Changing out 2009 springs and shocks with 2010 parts

[Disaster]

Off topic, but it's a widely misinformed info regarding the collapse.
Even some physics books say it was resonance that caused Tacoma bridge to collapse, but it's aeroelastic fluttering that caused it to go down.

more info: http://en.wikipedia.org/wiki/Tacoma_Narrows_Bridge_(1940)

Dan

That might be a more correct technical term, but the general principle is the same. In the case of aeroelasic flutter, the actual deformation of the structure (in this case the bridge) causes the wind inputs to create greater forces and therefore larger deformation. The inputs were amplified but this did not alone break the bridge. What did break it was the bridge started swinging, back and forth and the inertia, coupled with the wind force, eventually caused the bridge to fail. If the bridge hadn't kept swinging to larger and larger amplitudes (like when you push a kid on a swing) it would not have failed. Damping is responsible for stopping the amplitude from increasing.

Here is a quote from a Wiki article on aeroelasticity.

http://en.wikipedia.org/wiki/Aeroelasticity

Flutter is a self-feeding and potentially destructive vibration where aerodynamic forces on an object couple with a structure's natural mode of vibration to produce rapid periodic motion. Flutter can occur in any object within a strong fluid flow, under the conditions that a positive feedback occurs between the structure's natural vibration and the aerodynamic forces. That is, that the vibrational movement of the object increases an aerodynamic load which in turn drives the object to move further. If the energy during the period of aerodynamic excitation is larger than the natural damping of the system, the level of vibration will increase, resulting in self-exciting oscillation. The vibration levels can thus build up and are only limited when the aerodynamic or mechanical damping of the object match the energy input, this often results in large amplitudes and can lead to rapid failure. Because of this, structures exposed to aerodynamic forces - including wings, aerofoils, but also chimneys and bridges - are designed carefully within known parameters to avoid flutter

 

[genesis 45]

Hello all again......................i have just installed the new rear sway bar on my car..............the bar looked almost the same but the bushing were approx one half inch longer and appeared to be softer then the old one.........the sway bar was the april 09 production version...........the one i told don about in nov of 2009 is not available yet, but i bet the bushings will be even bigger/softer on that version, but not sure............it is intersting the price for the new one was actually 30 dolllars less then the old one.....i now have all upgraded parts on my pre 4/9/09 production car and the ride is much better over all surfaces.......not much softer, but just much more controlled............i drove my buddys infinity m45 and it is almost as good as his vehicle over the roads that caused so much trouble before.. It drives bettter then his car on the freeway, smooth roads and fairly smooth roads...........the total cost for parts for all parts was approx. 1300.00 ....... The sway bar was very easy to install.....total of 8 bolts.......and at 90.00 i may just upgrade it again when the nov 09 part is available..........later

 

[Disaster]

Hello all again......................i have just installed the new rear sway bar on my car..............the bar looked almost the same but the bushing were approx one half inch longer and appeared to be softer then the old one.........the sway bar was the april 09 production version...........the one i told don about in nov of 2009 is not available yet, but i bet the bushings will be even bigger/softer on that version, but not sure............it is intersting the price for the new one was actually 30 dolllars less then the old one.....i now have all upgraded parts on my pre 4/9/09 production car and the ride is much better over all surfaces.......not much softer, but just much more controlled............i drove my buddys infinity m45 and it is almost as good as his vehicle over the roads that caused so much trouble before.. It drives bettter then his car on the freeway, smooth roads and fairly smooth roads...........the total cost for parts for all parts was approx. 1300.00 ....... The sway bar was very easy to install.....total of 8 bolts.......and at 90.00 i may just upgrade it again when the nov 09 part is available..........later

Where are you buying the parts from. $90 seems pretty cheap unless you are getting some kind of dealer discount.

 

[GripperDon]

Hello all again......................i have just installed the new rear sway bar on my car..............the bar looked almost the same but the bushing were approx one half inch longer and appeared to be softer then the old one.........the sway bar was the April 09 production version...........the one i told don about in Nov of 2009 is not available yet, but i bet the bushings will be even bigger/softer on that version, but not sure............it is intersting the price for the new one was actually 30 dollars less then the old one.....i now have all upgraded parts on my pre 4/9/09 production car and the ride is much better over all surfaces.......not much softer, but just much more controlled............i drove my buddys infinity m45 and it is almost as good as his vehicle over the roads that caused so much trouble before.. It drives bettter then his car on the freeway, smooth roads and fairly smooth roads...........the total cost for parts for all parts was approx. 1300.00 ....... The sway bar was very easy to install.....total of 8 bolts.......and at 90.00 i may just upgrade it again when the nov 09 part is available..........later

Thanks for chiming in. I had not wanted to say where I got the info without your approval. You have proven that REAL improvement can be made but Hyundai should have at least cut you a check for the $1300 and you did the labor for free. You sticking to it has opened up that lid to let everyone see Hyundai does know of the problem and will fix it for the sake of new sales but not customer satisfaction.

PS we have some streets here that have the lanes mis aligned so that the tar strip does not hit both tires at the same time and it is a bad ride so the weaker anti roll bar helps on them. ( think we all really know how a anti roll or sway bar works.) The main purpose of Softening it up on the Genesis is that the Genesis is so oven stiff and the shocks so slow on rebound that the car literly skitters when it goes over a bump with any side movement at all that is the stuttering feeling that many have commented about. The softer sway bar will reduce the coupling between the dies and keep the car in better contact with the ground. The real problem facing the Genesis folks is the trade off between ride height, spring rate and required initial or free length of the spring. They need a softer rate and to maintain same ride height this requires a longer free length spring than will easily fit for replacement. The new shocks are also still too tight (slow) on rebound and this slowness allows the tire to loose contact with the ground so they are struggling with their complete problem WHICH IS the suspension was designed for a different approach from the beginning AND THEY REMOVED IT to make it cheaper for the USA and had to stuff in springs and shocks where they really didn't have room for them. Result is too little room for the springs hence higher spring rate and Harsh ride. Then the California engineer put a lot of guys in the rear and "Tuned it' by the "seat of his pants" and we got what we got, a car that when heavily loaded with cargo, folks and fuel is barely OK but, with only a driver and uneven lanes, and road surfaces it is up against the stops (so to speak) and is overly stiff and harsh. Putting in softer springs and letting the car ride about 1 to 1.5 inch lower and plain American touring shocks would do the trick. This requires some springs I can't find and will require a spring compressor to sneak in the extra 2 or so inches of free length spring. Hopefully some one will provide such springs in the future. I know it is not going to be a Hyundai that will not even acknowledge the problem and the real solution of installing the KDM active suspension system or making it available in the USA. The only way to get it will probably be as replacement part after the Equis comes in.