bumblebee wrote:The bushes that are spoken of in this thread that got replaced from Siberian bushes
viewtopic.php?f=72&t=19335&p=395279&hilit=Siberian#p395279Im no expert on suspension. But are they the bushes in the arms in the photo that is shown by Moonman in this thread?
How many kilometers do the bushes usually last before they give up the ghost?
As an example I did the same swaybar conversion on my own car with bushes from 2010 with 160,000km on them, I've done around 40-50k more and the bushes are still in good condition, no perishing or movement. The bushes in the arms that I sold had done 69,707km so should last a fair while longer.
Of course with anything there are outliers and variance but if in doubt the bushes from your current arms can be a substitute.
Poly bushes I personally don't think are much use in the back as the arms are clamped solidly by the sub frame and wheel spindle each end so are subjected to little backwards forwards movement, but that is just opinion not an expert assessment.
sarusa wrote:Notice as stated by Mooman, adding a rear sway bar reduces over steer.
Yet my understanding from arguments elsewhere is, that a rear sway bar will cause the rear of the car to break away earlier,
causing me to stay clear of fitting one. Realise improves handling and stiffens ride slightly.
My knowledge on this is limited. Can someone set me straight?
Roll over verses spin out?
Suspension is a complicated system and I'm no expert but this is how I understand it.
The stock ES bar is only a 18mm solid bar, it adds enough roll stiffness to notice but not enough to cause any drastic, dangerous handling issues. The car will still understeer (not oversteer), just won't push in corners as much and be closer to neutral steering.
If you go too stiff on the back it can cause the inside back wheel to lift in extreme high speed cornering putting all the weight on the outside wheel which then relies on one tyre to counteract lateral movement.
Swaybars are all about slowing down weight transfer, the stiffer the slower the weight transfers to the other side/end. Stiffing the rear by a stiffer bar or adding a bar slows down the weight transferring from the front to the back and from left to right, keeping weight over the steering wheels which increases their grip and reducing the amount of weight that transfers to the outside of turns. Yes it can cause the car to oversteer if done to the extreme as the front has much more grip than the rear.
What it also does is reduce the amount of camber and toe change in the wheels as they move through their range of motion as they are kept closer to the same relative orientation left to right, making their level of grip more predictable.
But what is probably most important are the tyres, if they can't handle the forces you throw at them then the car can't corner as fast regardless of suspension setup.
