plymouthcolt

I know you can lower the 993 using either of these setups, but why would you choose one setup over the other? Is one better for tracking or autocrossing?

winsome

pss9 is adjustable in height, compression and rebound (level 1-9). you can have softer setting for street use and set it at the hardest during track event. its one of the best thing you can add to a 993.

Winsome

Traffic53

second this one. user adjustability is the difference. ...that being said, i've never adjusted mine...though i'm sure i will.

Terry Adams

That's why, given my street only use, I got the RoW M030/HD.

f_scaife

Robin has a great right up over at p-car.com

chris walrod

The PSS-9's are only rebound adjustable, but are height adjustable until your hearts content

97Targa

Yep. Me too.

mrsullivan

i was told by mechanics, fellow enthusiasts, 993 owners, etc... that for any planned significant track use, get the PSS9. if plan to do very little track time, get the M030/HD setup. i have not driven a 993 with PSS9 extensively, so cannot comment on that setup. however, since installing my M030/HD setup (took awhile to get ride height just right, etc.) i have really enjoyed the feel and look of the car.

TheOtherEric

Chris- according to the damping curves in the Performance Products catalog, the PSS9 adjustment ***** alter both rebound and compression simultaneously. Do you have reason to think that's not true?

I agree with mrsullivan; if you're not doing lots of track time, M030 is a better choice. My car came with US M030 (which I think is the very similar to ROW M030 except for height) and I thought it was GREAT for street/highway driving. I really don't like my PSS9 setup much on the streets & highways but it's a great compromise solution.

DJF1

the biggest difference in my book are the spring rates. The PSS-9 is signficantly stiffer especially at the rear which is close to 600lbs spring rate.

Mark in Baltimore

The PSS-9's are great if you like to fiddle with the car at the track and want to alter handling characteristics with shock settings and sway bar adjustments. Lots of people have run a non-adjustable suspension and do just fine, be it doing DE's or club racing, and would rather not endlessly tweak things.

chris walrod

This info was from shox.com, which I wouldnt be too surprised if they were mistaken. They are on a few other issues with respect to Bilstein customer service..

TheOtherEric

I think they must be mistaken. From Bilstein's web site:

"Although numerous manufacturers say they are able to adjust the damping force, a closer look later on reveals that it's only possible on the rebound stroke. The B16 PSS9 suspension from BILSTEIN is currently the only system on the market that really permits adjustment of the damping force, with the shock fitted, on both the compression and rebound strokes..."
http://www2.bilstein.de/en/produkte/faq.php3#43

The graph here resembles the one in Performance Products catalogue:
http://www2.bilstein.de/en/produkte/...gleich.php3#16

Solitude

Have both. I like the M030's better..

plymouthcolt

Thanks guys. I guess M030 ROW is what I would want.