Are there differences between 991 PDK & 997.2 PDK?
#31
Former Vendor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Lots of posts on guys who "test drove" 991s. And comparing the shifts. I still have my 09spdk and 991spdk i live with them i know, i track, i drive the hell out of my cars. You guys prob had a salesmen right seat you dont do what i do. Theres a significant difference in the pdk. its ok if you dont want to upgrade or cant justify the bucks but please, because you did a 15 min test doesnt make you an expert. This is why i barely use the forum. Too many know it alls and posers.
#33
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
reading these post sometimes its funny how it turn out to be. scott complained then thanks everyone and now says there is a difference and claims others as know it alls. its a forum brothers everyone can share hteir opinions.
funny how things turn out..
nevertheless i would like to share my experience with our brothers. have a sports chrono 997.2 pdk. driven the 991pdk on track and on roads. there is a difference of course. as with the new car come new upgrades. more responsive, those wonderful blips on downshifts on the track..of course that wonderful sound inside the car can influence the subjective assessment of the whole thing. i would say that the PDK on the 991 has improved but not to say that the 997.2pdk is obsolete. and i would hope that the difference between the 2 could be closer if only PORSCHE would realease a similar software upgrade to the 997.2 pdk. i would venture a guess that the technology is the same with the two pdk's with some materials differences to account for the weight and the biggest change would be the software controlling the clutches and the engine dme. would think that if the software of the 991 was placed in the 997.2 control unit both would work same way.
funny how things turn out..
nevertheless i would like to share my experience with our brothers. have a sports chrono 997.2 pdk. driven the 991pdk on track and on roads. there is a difference of course. as with the new car come new upgrades. more responsive, those wonderful blips on downshifts on the track..of course that wonderful sound inside the car can influence the subjective assessment of the whole thing. i would say that the PDK on the 991 has improved but not to say that the 997.2pdk is obsolete. and i would hope that the difference between the 2 could be closer if only PORSCHE would realease a similar software upgrade to the 997.2 pdk. i would venture a guess that the technology is the same with the two pdk's with some materials differences to account for the weight and the biggest change would be the software controlling the clutches and the engine dme. would think that if the software of the 991 was placed in the 997.2 control unit both would work same way.
#34
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
would think that some of the transmission covers now used magnesium instead of aluminum or other materials improvements. i guess one to the things porsche said to its engineers when devloping the new car is really loose weight. i think the tech on both cars are still very much similar like the dfi and pdk however the refinements like start stop, heat management, pdk software, etc create fuel economy and better efficiency.
#35
Nordschleife Master
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
#38
Nordschleife Master
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Lots of posts on guys who "test drove" 991s. And comparing the shifts. I still have my 09spdk and 991spdk i live with them i know, i track, i drive the hell out of my cars. You guys prob had a salesmen right seat you dont do what i do. Theres a significant difference in the pdk. its ok if you dont want to upgrade or cant justify the bucks but please, because you did a 15 min test doesnt make you an expert. This is why i barely use the forum. Too many know it alls and posers.
test drive and owning the vehicle is two totally different things, 16,000 miles in a 997.2 and 2000 in 10 days in 991... is a very good reference on whats what..
#39
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Also, I can imagine that Software changes would definitely improve shifting, based on more data gathered over the 997 PDK lifetime, so 991 could potentially have a better software... for some reason though, Porsche doesn't proactively update old Porsche software, kind of softly pushing buyers to new models for improvements... I totally hate their business practice... on my Audi, I had my ECU re-flashed a couple of times (once by dealer, once upon request) and it definitely improved engine performance and fuel consumption (adjusted how turbos engage, as well as A/F ratio).
#40
Nordschleife Master
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
How do they do that? Re-flash the software? Can someone request a new software? From what I've seen, the answer is no, unless you have a real problem.
Also, I can imagine that Software changes would definitely improve shifting, based on more data gathered over the 997 PDK lifetime, so 991 could potentially have a better software... for some reason though, Porsche doesn't proactively update old Porsche software, kind of softly pushing buyers to new models for improvements... I totally hate their business practice... on my Audi, I had my ECU re-flashed a couple of times (once by dealer, once upon request) and it definitely improved engine performance and fuel consumption (adjusted how turbos engage, as well as A/F ratio).
