chuck911

Okay, my bad. And maybe this is another one, but I thought I remembered reading somewhere that PDCC cars also have a different power steering setup. They use the old always-on hydraulics where the cars without PDCC get the newer on-demand system.... or something like that....?

chuckbdc

I saw a post to that effect. My bogon detector went off.

chuck911

Okay, so I tried posting this on the Autocross forum too but there's like one guy there.... which was, uh, me.... so... has anyone tried Autocrossing PDCC? Does it work with really fast transitions like slaloms? And yes I do plan to autox this car a lot.

simsgw

I haven't done it myself, Chuck, but I can offer one technical observation. PDCC should increase the frequency of dynamic roll response. That is, the car will be able to go from full loading in one direction to full loading in the other more quickly than a car without PDCC. I can't guarantee that, because I've neither read the spec's on PDCC implementation nor driven one in anger, but it seems almost inevitable.

Oh, and I should say that dynamic roll response is crucial to the autocross venue.

Gary

SiNi

Yes to PDCC - love it!

I was able to compare my PASM PDCC 991 with a similarly equipped non-PDCC 991 loaner which i drove for several days while my PDK software crash was fixed. Driving on fast country roads (not track) the PDCC car is extremely smooth and more comfortable over bumpy roads. It's stiff when you want it to be and compliant when you don't and it feels grippy as hell!

If nothing else I would order it purely for the additional comfort in daily driving. Also I am really looking forward to exploring its limits on track. The whole long-term maintenance thing is a non-issue to me. The 991 is full of technological marvels so why wold one worry about PDCC going wrong more than any other system on the car? As suggested in a previous post, the advanced technology is something you buy into with a 991. If you have negative thoughts about this from the start then maybe its not the car for you!

Hotmetal

+1

fbroen

There is a readers letter published in the latest Excellence Magazine that I interpret to say that the PDCC cars' always on hydraulics interact with the steering. I didn't think so, but would be curious to hear more.

fbroen

I ran my SPASM PDCC in a couple of PCA auto crosses this past season. I am no auto x specialist, but I went from mid-pack with my 997.1 to fastest car on stock street at one of the events(!). (Exclamation point for the car, not my driving skills.)

My other observation was how much less understeer the 991 does compared to my 7.1 -- which is why I read the PDCC might increase understeer references with some amazement.

Can't wait for my first proper DE (the track in my avatar was fun fun fun, but now I need some instructions).

holminator

PDCC definitely improved my autocross performance in a huge way. That's all I'm saying because false modesty is a core value.

chuck911

That's what I was thinking. Dang! Because the other guy is right too. You want to autocross, and be competitive, then you better have every edge allowed in your class. Sounds like PDCC is moving from maybe to must-have. Oh well. Softer bars definitely equates to greater comfort, and that's important too!

chuckbdc

Chuck, you appear to be coming to the same conclusion that Porsche did about PDCC. That is good, because the bottom line is that by better controlling roll rate it keeps tire contact patch in optimal position. Other things being equal, that will get around faster.

hlee1169

Yes. I have tremendous fun with PDCC on the track and street.

DrJay

Walter Rohrl himself likes PDCC. That is enough of an endorsement for me...

chuckbdc

First it was PDK, then PDCC. I can hardly wait until the discussions start about four wheel steering.

holminator

In 2005, it was PASM and PSM. Sigh. People just need to give up and go see a doctor.

http://youtu.be/85PcMJ9D8X0