I have a well mixed 45 min commute so I'll get some good feedback for you. The guys on the 993 forum seem to like them pretty well so we will see if the 996 does as well with them.

 

since you are using the stock springs the shocks might be hitting the internal bumpstops regularily.

I also have the same car and didn't notice much difference in ride quality with the HD's and stock springs other than much less body roll and brake dive, and sharp things like expansion joints are a bit more jaring.

 

Generally both Bilstein HD and Sports are what's known as high pressure shocks. One of the design characteristics and the reason why they are able to last a long time and perform without gradually falling off in their dampening qualities like other shocks.

Most Koni's are of the low pressure type so some prefer the dampening characteristics of those more.

With that said, I have experienced a slightly rough ride on Bilsteins but I have also experienced a good ride when matched with the "right" springs. I find OTS Koni Yellows to work better with stock springs with the lower spring rates. Koni's have always seemed to have the more refined dampening characteristics if comfort is towards the top of your priority list.

There was a pretty comprehensive shock dyno comparison on the net somewhere before that showed the broad dampening curve of the Koni's. Can't seem to find it now but it also showed shock dynos of the numerous generic Asian shocks which were amusing to see to say the least.

 

How would he hit the bumpstops if he has longer springs and stiffer shocks? That should make him less likely to bottom out on the stops. You mentioned "internal", are you suggesting the shock will be extended too far?

S.

 

FWIW, I opted for the HDs on my car. I didn't want to lower it or to make the ride harsher, because it's a DD and the roads in this city are atrocious. By comparison to the OE shocks, I found the HDs had better small bump compliance, but were a shade firmer under compression (being new probably helped, of course). I think they're a great solution for a car that won't see much or any track time. They kind of give you back the Porsche you bought in the first place.

 

My thoughts as well. I was under impression that the sport shocks were shorter than the HDs. If this is true would the ride differ using a longer (stock) vs. shorter (eibach) spring?