How can they be bouncy? This is terrible IMO

I never had any experience with upgrading any car suspension, but i have uprated suspension on motorbikes. I don't know what happens with cars but on bikes an aftermarket suspension is an improvement in every way. Better handling, braking, no bouncing, smooth etc

 

which suspension on cars is the equal of Ohlins on bikes?

 

Cars are no different. A good aftermarket suspension upgrade improves everything. You want something that compares to what Ohlins is to bikes? Moton and JRZ is it for Porsche's.

 

What about PASM?

 

Once you go this route, PASM is out. The only PASM compatible solution out there is the Bilstein PSS10 or a lower spring setup. That is it as far as I know. Just remember, you will lose any compression or rebound adjustability once you go with the PSS10 or lower springs. You will have the height adjustability with the PSS10 though.

 

Doug,

I do not know if we are describing the same thing, but if by bouncy you mean rubbery, then you might want to consider rear after-market drop links. That is the difference that I found when I installed the Tarett drop links: More direct, less rubbery. http://www.tarett.com/items/996-997-...lnk-detail.htm Otherwise, I think this is the effect of the linear spring (versus progressive): not as good when there are big street bumps. Hope this helps.

Milou,

See what Got Boost wrote above re. PASM. All correct.
For the Turbo, the Bilstein Damptronic has made many Turbo owners exceedingly happy. However, it could not be the best for every situation -- nothing could. Its design goal is: mostly street, occasional track. It gives you 4 pre-set dampening curves and then vary the dampening using the car's sensors & brain. What you get with the Bilstein then is the peace of mind of pratically having Porsche re-design the coilover for you to a more sporty setting. (Bilstein is the same company that makes the stock shock absorber and rumors are it uses Porche's chief test driver in some consulting capacity.)

For an all out assault on the track, you will be better off with, for example, Moton, or JRZ, or Bilstein's own version of a more track oriented coilover. These more advanced, and technically superior shock absorbers, allow for multiple adjustments: low and high speed bound, low and high speed rebound. (And if you are scratching your head about what I just wrote, then the Bilstein Damptronic is for you. Just kidding. )

However remember that paying more and get the "best" does not necesserily mean happiness. For example, a system that is best for the track by necessity will be bone rattling stiff for the street. In addition, setting up these shock absorbers *is* black art and must be reserved for the very best of suspension tuners and advanced and knowledgeable drivers. You must be able to give the tuners feedback with each setting. And not just the "that's too stiff, that's too soft" kind of feedback either . (IMHO, this eliminates about 90% plus of Porsche Turbo owners, me included of course.) Reading past postings on various forums, I have run across situations where it seems owners are never satisfied and could not find the one sweet spot for these complicated systems. With this aspect, the Bilstein's simplicity is a huge advantage. Its settings are pre-determined by professionals so there is no guess work on your part.

Seeing that your car is a convertible (and having guessed its intended use -- sorry I am wrong ), I wouldn't think Moton is an appropriate match. But this is a personal decision only you could make.
When it comes to suspension setup, every step involves some kind of trade-off/sacrifice -- for example stiffer does not always mean better. So do your "due diligence" search and read up some more of reports from web amateurs like me, and good luck.