skiahh

Oh, it's plenty. But max isn't until 1750ish. And it kind of goes against what you've heard/posted about moving the torque band up to 1700.

But I agree that these things have the roll on power of a vintage 80s diesel Mercedes 300E!

I will be interesting to eventually see a post tune dyno trace.

skiahh

Oh, and...

Attempting to corner with the lack of roll on acceleration? Woah.

Now, I realize this isn't a 911 or anything, but still. Brake before a corner, accelerate out of a corner, right? If I hit the gas at the apex, I'm already out of most corners before the power kicks me in the butt. So any sportiness of this thing has evaporated. Sea to Sky highway has lots of fun corners that are a tad scary in this configuration as you don't get the acceleration out and then you get the surge once you're straight again.

chsu74

I am talking about original tune and dyno which is posted. There is not a dyno graph on post tune and everyone's complaints follows a later powerband curve so not sure I am following.

skiahh

Oh, OK, I guess I was the one confused. I thought you were saying that was a post tune dyno!

RS-America

What I would like to see is a post 'fix' dyno graph of a diesel that has not been 'tuned'
Best of all worlds would be a pre and post 'fix' dyno graph from the same machine by the same people.
Sorry, but all my years doing test I like to see as much correlation of data as possible.
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https://rennlist.com/forums/cayenne-...meet-otis.html

BoersID

My wife drove the CD for the first time (her daily is an Audi S3 stock outside of summer wheels and tires) and her call to me about 100 miles into her 500 mile trip..."What did they do, this thing drives like crap now in traffic." She thought I was being picky. Porsche is adamant that the car is just fine and has their denial front dialed in. I have put on about 5K in the last two months and it progressively is getting more laggy again after the last parts swapping they performed at the Dealer.

Christobol

I saw someone say their CD doesn't lag from a standstill, that's definitely not the case with mine. I get the lag from a dead stop, and anytime I'm coasting and attempt to accelerate. This is dangerous, as someone else said, you have to time the boost when moving through congested traffic. It's also bad when turning onto a busy street you basically have a dead pedal so in an emergency situation you can't use the gas to help you avoid other moving obstacles.

Below you'll see the results of testing I've done both with the lag and the 0-60 times. The lag is consistently sitting around 1.6 - 1.7s. Then kind of surprising, but in retrospect makes complete sense, the 0 to 60 is about 1.6 to 1.7 seconds slower than when the car was released. I know the 0 to 60 times were not included in part of the settlement, but that difference is significant and it looks like it's completely caused by the lag.

Lag....... 0-60.... Temp...Humidity...... Engine Run Time
~1.9...... 9.1...... 95...... 75%............ 1 min
~1.9...... 9.2...... 95...... 75%............ 3 min
1.74...... 8.3...... 92...... 75%............ 45 min *slightly downhill
1.73...... 8.9...... 91...... 38%............ 1 min
1.59...... 8.8...... 83...... 38%............ 38 min *slightly downhill
1.73...... 8.8...... 92...... 29%............ 40 min
1.62...... 8.9...... 85...... 29%............ 5 min
1.69...... 8.5...... 78...... 31%............ 45 min

skiahh

Interesting. I do not have lag from a standstill. Have it bad with roll on power, but not in 100% of cases; sometimes the TC is locked up and I get normal response, but that is not the norm.

I would think you/we could make a case for reduced "driveability" if the 0-60 times are what you're seeing. They're somewhere between 13% and 20% using your numbers and the nominal 7.2 second 0-60 run.

Needsdecaf

Needsdecaf

hotrod2448

yrk928

I'll just leave this here for you guys to think about...
From my CT thread...
"Wow, looks like this is garnering a ton of interest! Rightfully so; I recently received a re-tuned TCM from Joe (yrktreg) and am stoked about the results.

