Originally Posted by Robdokwon

Driving experience: I followed the directions to wait a min or so and then started the car drove away right after the install was done. The engine "rough" feeling and sounding for a few minutes - as if you got a new exhaust and there was some odd vibrations on revs over 4k. I was told by Cobb rep this would happen and not to worry it would go away after a few minutes and a few miles driven - it totally did. It was gone before I noticed again. Whew.

So far my only small issue is that there is now a slight delay when you press the pedal down hard before the boost comes on and the car flies ahead, like, duh, it actually has turbos now. But again, Base owners never had any lag really, so it's a bit more boy-racer-ish now. Nice that with the COBB AP you can always uninstall if you want.

Originally Posted by Bob Z.

High-flow cats provide a big benefit, which I failed to mention - they reduced the tiny bit of lag even before I added the tune to my GTS.

Originally Posted by Robdokwon

COVID -19 Perspective Disclaimer: Posting this below as a positive form of distraction in these very difficult times we are all in. We all have more pressing concerns so this stuff while trivial is also just the right thing to keep us hoping for sunnier days. With that said:

My review of recent Cobb AP do-it-yourself download for 17' 991.2 Base w/ PDK. Loaded the Off-the-Shelf Stage 1 93.

Order experience: very easy online, simple location on website and add-to-cart was a breeze. I also called Cobb and s/w sales agent and got some answers to a few questions I had, being nervous about an expensive DIY software product that purportedly turns your base Carrera into a S or GTS on power and speed. Polite and knowledgeable, they were ready for my FAQs. Took about 6 days to arrive at the door. UPS required signature - did not like that because if I wasn't home and missed it I would've been upset.

Delivery experience: Packaged well, the quality of the AP itself and the cords are high and add confidence that this product is sophisticated. The instruction booklet is excellent and truly set forth in a brief and efficient way. Could it really be that simple? Yes, read on.

Install experience: I followed Cobb's sales agent's advice to connect a 20 amp battery charger minutes before installing the AP to the car. That was easy and reassuring - zero issues. With the battery charge level hovering consistently at 13.2 V I went ahead with the AP install. The plug connects easily to the AP and easily to the purple female connector on my car's ECU under the driver's side dash - stupidly simple. I followed the directions on the AP screen (tells you to switch the key to the on (but not running) position and from there it prompts you with a few more easy to follow steps and then commences the download, showing a % status bar along the way. ***Note, during this time, all the dash warning lights are going on and off and all sorts of failure messages are popping up and going away in the message dash cluster screen - this is normal Cobb assured and natural part of the ECU reflash. Don't panic here. It took about 15 minutes or so to complete successfully. Says that when you are done. The possessed dash lights all resolved and back to normal state. I unplugged everything and put the AP away.

Driving experience: I followed the directions to wait a min or so and then started the car drove away right after the install was done. The engine "rough" feeling and sounding for a few minutes - as if you got a new exhaust and there was some odd vibrations on revs over 4k. I was told by Cobb rep this would happen and not to worry it would go away after a few minutes and a few miles driven - it totally did. It was gone before I noticed again. Whew.

I let the engine warm nicely by driving slow around town for a few min until the oil temp was up past the blue zone (as I always do), then I started to dip my foot in the throttle a bit, first in normal mode. Right away, I noticed that I suddenly had more wind-up torque even at partial throttle. The car surged forward in a faster way than stock with the same throttle press distance. Nice. Cobb AP noticed! I began to press harder and harder, feeling how the PDK now interacted with the new higher boost level. Was it still linear? Yes, but. But what? It's a little different now, hard to put a finger on it though, I'm still processing this in my head and will update further when I drive more. For now, my initial impression is that you now notice that your car has turbos, for real. S and GTS cars always had a bit of lag before the heavy power delivery and now so does the Base. Although not as fast, the beauty of the Base Carrera was it's awesome linear power delivery with perfectly calibrated PDK rhythms. It's no longer as silky smooth now with Stage 1 93 running. But it is very noticeably faster now - the car has been transformed to a more frenetic and fast machine, delivering the feel in your hands and butt that the car has serious boost thrust now. And your speedo quickly shows speeds way faster than you used to be at at the same throttle input in the same gear. You're flying now. From a launch at the light perspective, the car is a rocket now, even partial throttle pull-away is amusing as you leave the cars behind in the dust, literally. The traction control intervention is more there now than stock - actually I barely ever noticed any TC when stock. I then drove in Sport mode for a while and the car is a certified animal. PDK and more boost and it's a ball of fun. A whole different car now, my brakes are now working ever harder as I'm asking more from them from all the throttle and speed fun.

So far my only small issue is that there is now a slight delay when you press the pedal down hard before the boost comes on and the car flies ahead, like, duh, it actually has turbos now. But again, Base owners never had any lag really, so it's a bit more boy-racer-ish now. Nice that with the COBB AP you can always uninstall if you want.

Do you stage 2 on the BASE? no way. no need. if you still need more power (in your head), turn off your TC once to invoke sport PSM or off completely - good luck, you'll realize how much power you always had. Stage 1 is perfect for Base owners. I'll update more as I go.

Originally Posted by damien996

Here’s my results. I went from a Cobb stage 2 to a pro tune 400hp and 460 ft-lbs torque on a dynojet. I have a BMC air filter and Soul sport cats on my 991.2 T.

Originally Posted by thesaintusa

Picked up 26 hp and 52 lb/-ft, over OTS stage 2?

991.2 T with filter and headers?

Nice

Notice any difference in driveability? Does it seem 'smoother'?

Originally Posted by damien996

BMC filter and Soul Sport Cats, not headers. It still has the same characteristics as when it was stock but it pushes (pulls) really hard. I could tell a huge difference in toque and first gear is more immediate as a result of the custom tune. First gear was another priority for me, I felt like the Cobb tune v105 / v106 maps were really neutered compared to the v104 map.