991.2 COBB tune - Impressions and Dyno
10-22-2019, 06:53 PM
#331
Burning Brakes
Don't apologize, it needed it!
1.) It doesn't suck the file out and send back a new file as much as it writes to certain tables in the file. Installing their Stage 0 map is essentially flashing the stock tables back in; uninstalling the Accessport entirely returns the car 100% back to stock and unmarries the AP from the car. It does not modify the write counters or the program dates, as you are not programming the ECU, just editing tables.
2.) On the .1 and the .2 you don't but as you go more aggressive with the tunes, should this be a a track car, it will generate less heat on track with a higher flowing exhaust. Intercoolers are only required if you're going more aggressive with the tuning OR if you live in a part of the world where intake air temps are egregious like they are here in Florida.
3.) You can run off the shelf maps or have a pro tuner modify the maps for different applications. For example, i have made several tunes for .2 owners that go on track in the summer and the winter so we have varyling levels of aggression as well as tunes for different rated octane fuel. If you want more information you can always call the shop and ask for Wray!
John
1.) It doesn't suck the file out and send back a new file as much as it writes to certain tables in the file. Installing their Stage 0 map is essentially flashing the stock tables back in; uninstalling the Accessport entirely returns the car 100% back to stock and unmarries the AP from the car. It does not modify the write counters or the program dates, as you are not programming the ECU, just editing tables.
2.) On the .1 and the .2 you don't but as you go more aggressive with the tunes, should this be a a track car, it will generate less heat on track with a higher flowing exhaust. Intercoolers are only required if you're going more aggressive with the tuning OR if you live in a part of the world where intake air temps are egregious like they are here in Florida.
3.) You can run off the shelf maps or have a pro tuner modify the maps for different applications. For example, i have made several tunes for .2 owners that go on track in the summer and the winter so we have varyling levels of aggression as well as tunes for different rated octane fuel. If you want more information you can always call the shop and ask for Wray!
John
Last edited by jkautz; 10-22-2019 at 08:44 PM.
10-23-2019, 08:23 AM
#334
Rennlist Member
80-90 hp seems about right with maps 102 or 103. Looking at more recent logs, the revised cobb maps are dialed down quite a bit, maybe 7-8 less pounds of boost. Also the torque limits are down about 100 ft-lb. I wouldnt expect anywhere near these gains on the new maps, but the cars seem much happier (less overboost, less timing pull). I would be shocked if theyre more than a 50-60 whp gain now.
10-23-2019, 11:25 AM
#335
Burning Brakes
10-23-2019, 09:27 PM
#336
Advanced
Does anyone have the maps or a link to the v105 maps? I asked Cobb to post these maps and they’ve been in no rush to get these posted, probably for the torque and power has dropped significantly albeit the car is very happy with v105.
10-24-2019, 07:33 AM
#337
Former Vendor
Directly from Cobb's 'Map Notes'...
Revision Notes:
V105 - Updated maps for better load control and shifting performanceV104 - Updated maps to fix DTC issues.
V103 - Minor Map Updates
V102 - Bug fix for Lambda tables in previous map versions. Added Stage2 OTS maps for all Carrera models
V101 - Updated maps to pick up back end software improvements.
V100 - Initial Release Calibration. Adjusted ignition timing, airflow limits, throttle limits, and fuel as well as other tables that help maintain drivability and increase performance all while maintaining reliability.
11-22-2019, 09:27 PM
#338
Advanced
As expected based on driving impressions, the latest v105 / v106 map from Cobb is a significant reduction in both torque and HP from previous map versions but the power delivery is smooth and linear - very impressive considering it’s not a custom tune. V105 is still a huge increase over the stock performance. The link below shows the peak gains, max gains, and the charts.
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
11-22-2019, 09:38 PM
#339
RL Community Team
Rennlist Member
Rennlist Member
As expected based on driving impressions, the latest v105 / v106 map from Cobb is a significant reduction in both torque and HP from previous map versions but the power delivery is smooth and linear - very impressive considering it’s not a custom tune. V105 is still a huge increase over the stock performance. The link below shows the peak gains, max gains, and the charts.
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
Last edited by Carlo_Carrera; 11-22-2019 at 10:47 PM.
11-23-2019, 08:34 AM
#340
Three Wheelin'
I can tell you first hand from dyno testing and dozens of pulls using a Dragy that the overall performance from the latest maps is lower than the original maps. Boost has been lowered and overall torque and HP numbers are down as a result. However, by doing this, Cobb has eliminated the problems some were having with improper shifting and jumpy acceleration. As others have said, the power/acceleration is more linear and smoother overall with no hesitation or clunkiness in the shifting.
