The fronts have now been in for a week along with new lower control arms (alloy) and stock upper strut mounts (No negative camber than stock)
It all feels so much better that the CD player has stopped skipping (Yay!) except over really bad expansion joints (one bridge in particular is really bad) The suspension guys (Fulcrum Suspensions) set the fronts at one and a half turns up from the softest setting, it was a little jarring so I have backed it off to a half turn from the softest position. This is twofold as it will allow the front suspension to 'settle in' and it stops highlighting the fact that the rears are shot , lots of bouncy bouncy and a not inconsiderable amount of squat when you get hard on the gas.

So onto my question, I picked up the rears today and I plan (best laid plans and all that) to fit them in the next couple of days. My question goes out to the guys who have the Koni adjustable/Eibach Sport spring setup. This is not to discount any other opinions and or useful information that other members here may have.

I ultimately would like to minimise the squat, but as the compression (within the shock) is preset is there a good rule of thumb for the rebound setting? I have done numerous searches here and web wide and I can find numerous mentions that the Koni/Eibach setup is great but no real guidelines as to the rebound settings that would be suitable.

More importantly how does rebound affect the handling of the car?

Does rebound help to control the attitude of the car i.e. Driver inputs, steering, braking, accelerating?
Or does it control the balance of the car over rough surfaces?

I am just a little confused as to what effect rebound damping adjustability has on the cornering, braking and accelerating inputs, especially if one is say at a track day.

I understand that many people like varying degrees of 'firmness' I personally don't mind firm, but I have to consider the other occupants of the car. With the front's set at the half turn up from the softest setting it is a nice ride, (way better than before) I am getting much more feedback through the wheel than before and it turn's in, holds and can change line with a great deal of precision over average road surfaces, so I will leave the fronts for now.

The problem is that the rears you cannot get to once they are fitted into the car. I would like to hear opinions/experiences that others have had on the settings as I would like to minimise having to take them in and out to get a nice 'compromise' setting. This is not to say that I won't be pulling them to 'tweak' but if I can get close to the mark, with help then I won't be chasing around all over the place.

It also comes back to an understanding of what changes to the handling of the car very high or low rebound settings will have. My guess is that if you have a far to stiff rebound setting that this will induce power oversteer and that too soft will induce power understeer?

Thanks for reading this far, if you made it........ I will keep on searching for an understanding of rebound settings and the effect they have on the car.

Cheers!