Is that suspension the coolest thing you ever saw, or what? First time I saw it, had to look and look and study the video and then DAMN! What a mind-blowing concept! Only thing, shoulda been Stuttgart. But, way to go, Mercedes!

 

 

 

Also FWIW I remember reading anecdotal evidence here that PDCC would enhance tire life on the track as it would keep the tire flatter overall.

I have it and like it.

 

Had it on my 4S and have it on the Turbo S. Like it on both cars . Keeps the car flatter in turns I have never had any problems with it.

 

This is backwards. PDCC doesn't make a soft suspension stiffer. It makes a stiff suspension softer by changing the length of the sway bar drop links, thus changing the effective stiffness of the bars. It's not for the track, it's to make a stiffly-sprung car less jarring on the road. I have it in my car and can't really tell it's there on street and track. But I haven't had enough seat time in a non-PDCC car to make any meaningful comparison.

 

I found this explanation. Is this an accurate description?

When the PDCC console button is deactivated (light is off), both the PASM and PDCC is put into a "normal/comfort mode" which softens the compression damping of the shocks, adds some rebound damping, and reduces both the front and rear roll stiffness (PDCC). The PDCC is always active, it's mode is altered.

Conversely, when the PDCC console button is activated (light on), the dampers are stiffened by a large amount and the PDCC is put into "performance mode" which severely controls chassis roll depending on other factors (if it thinks you're turning or going over bumps, etc).

 

 

Don't forget, Mercedes is also headquartered in Stuttgart.

 

When the 991.1 was introduced (early 2012), Porsche's literature described it as providing something like 13 seconds faster time around the Nurgbergring than the previous model when equipped with Sport PASM (shorter stiffer springs (+additional 20mm lower than PASM) and stiffer roll bar, and PDCC, in an S (which also had the mode sensitive, stiffening" engined mounts). They attributed about half of the gain to the SPASM and half to the PDCC.

As I understand it, the SPASM option gives mode sensitive damper rebound rates and the faster/sharper response makes the car feel like it "rides harder" at hight rates. The PDCC varies roll stiffness by mode and speed and keeps the car "flatter" - the principle advantage for track times being that it keeps the tire contact patch at its maximum.

Thirteen seconds is a lot of time, but over a very long run at high momentum speeds at the "Ring. I don't know how that would transfer to a more typical track (e.g., 2-3 miles), but damper rebound rate, center of gravity and contact patch are important variables around any track -other things being equal.

 

Early PDCC-equipped 991s didn't even have PDCC marked on the button. I think it became even more confusing when they started adding it to the button (before there was no external way to know your car was equipped with PDCC).

 

You mean besides just looking at it???