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I’ve taken the BGB plunge to do a custom tune to get my Macan turbo running smoothly and will post full details when finished - but until then I thought id throw out the fact that v206 from Cobb is today out on the AP for those wanting to review it.

In doing all this I have a theory that for us turbo owners, the Cobb tune isn’t necessarily bad, but it might be the diverter valves - something that gets little press here so far.

So I’ll also start this thread to ask folks about an issue I believe I have relating to diverter valve leaks to see if others have seen this. Rather than try to describe it - I’ll post a link that shows it in all its ingloriousness below, albeit on a GTS.

https://youtu.be/w1XX5FTTgoo

Https://drive.google.com/file/d/1_AHoBxzDrwfOYngZplPGLa42Dz88eDsU/view?ups=drivesdk

Above is a link to my personal experience.



I believe mine are failing as I’ve experienced it more with every hope that the new Cobb map would fix the intermittent issues.

I did this video in seventh gear to show the boost dropping while the rpms stay steady/increase to show my foot is still on the throttle while not giving the PDK a gear to upshift into. Furthermore I believe that this happens in lower gears, but when it occurs, especially in the torquey turbos, the PDK interprets the torque drop as accelerator let off -meaning we are done trying to accelerate more aggressively and (erroneously) upshifts, especially in comfort mode which it probably does to get better gas mileage. If the boost then rebuilds or you apply more gas - the car gets confused at your intent and is what many turbo owners have complained about.

This boost drop still happens in sport mode under partial throttle around 2-3k rpms but the PDK is less eager to upshift so it’s currently less noticeable. It does NOT happen in WOT because the car is in lockdown mode where it interprets your input as “haul ass” and does so without intervention and sole goal to put the power down.

In light of this - I will have the diverter valves replaced ($600-$800 parts plus labor) and provide a before and after of both the Cobb OTS map and my custom tune (which currently does not exhibit the behavior and is the reason I sought it out) to hopefully give folks here the best advice on what to do if they experience the same.

As mentioned - I’m working with John at BGB on a custom tune - he has been phenomenal and worth every penny and my full review of this experience I’ll post once I’ve completed the process - but my guess is that part of the blame may fall on the diverters and more and more people may experience this with the higher boost levels of the Cobb tune.
 

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Does anyone know what's different with V.206?
I can't find any info on there site.
Same here --- no 206 info on Cobb's site - still says 205 is current version......

This is great news, cause I really want a smoother, more predictable response from my Macan Turbo...

- MO INFO PLEASE !~! :nerd:

.
 

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I’ve taken the BGB plunge to do a custom tune to get my Macan turbo running smoothly and will post full details when finished - but until then I thought id throw out the fact that v206 from Cobb is today out on the AP for those wanting to review it.

In doing all this I have a theory that for us turbo owners, the Cobb tune isn’t necessarily bad, but it might be the diverter valves - something that gets little press here so far.

So I’ll also start this thread to ask folks about an issue I believe I have relating to diverter valve leaks to see if others have seen this. Rather than try to describe it - I’ll post a link that shows it in all its ingloriousness below, albeit on a GTS.

https://youtu.be/w1XX5FTTgoo

Https://drive.google.com/file/d/1_AHoBxzDrwfOYngZplPGLa42Dz88eDsU/view?ups=drivesdk

Above is a link to my personal experience.



I believe mine are failing as I’ve experienced it more with every hope that the new Cobb map would fix the intermittent issues.

I did this video in seventh gear to show the boost dropping while the rpms stay steady/increase to show my foot is still on the throttle while not giving the PDK a gear to upshift into. Furthermore I believe that this happens in lower gears, but when it occurs, especially in the torquey turbos, the PDK interprets the torque drop as accelerator let off -meaning we are done trying to accelerate more aggressively and (erroneously) upshifts, especially in comfort mode which it probably does to get better gas mileage. If the boost then rebuilds or you apply more gas - the car gets confused at your intent and is what many turbo owners have complained about.

This boost drop still happens in sport mode under partial throttle around 2-3k rpms but the PDK is less eager to upshift so it’s currently less noticeable. It does NOT happen in WOT because the car is in lockdown mode where it interprets your input as “haul ass” and does so without intervention and sole goal to put the power down.

In light of this - I will have the diverter valves replaced ($600-$800 parts plus labor) and provide a before and after of both the Cobb OTS map and my custom tune (which currently does not exhibit the behavior and is the reason I sought it out) to hopefully give folks here the best advice on what to do if they experience the same.