Clearly the cars computer didnt play well with over-boosting to the levels the original maps had set.
Clearly the cars computer didnt play well with over-boosting to the levels the original maps had set.
11-23-2019, 10:18 AM
#341
RL Community Team
Rennlist Member
Rennlist Member
I can tell you first hand from dyno testing and dozens of pulls using a Dragy that the overall performance from the latest maps is lower than the original maps. Boost has been lowered and overall torque and HP numbers are down as a result. However, by doing this, Cobb has eliminated the problems some were having with improper shifting and jumpy acceleration. As others have said, the power/acceleration is more linear and smoother overall with no hesitation or clunkiness in the shifting.
Clearly the cars computer didnt play well with over-boosting to the levels the original maps had set.
Clearly the cars computer didnt play well with over-boosting to the levels the original maps had set.
11-23-2019, 10:48 AM
#342
Three Wheelin'
I dont have the numbers in front of me, but I was running 0-60 in 3.0 and now I am running at 3.2. Based on the dragy numbers it was dialed down something like 7-8% from the original "hot" map.
I also have a pro tune but, the pro tunes are based on the Cobb Factory maps and then altered for your specific car. Cobb dialed down a lot of different tables in addition to the boost, so it isnt
easy to get the pro tune to squeeze out every ounce of tq/hp because certain tables (and there are hundreds of them) were dialed back in the new maps.
Dont get me wrong, my pro tune got a significant increase over the stock stage 2 Map, but it isnt as aggressive as the pro tune I got based on the original stock maps.
BUT, and a big BUT here... My original pro tune based on the original stock map was having all sorts of shifting issues and stuttering so, I guess I cant have my cake and eat it too..
I also have a pro tune but, the pro tunes are based on the Cobb Factory maps and then altered for your specific car. Cobb dialed down a lot of different tables in addition to the boost, so it isnt
easy to get the pro tune to squeeze out every ounce of tq/hp because certain tables (and there are hundreds of them) were dialed back in the new maps.
Dont get me wrong, my pro tune got a significant increase over the stock stage 2 Map, but it isnt as aggressive as the pro tune I got based on the original stock maps.
BUT, and a big BUT here... My original pro tune based on the original stock map was having all sorts of shifting issues and stuttering so, I guess I cant have my cake and eat it too..
11-23-2019, 10:56 AM
#343
Advanced
Original charts with torque and HP gains over stock are here:
https://www.cobbtuning.com/products/...-carrera-s-gts
v105 / v106 charts with torque and HP gains over stock are here, posted by Cobb on 10/31/19:
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
https://www.cobbtuning.com/products/...-carrera-s-gts
v105 / v106 charts with torque and HP gains over stock are here, posted by Cobb on 10/31/19:
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
11-23-2019, 11:25 AM
#344
Three Wheelin'
Based on my GTS from the original maps to the new map, the HP is down 8% which is about what I figured.
If you gained 8hp from a tune it would be pretty good, so to lose 8hp from one map to another is pretty significant.
Not happy about the tune being neutered but, if it cant drive well then it isnt worth sh..t anyway, so I guess they did what they had to do,
My car was spot on perfect with a pro tune on the original maps, but just wouldnt shift from 3rd to 4th or was it 4th to 5th?
In any case, it wouldnt shift out of just one gear. If I was able to tweak just that one shift point the car would have been a monster..
If you gained 8hp from a tune it would be pretty good, so to lose 8hp from one map to another is pretty significant.
Not happy about the tune being neutered but, if it cant drive well then it isnt worth sh..t anyway, so I guess they did what they had to do,
My car was spot on perfect with a pro tune on the original maps, but just wouldnt shift from 3rd to 4th or was it 4th to 5th?
In any case, it wouldnt shift out of just one gear. If I was able to tweak just that one shift point the car would have been a monster..
11-23-2019, 11:29 AM
#345
RL Community Team
Rennlist Member
Rennlist Member
Original charts with torque and HP gains over stock are here:
https://www.cobbtuning.com/products/...-carrera-s-gts
v105 / v106 charts with torque and HP gains over stock are here, posted by Cobb on 10/31/19:
https://cobbtuning.atlassian.net/wik...rera+Map+Notes
https://www.cobbtuning.com/products/...-carrera-s-gts
v105 / v106 charts with torque and HP gains over stock are here, posted by Cobb on 10/31/19:
https://cobbtuning.atlassian.net/wik...rera+Map+Notes