simsgw

Good question. Obviously some fractional loss because power is used to make PDCC work. I'll bet it's not much though, because it is one of the classic energy-recovery situations long before the phrase became jargon.

Gary

holminator

Had I not driven both PASM and non PASM I would never have known the articles I read about PASM were pure BS. That was 2005. Here I am again in the same scenario seven years later. If I had not driven both non and with PDCC I would never have realized the press articles were BS.

holminator

The extra weight issue was also brought up in 2004-2005 regarding PASM. It's funny to hear the same arguments against seven years later for PDCC. Once the turbo version comes standard with PDCC everyone will fall in-line just like last time. Zzzz

MASHAT

The GT3 came up with no PDCC, Interested in hearing thoughts about this. Another question is there real variations between cars with PASM VS PASM + PDCC?? I consider my self to be an extreme driver, honestly when the suspension is off the car rolls!! I have to note I do not have a PDCC.

chuckbdc

Porsche at the intro of the GT3 was asked that. They made the point that with the car GT3 being 30mm lower than the standard non PASM car, and with stiffer springs and shocks and roll bars, roll was so minimal that PDCC did not add anything and was not justifed or needed.

MASHAT

chuckbdc
____

Do you honestly think the PDCC matters? For instance my car is lowed 10mm(Spacers) and got the SPASM. do you think the PDCC do have major effects on rolling?

chuckbdc

I am certain it matters. I don't have PDCC and have driven with it just once on a test drive. I thought it had no roll at all.

I prefer the feel of SPASM, which has very low roll and a sort of feel I like.

Mike Levitas (engineer, owner of TCP, class winner at Daytona) described PDCC to me as being like having him optimizing the roll rate and contact patch on the fly at speed- which I thought was pretty neat. Porsche asserts that it is responsible for half the performance improvement around the 'Ring for the 991C2S over the 997C2S.

That Porsche has made other choices on the 991 GT3 - which is quite low and stiff- suggests to me that PDCC is made to add a very real performance improvement to its most street-comfortable configuration. That is the way it matters.

adamsclubs

Anyone compared body roll (or no roll) between PDCC and SPASM in C2S? Although not as hardcore as GT3, SPASM does drop 20mm and has stiffer suspension.

SkandoSchwabe

I have the SPASM and no PDCC on a C4S. The body roll is very minimal, progressive, and provides exactly the amount of "feel" I want during weight transfers while cornering. Getting PDCC AND SPASM does not seem to buy you very much if anything. So IMO, if you want a more convenient setup with higher ride height you may consider PDCC for track and highly spirited driving. If you get a Cayenne you should definitely get if. If you prefer the lower point of gravity and stiffer springs that come with the SPASM there is probably just a very small incremental reduction in body roll by adding PDCC. Having said all of this, I have not driven SPASM + PDCC, just PDCC no SPASM and SPASM no PDCC (sorrry for acronym heavy response )

Betternotbigger

Don't ignore the improvements to comfort. You get the best of both worlds. Particularly with the SPASM-equipped car.

ww007

I think you mean with a regular PASM equipped car. The SPASM would be stiffer so you wouldn't have as much comfort...

I think regular PASM + PDCC is probably best compromise between comfort and performance. If you're going to order the PDCC, I think you should choose SPASM only for the aesthetics of a lowered ride height, chin spoiler, and greater angle of spoiler deployment.

fbroen

My 2 cents after a year of SPASM with PDCC are:

The "feel" factor of the PDCC (good or bad) is probably the least noticeable in a SPASM car, where the PDCC has less to do in the first place, given the stiffer suspension / larger anti roll bar to begin with.

The ride in "eco" mode (read "normal" mode) is incredibly compliant even with SPASM. Metro roads in dire needs infrastructure dollars are of no worries.

With Sport Chassis on, the feel of the steering is more granular, and while I used to worry about the constant reviews of the electric steering, now I just shrug them off and smile behind the wheel at the precision.

Would I get PDCC again? Maybe/probably.

+ Pot hole mode changeable to very little body roll/performance mode is very cool, especially for someone who does not want to mod their car and just want it to be a factory setup jack of all trades (within reason, of course).

- Some level of purist in me is bugged by an extra system/weight of the PDCC.

Do I at all regret getting PDCC on my SPASM car. No.

chuckbdc

You have it all. Whats not to like?

adamsclubs

Good to know, I will likely use sport modes most of time, but pot holes will be a frequent encounter too. Luckily most of them have not developed to the point I think the chin spoiler will manage to stare right at them and live to tell the stories.

Cogito_Ergo_Zoom

If you're after ultimate performance and are the type that likes to have his cake and eat it, too? Yes, get PDCC. If you prefer the old school analog feel of a basic spring / shock / anti-roll bar suspension then, no, this is probably not for you.

Lateral load transfer is a bad thing. Period. PDCC's benefit is that it gives you the best of both worlds: dynamic lateral roll resistance, and thus a reduction in lateral load transfer, when you need it (during cornering), but no ride comfort penalty when you don't...the cake and eating it too part.

How one feels about the, er, feel of that is another thing. You may like the "feel" of a car rolling and loading up the outside wheels as you enter and progress through a corner, but strictly speaking it implies a concomitant unloading of the unladen, inside wheels and a reduction in car performance. This is not a good thing because in the process, even though you have increased the overall load on the outside tire and consequently its cornering force, you have reduced the overall combined cornering force of the given pair of tires (inside and outside). In plain English: you'll go faster with it.

This is basically "active suspension" technology and was taken to its extreme in early-to-mid 90s Formula 1 suspension design.

On that note, I'm surprised Porsche didn't include a PDCC option with a "track only mode" on the new GT3. Theoretically they could use GPS and a built-in track database to control a "pre-load" of roll resistance into the suspension to optimize cornering ability at various points on the track. This is what they were doing with F1 cars in the 90s, most successfully by Williams GPE.