Wobbling, bouncing around - high speed cornering
 

Recently switched over to a new set of wheels with stock-size tires(stretched unfortunately).

19x9.5 +22 245/40/19
19x10.5 +22 275/35/19

Car handled great before the switch. It now feels extremely unstable on high speed cornering or highway "quick" lane switch. It feels like a ripple effect, car bounces right to left/left to right and I feel like I may spin out and lose control.

Recent changes other than wheels:
-Hotchkis Front and rear sways
-Whiteline Differential mount bushing

Any ideas? :confused:

http://i35.photobucket.com/albums/d1...psb7qs2lrj.jpg

Are you feeling this in the rear? or the entire car?

Mostly in the rear of the car

I see you're on Hotchkis now and seeing that I've been on them for years.

Your problems are that the hefty front sway bar is making it more sensitive to road imperfections.

I noticed the road sensitivity myself But the trade off is the better lateral response on twistys.

Also the new tires need to break in so give them a few hundred miles.

In all there's nothing really wrong with the changes, But I would suggest getting an alignment to be on the safe side.

Oh and the those Hancrooks are for a dd so don't do anything serious with those tires or you're going to find out why their popular.

Because they're cheap!

LOL! But they were okay with stock wheels, in fact, everything was okay with stock wheels. they aren't new tires actually, pulled them from stock wheels.

I'm just worried something has gotten loose overtime

I would give the air pressure a check too, Last time I had tires mounted the shop had the pressures all over all over the place, all was high. I would get an alignment done too,
be surprise how much of a difference it makes.

I checked the pressure, all set to 35psi. I'll have to lift up the car and check everything :icon14:

If the rear bar isn't at the softest setting, you should change to it. After you've done the other stuff. Also, your dampers may not be up to the Hotchkis bars.

So it appears that everything remains the same except for the new wheels. Perhaps one or more of the wheels isn't properly balanced. I'd also check to ensure that the lug nuts are correctly torqued. Other than that I guess you could get under the car and check to ensure that nothing has loosened up ... but if the only thing that has changed is the new wheels, I'd start there.

Are you running proper size hub rings with those wheels.

Make sure you are using the correct lug nuts with proper torque.

What kind of wheels are those? They could be out of round. You might also try road force balance.

Did you do an alignment with the new wheels? I bet your toe is off

I haven't done an alignment nope. Last time was Sept 2014

I agree. Check the wheel "stuff" first ... proper hub rings, lug nuts (correct type and torque), and balance.

these are Varrstoen ES9, they come in only 73.1 hub size. They gave me the new lugs so they "should" fit right. I torque the lugs to 95 ft-lbs.

I'll go talk to the wheel place see if they can verify the balance again.

Turns out I'll need hub rings :icon14:

Good to know ... problem solved. A relatively cheap fix.

I hope so. Going to get them after work then test drive. We'll find out soon enough.

Lugs torqued to 95 ft/lb's ? Factory torque is 80 ft/lbs FYI

Good point. When you re-mount the wheels after the proper hub rings are installed, torgue the lug nuts to the proper spec (80-85 ft/lbs) ... and tighten them down in a cross-pattern sequence to ensure proper fitment.

Please get an alignment as well asap. Few bucks spent now will save you lots of money on tires later on.

I just was working with the same problem corner bounsing and my fix was more camber and extending front end links about 1/8" to harden front sway bar with preload. For now with hochkins sway on the back with softest setting feels much better then before next weekend will be testing with stock rear sway.

Still having the same problem. Gonna have to check out the balance then replace rear sway then get alignment

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I'm experiencing the same symptoms (especially bad in the rain last night) but my change to the car was installing eibach lowering springs (2 days ago). Reading through the thread it sounds like I'm due for an alignment.

Hey zefaulter, where are you getting your alignment done? :)

I can't believe why you guys are driving around without a proper alignment. Do you hate your tires and want faster tyre wear and worse handling?
Alignment is cheaper than new tyres every 5k miles.

Mine is being done tomorrow morning at Level Auto. LOL

I go to level auto as well, great guys!

Just an update, the problem is my rear sway bar links. Ordered SPL replacement, I'll update the thread one I install those. Alignment is not the problem

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You say alignment was good?
ck.what it was before you added the lowering parts/as you lower;it gives you more negative camber,
I don't have any lowering springs-but on alignment movement's;;;when you adjust the camber negative(top of tire lean inward)it will also move the rear toe negative(front of tire will point outwards)
Rear must have some Positive Toe or the Azz end will be dancing around;especially at higher speeds & hard acceleration or deceleration.
For a quick check before taking it in;measure the width on the front side & backside of rear tires (on a common tread groove)
Good to have a helper & be sure to stretch an even pull/as high as possible(3 or 4" from ground) without contacting underside of car.
wouldn't hurt to ck. the front also ;;;But Remember;the rear Toe Spec.call's for about twice the positive toe as the front.
On a level surface,you should have 1/8---1/4" closer gap on Front side of rear wheels.
Fuel level will affect this measurement.
Actual specs. for total Toe on rear are (min 0.079" Nominal 0.146" max 0.213")
I got mine set on the higher end w/stock ride height,,,car behave's well.
The rear camber & toe are adjustable on Stock ~Z~ w/the Factory eccentric bolt's.

Seen your last post after i replied....

Just got my alignment done! She's back to normal! :driving:

Did you get a printout?

So was the problem fixed? I've been dealing with the same similar issue and haven't been able to solve it.

Sway bar endlinks. So far so good. :) http://uploads.tapatalk-cdn.com/2016...10f3eb01e4.jpg

So it's not fixed :(

:eek:.. no improvement at all???

I thought it went away but I was wrong. Doing 80kph on a bumpy road felt unstable but 160 on a good road was fine. It might be the road plus the stiffer diff bushing. I'm out of ideas

uhh... hope datz not ur garage flooring.. :ugh:

No, but I use it all the time. Soft and comfy to crawl under the car on

One more thing for you to check... Are the tires still spinning the same direction as they where originally? Old-school says you shouldn't swap sides when rotating tires because something bad happens to the tires. What I know to be a fact is that the wear, especially on the fronts, will make the tires feel loose for at least a few hundred miles while they wear in. It will be worse than new tires for a while.