MY sister has a 350z and when we go to work( which is a 30 min drive on the highway ). I notice the Z drive and handle bumpy on the road. It coudln't be the road because they had just redone the road. DOes this problem exist in all Z? BTW she has an at touring

 

yeh, mines like that too, it just has a stiffer suspension.

 

sports cars all have stiff suspension setups.

 

i love it, i love feeling the road and all the bumps, very sporty

 

How would you adjust it so it wouldn't have the bumpy ride?

 

aftermarket suspension or get a luxury car

 

Tires with a taller sidewall should do the trick.

 

girls just can't drive.

 

Suspension + Tire Upgrade.

 

what type of suspension upgrade? actualy, i drove it and its still bumpy -_'

 

Its a sports car. Its gonna ride a bit rough.

 

Get Koni adjustables.

 

Personally, I went with the Hotchkis Sports Springs & Adj. Sways (TVS Stage 1) w/ the Koni Yellow Sport Shocks. There's "plenty" of posts on this site regarding this "bouncing" feeling you're talking about so I would try do a search. Try looking for keyword: "bounce". Keep in mind, the type of suspension upgrade will depend on [A] driving style/type (i.e. track, daily driver, etc...) & [B] how much money you want to spend. Good luck!

 

To improve ride quality and eliminate bouncing you need to change the shocks, there are many aftermarket shocks to chose from. It doesn't sound like you need to spend money on springs or sway bars to fix your problem unless the ride is too harsh (firm), then you might want to also try the Tein H.tech springs, they're still firm but not as firm as stock, but shocks will make the biggest impact.

My Z bounced like crazy until I put on the Konis, what a huge improvement, they transformed the car and smoothed out the ride without making it rough, you'll be amazed how much better the ride will be with decent shocks.

Almost any aftermarket shocks will be a big improvement over stock. The Konis are more expensive then some other shocks and they're awesome on the Z.

 

Does the softer ride compromise the performance?

 

Yes, a little at-the-limit performance is lost but unless you track your car I doubt you'll notice and the ride is still firm, these springs are great for daily drivers. Most of the loss comes from an increase in body roll which can be largely offset with tighter sway bars. The car launches better now because the rear end squats and grip is improved.

 

If you want no bumps may I suggest a Lexus.

 

If you want to be a loser jerk may I suggest you make ignorant comments that benefit no one. Oh, never mind, you did.

 

I have a '03 db touring. You might be suffering from the "bouncy" suspension. That is different from a stiff suspension

My '03 suffered from a bouncy suspension. Some theorized the stock springs were too soft. The bounciness is especially apparent on worn cement freeways. The car gets into this porpoising rhythm that used to make me nauseous.

To compare and contrast I rode in three different stock sports cars over the same freeway (los angeles, 110 north of the 10 through downtown). I believe this section of freeway is the worst in the city). I rode a m3, 530i with eibach coilovers, a porsche, and my Z.

My conclusion is that the firm suspension of the other cars definitely made you feel the road but did not cause the car to start porpoising.

As a result, I changed my suspension to tein flex coilovers with edfc. EDFC is a electronic box that controls motors attached to each of the coilovers and allows to to adjust the dampening force in the car.

The edfc is unnecessary for daily drives, I usually just turn it off. But it is useful when driving aggressively through twisties.

The tein flex feel real nice. The bounciness made me a bit hesitant when I drove the car hard in the mountains. Now the bounciness is gone. The car rides a bit lower as well and feels generally more planted on the ground. Driving on asphault freeways feels like you're gliding on ice, which is real cool.

I am particularly sensitive to motion sickness because of a head injury I sustained in a motorcycle accident a few years back which is the reason why I intensively researched this issue. I used to get sick driving by downtown LA every week.

I do not know if swapping out the springs will fix the problem, but if cost is a consideration and you only want to get rid of the bounciness I'd suggest that course of action. From what I've read it should help.

Aftermarket coilovers will cost you several thousand dollars installed.