As mentioned - I’m working with John at BGB on a custom tune - he has been phenomenal and worth every penny and my full review of this experience I’ll post once I’ve completed the process - but my guess is that part of the blame may fall on the diverters and more and more people may experience this with the higher boost levels of the Cobb tune.


Well this is ironic. I was just looking at diverter valves yesterday... but saw that the install was a PITA. I may call around to some tuning shops and get some quotes for install. I’ll play around tomorrow and see if my boost varies like the video, but I am 99% sure I’ve experienced this since day one.

Very intriguing.



Sent from my iPhone using Tapatalk
 

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UPDATE . . .

FIRST - - Thank You Ross, for starting this thread...


And now for the fun part --

SO - I decided to connected the AP to my computer, even though I couldn't find a v206-specific map file or revision info on the Cobb public site.

The AP Manager app immediately found a new Firmware version available as of yesterday (6-19-19), that specifically mentioned there were LOTS of new trim & sensor value updates that apply to all gen1 Macan models.

I let it update the AP's firmware and connected it to the car, to see if Firmware updates alone might change anything on the Macan even without a new map file...
SURE ENOUGH - this FW update DID load the v206 maps onto the AP itself !! :)

v206 is now installed successfully. I even reset the ECU learning state (.. no codes needed to be cleared ..)
Guess I'm playing 'early adopter' here, so I'll letcha know if there's any noticeable improvements.

Looking forward to my otherwise boring drive to work tomorrow ...

.
 

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Discussion Starter #10
I’ve taken the BGB plunge to do a custom tune to get my Macan turbo running smoothly and will post full details when finished - but until then I thought id throw out the fact that v206 from Cobb is today out on the AP for those wanting to review it.

In doing all this I have a theory that for us turbo owners, the Cobb tune isn’t necessarily bad, but it might be the diverter valves - something that gets little press here so far.

So I’ll also start this thread to ask folks about an issue I believe I have relating to diverter valve leaks to see if others have seen this. Rather than try to describe it - I’ll post a link that shows it in all its ingloriousness below, albeit on a GTS.

https://youtu.be/w1XX5FTTgoo

Https://drive.google.com/file/d/1_AHoBxzDrwfOYngZplPGLa42Dz88eDsU/view?ups=drivesdk

Above is a link to my personal experience.



I believe mine are failing as I’ve experienced it more with every hope that the new Cobb map would fix the intermittent issues.

I did this video in seventh gear to show the boost dropping while the rpms stay steady/increase to show my foot is still on the throttle while not giving the PDK a gear to upshift into. Furthermore I believe that this happens in lower gears, but when it occurs, especially in the torquey turbos, the PDK interprets the torque drop as accelerator let off -meaning we are done trying to accelerate more aggressively and (erroneously) upshifts, especially in comfort mode which it probably does to get better gas mileage. If the boost then rebuilds or you apply more gas - the car gets confused at your intent and is what many turbo owners have complained about.

This boost drop still happens in sport mode under partial throttle around 2-3k rpms but the PDK is less eager to upshift so it’s currently less noticeable. It does NOT happen in WOT because the car is in lockdown mode where it interprets your input as “haul ass” and does so without intervention and sole goal to put the power down.

In light of this - I will have the diverter valves replaced ($600-$800 parts plus labor) and provide a before and after of both the Cobb OTS map and my custom tune (which currently does not exhibit the behavior and is the reason I sought it out) to hopefully give folks here the best advice on what to do if they experience the same.

As mentioned - I’m working with John at BGB on a custom tune - he has been phenomenal and worth every penny and my full review of this experience I’ll post once I’ve completed the process - but my guess is that part of the blame may fall on the diverters and more and more people may experience this with the higher boost levels of the Cobb tune.


Well this is ironic. I was just looking at diverter valves yesterday... but saw that the install was a PITA. I may call around to some tuning shops and get some quotes for install. I’ll play around tomorrow and see if my boost varies like the video, but I am 99% sure I’ve experienced this since day one.

Very intriguing.



Sent from my iPhone using Tapatalk
Please post your quote. I’m guessing it’s going to be $300 for the valves (flat6) plus a couple hrs labor. I’ll post my actual costs when I can get it scheduled as well. My feeling is this will become a cost of running the Cobb or any higher boost tune for most Macan owners over time. My hope is this thread will get people out of the poor driving purgatory.
 