I have a '13 Lux that felt neutered by the emissions modification. In trying to get it back to its original character, I ordered a European-spec TCM from ebay which did make some difference, but had a couple rough shifts and other issues that I wasn't totally happy with. When Joe started modifying the "fixed" US-spec modules, I figured I would try it out. The re-tune smoothed out a lot of the shifting issues and as far as I can tell, completely reverted the car back to the pre-emissions-fix behavior. Install was basically plug and play; I had to reset a few faults on the module and recode the hex key/workshop/importer/equipment numbers to my previous values in VCDS (I'm using 00B168; Cayenne map with gear shift display. It drives great!), plus the transmission 're-learn' procedure. I've had a few hundred miles of trouble-free driving so far! Great customer service and communication as well. Thanks again Yrktreg!"

"2014 R-Line here (750CF), and Joe's got her her groove back. I've been getting used to driving the post-fix programming and like a boiling frog, I hadn't realized in how many ways it was bad. The truck shifts much more enthusiastically again, doesn't rev the **** out of a cold engine (I got used to paddle-forcing upshifts when cold) and I have engine braking back!

But one thing that was unexpected were stops/starts. I take pride in being able to drive very intentionally and precisely and part of that is coming to a stop with no final jerk. After the fix, I found this almost impossible. I think this is due to the engine braking programming where it's disengaging the torque converter so there is no preload on the driveline, except if you try to feather the brake off as you come to a stop, it reengages the converter and the truck starts creeping forward. This is completely gone now, I can come to a buttery smooth stop again.

More specific comments about Joe, he's been a great help since I first started talking to him when this thread started and everything went as promised. Super easy transaction and many online sellers could learn a lesson from him in what is prompt communication. I am in Canada by the way, this added no extra hassle with the border."

Just two of many comments from people that have my TCM tune. But what do i know...

hotrod2448

I don't really get that last comment. I don't think anyone here has been overly negative towards anything you are saying. However when you are talking about potentially compromising a long time warranty on a vehicle where it's not uncommon for dealers to charge in excess of $300 for a basic oil change (imagine the premium for something that actually requires parts and work) I would hope you understand that people are probably going to want more than "I think", "shouldn't" and "probably" for answers when it comes to throwing tamper codes and what level of risk is involved in doing this.

I think a lot of us are interested in figuring out what it takes to get our CD driving right. To me it feels like the software for the fix was rushed and there are significant holes in both the engine and the trans tuning. I'm sure a lot of it is tuning to meet emissions but, some of it just seems like sloppy tuning.

For me the biggest issue I have is occasionally the engine will just not respond as expected to throttle input. I'm not talking about the engine trying to accelerate and being lugged by the trans not wanting to downshift (which does happen a lot) or revving higher than expected due to the converter not locking up. I'm saying there are times I hit the gas and absolutely nothing happens at all for close to 2 seconds. The engine will not even try to gain RPM so, I feed in more and more throttle over the 2 second dead zone and then it wakes up and is like "Oh, sorry I wasn't listening. You want 76% throttle? You got it! Hey TCU drops 4 cogs, ****s going down!"

This is by far the most annoying and problematic thing I have observed with my vehicle and it is not super repeatable. I have a feeling it is a hole in the map that needs a pretty specific set of circumstances to happen. On one hand I'm happy this issue is very infrequent because it would be hard to live with day in day out. On the other it makes it hard to demonstrate to the dealership and even more problematic is that it makes me a little bit hesitant pulling into traffic for fear that the vehicle might not accelerate.

Mostly I think I can live with the trans software but, it definitely could be better. I would be happy if it were more willing to downshift one or two gears when rolling into the throttle and not lug the engine so bad, which correct me if I'm wrong, it sounds like your file is going to be even more reluctant to downshift because it is for the pre-fix engine tuning and expects there to be more torque available down low than there is now. As it sits now it lugs, I give more throttle, it lugs, more throttle, it then downshifts multiple gears and shoots way up the tach. If it would have just shifted from 8th to 7th or 6th (as I do manually occasionally) when I rolled into the gas at 45MPH it could have avoided me requesting so much throttle.

Also, I'm assuming you would like to be compensated for this service at some point. What are you charging for this tune? You may already be aware but, most forums I've been on will want you to become a vendor if you are going to be selling services on their sites.

RomSL

hotrod2448