Air spring vs progressive coil spring ?

[Tymatk]

Hi

I noticed my X5 is a bit jumpy, specially the rear which is equipped with Air Spring.

I was doing 100km/h on the highway, over some pot holes and i could feel the rear jump to the side abit, not enough for me to counter steer, nothing like that but you get the picture.

So i start to wonder, how is this Airspring compare to proper progressive coil spring? Can it obsorb the road condition as fast as the coil spring?

I've raced on many tracks in Aust like Phillip Island, Sandown, Winton ..... etc, have no problem control a car at highspeed but this car is meant to be for the Wife to drive so i'm a bit worry.

[diyanich]

I don't know why you think that spring would matter if it's the shock absorber that matters in this situation.
Air spring are meant to keep the rear end height at constant level no matter the load,unless your load exceeds the engineered weight limit.

Originally Posted by Tymatk

Hi

I noticed my X5 is a bit jumpy, specially the rear which is equipped with Air Spring.

I was doing 100km/h on the highway, over some pot holes and i could feel the rear jump to the side abit, not enough for me to counter steer, nothing like that but you get the picture.

So i start to wonder, how is this Airspring compare to proper progressive coil spring? Can it obsorb the road condition as fast as the coil spring?

I've raced on many tracks in Aust like Phillip Island, Sandown, Winton ..... etc, have no problem control a car at highspeed but this car is meant to be for the Wife to drive so i'm a bit worry.

[Tymatk]

So with normall springs, they flex .... what about Air Spring?

[diyanich]

Pretty much the same with air springs,isn't it?
What happens to any inflated ball when it hits the ground?
It bounces back,now if it had a shock absorber,it wouldn't let it get to that point,and when it would get back to its original shape,absorber would slow down the process.Therefore it wouldn't jump as kinetic energy would get absorbed and converted into other type of energy on that scale.

Originally Posted by Tymatk

So with normall springs, they flex .... what about Air Spring?

[Tymatk]

Cool thanks.

How about other X5s? A bit sporty bumpy as well?