Also, I can imagine that Software changes would definitely improve shifting, based on more data gathered over the 997 PDK lifetime, so 991 could potentially have a better software... for some reason though, Porsche doesn't proactively update old Porsche software, kind of softly pushing buyers to new models for improvements... I totally hate their business practice... on my Audi, I had my ECU re-flashed a couple of times (once by dealer, once upon request) and it definitely improved engine performance and fuel consumption (adjusted how turbos engage, as well as A/F ratio).
#41
Rennlist Member
Join Date: Mar 2007
Location: West Los Angeles & Truckee, CA
Posts: 4,018
Received 864 Likes
on
590 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by Scott997:9525065
Lots of posts on guys who "test drove" 991s. And comparing the shifts. I still have my 09spdk and 991spdk i live with them i know, i track, i drive the hell out of my cars. You guys prob had a salesmen right seat you dont do what i do. Theres a significant difference in the pdk. its ok if you dont want to upgrade or cant justify the bucks but please, because you did a 15 min test doesnt make you an expert. This is why i barely use the forum. Too many know it alls and posers.
#42
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I cannot stress enough how much the change in the pdk is night and day. I have a 997.2S PDK and 991s PDK. The 997 pdk transmission and I don't want to upset anyone is made completely obsolete in comparison. It like the difference between a 360 ferrari and 458 if you have had the pleasure of driving those. The 991 pdk is revolutionary. Makes the 997pdk feel more then 1 generation apart. this is not a joke, im very serious. haters can say what they want. I have both and know the truth!!!
PTL..
I've arranged to have my 997.2 crushed and melted.... I don't want that POC to contaminate the 991's on the road...
We both know the truth...
#43
Racer
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Good morning all. Just joined.
Own 997 3.6l Turbo manual (my seventh 911). but all bought second-hand (I am not a millionaire
)
I read with great interest the various contributions to this topic.
I have very limited experience of PDK, as all my cars were manual. But I drove a 991 for three days (rented it, actually, because I wanted to be quiet, no salesman...), and yesterday, I test drove a 997 3.8L Turbo with PDK.
And either I was in a bad mood, or... there is quite a difference between the two PDKs. The 997 I found jerkier and slower, even in super sport. And I remember loving the downshift "blip" with the 991.
trouble is: I can't afford the 991 Turbo
of course, and I wonder whether changing my 2007 480bhp 997TT for the 3.8l 500bhp with "that" PDK is maybe a stupid idea... alternative: getting a 991S, but losing 80bhp does NOT appeal.
Any comments, anyone...? Thanks, and have a good week end.
Own 997 3.6l Turbo manual (my seventh 911). but all bought second-hand (I am not a millionaire
![Roll Eyes (Sarcastic)](https://rennlist.com/forums/images/smilies/rolleyes.gif)
I read with great interest the various contributions to this topic.
I have very limited experience of PDK, as all my cars were manual. But I drove a 991 for three days (rented it, actually, because I wanted to be quiet, no salesman...), and yesterday, I test drove a 997 3.8L Turbo with PDK.
And either I was in a bad mood, or... there is quite a difference between the two PDKs. The 997 I found jerkier and slower, even in super sport. And I remember loving the downshift "blip" with the 991.
trouble is: I can't afford the 991 Turbo
![Mad](https://rennlist.com/forums/images/smilies/mad.gif)
Any comments, anyone...? Thanks, and have a good week end.
Last edited by JeanLouis33; 09-28-2013 at 07:14 AM.
#44
Racer
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Funnily enough, I went about it the wrong way round... starting with the 991.
I am/was an unconditional "manual gearbox" man. After a three days rental of a 991S PDK, I had to admit "I could get used to this". I liked it.
Yesterday, I test drove a 997 Turbo 3.8L PDK and I was SOOO disappointed... even in SuperSport, the feel is different, it is jerky especially from 1st to 2nd, not as fast as I remember the 991...
All in all, I must recognize that a very significant progress was made between 997 and 991...
...which does not help me, because I have a 480bhp 997, and I don't want a 400bhp 991S, and I can't afford a 991 turbo !!
#45
Racer
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Don't know whether it is just the programming, or technical changes, but there is "feelable" difference, I'm sure.