $530
Sways (front & rear): $630
Neither is what I call cheap.

 

[Stinger GT SS]

Is it?
The price here is (incl. labor)
Springs: $530
Sways (front & rear): $630
Neither is what I call cheap.

Well if the prices you quote include parts & labour, that’s cheaper than here in OZ.
Front & Rear Eibach Sways are approx. AU$628 parts only then approx. 2hrs labour at about AU$110-$130/hr.

 

[Ozstung]

Yeah. The shimmy is still there but reduced. I am hoping the ATQ subframe collars can cure that for me.

Let us know your findings please.

 

[Not Here Anymore]

It was $324 CDN plus 3.5 hrs labour. Total $750 CDN. In the US the kit is $275 or so. The 3.5 hrs labour will still apply. NO BRAINER!

Hi Steve ,, I am thinking of doing the same to my stinger getting a stiffer set of coil over s like you have gotten !

 

[Steve Ostrowski]

Uh. It happened overnight. I was not at the dealer weeks before or after the update. In Canada the care is connected to the internet 24/7.

 

[Billy M]

Uh. It happened overnight. I was not at the dealer weeks before or after the update. In Canada the care is connected to the internet 24/7.

Huh?

 

[Not Here Anymore]

that I did know at all ,, that here in Canada car is connected to the internet 24/7 , very interesting indeed
,that mean it collects data for the car OMG

 

[MerlintheMad]

My take, the suspension needed to be tuned for Australia and Canada and the USA, not the Nurburgring.

At speed the car is nice (140K) but under that the shocks (all 4 corners) are too soft. So I just go 140 all the time LOL.

By this logic, wouldn't the tuning "over here" have to be at 140Km plus? So, it doesn't matter that they tested and tuned at the Ring, since they did it at speed. Besides, the Green Hell has every conceivable sort of surface, condition and demand on a car. It is the ubiquitous test. It's so perfect that the test track in Japan (blanking on the name) was built to duplicate the Ring and so they have a "mini Ring".

I have limited experience going fast. But what I can say is confirmation of what you said last year: going fast, the Stinger is planted. In fact the faster I went the more "hunkered down" it felt. That's what matters. Why complain about a "playful/floaty rear end" at civilized/legal speeds? That doesn't matter, if, when pushed to "spirited" speeds, the suspension stops bouncing.

 

[xot1]

140mph? I find that the car is not very stable at such speeds.

 

[Billy M]

140mph? I find that the car is not very stable at such speeds.

My STi felt “floaty” at 140 as well, but so do most cars are they approach their maximum velocity.

 

[Not Here Anymore]

My STi felt “floaty” at 140 as well, but so do most cars are they approach their maximum velocity.

I found at upper speeds , I found my Stinger GT Handle ok never reached the limiter!

 

[Not Here Anymore]

140mph? I find that the car is not very stable at such speeds.

personally I have make sure my tires are inflated to 38 front AND back 36 psi cold but I have found the EIbach springs, and rear sway bar really made the suspension stiffer and better over all handling !