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UPDATE . . .

FIRST - - Thank You Ross, for starting this thread...


And now for the fun part --

SO - I decided to connected the AP to my computer, even though I couldn't find a v206-specific map file or revision info on the Cobb public site.

The AP Manager app immediately found a new Firmware version available as of yesterday (6-19-19), that specifically mentioned there were LOTS of new trim & sensor value updates that apply to all gen1 Macan models.

I let it update the AP's firmware and connected it to the car, to see if Firmware updates alone might change anything on the Macan even without a new map file...
SURE ENOUGH - this FW update DID load the v206 maps onto the AP itself !! :)

v206 is now installed successfully. I even reset the ECU learning state (.. no codes needed to be cleared ..)
Guess I'm playing 'early adopter' here, so I'll letcha know if there's any noticeable improvements.

Looking forward to my otherwise boring drive to work tomorrow ...

.


MUST. HAVE. FEEDBACK.




Sent from my iPhone using Tapatalk
 

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:nerd: I'm in.........>You've got my attention.

I just made a comment about the diverter valves when doing a tune on the Macan. I'm experiencing a similar thing with my GTS & Flat6 tune. As you stated, it's a non issue when wide open. I imagine the Turbo Macan will only amplify the diverter valve "leak" or "bypass" activity. I was not sure if this was a "Safety" feature or not avoiding having too much boost during certain situations controlled by the PC. Mine seems to do it more in Sport/sport plus mode when driving spirited and demanding boost at partial throttle. Will be interesting as to what you find.


Thank you for doing the comparison
 

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Discussion Starter #17
/forum/images/MacanForum/smilies/tango_face_glasses.png I'm in.........>You've got my attention.

I just made a comment about the diverter valves when doing a tune on the Macan. I'm experiencing a similar thing with my GTS & Flat6 tune. As you stated, it's a non issue when wide open. I imagine the Turbo Macan will only amplify the diverter valve "leak" or "bypass" activity. I was not sure if this was a "Safety" feature or not avoiding having too much boost during certain situations controlled by the PC. Mine seems to do it more in Sport/sport plus mode when driving spirited and demanding boost at partial throttle. Will be interesting as to what you find.


Thank you for doing the comparison
Yup. When I saw the video I started looking around online and apparently a lot of p-cars and Audi’s have issues with weak diverter when boost is turned up. I’m still trying to figure out the partial throttle issue where WOT doesn’t seem to have the issue.

I’m also going to see if John at BGB can explain what he is doing to fix the partial throttle issue (maybe limiting boost below 3k or something) because it does not happen with his custom map on my car and apparently others.

Ultimately I just want folks to know what they need to do to get their cars running smoothly with a Cobb tune - it seems especially as it relates to the Turbo models.
 

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Yup. When I saw the video I started looking around online and apparently a lot of p-cars and Audi’s have issues with weak diverter when boost is turned up. I’m still trying to figure out the partial throttle issue where WOT doesn’t seem to have the issue.

I’m also going to see if John at BGB can explain what he is doing to fix the partial throttle issue (maybe limiting boost below 3k or something) because it does not happen with his custom map on my car and apparently others.

Ultimately I just want folks to know what they need to do to get their cars running smoothly with a Cobb tune - it seems especially as it relates to the Turbo models.
I had something similar and the fix was to reset all the learning of the ecu. I think it is related to the fuel trim not being reset when you flash, so now the trim doesn't match with the new map...
before clearing the learning I had my boost jumping all around it was scary... and I didn't have a boost leak. It was also happening half throttle. WOT it was fine
 

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Yup. When I saw the video I started looking around online and apparently a lot of p-cars and Audi’s have issues with weak diverter when boost is turned up. I’m still trying to figure out the partial throttle issue where WOT doesn’t seem to have the issue.

I’m also going to see if John at BGB can explain what he is doing to fix the partial throttle issue (maybe limiting boost below 3k or something) because it does not happen with his custom map on my car and apparently others.

Ultimately I just want folks to know what they need to do to get their cars running smoothly with a Cobb tune - it seems especially as it relates to the Turbo models.


Isn’t the partial throttle issue due to a weak diverter spring and at partial throttle you have manifold vacuum pulling on the diverter diaphragm and then boost pushing at piston in the diverter which causes it to open? Under WOT there is a lot less vacuum so the spring holds because there is very little vacuum pulling at the diverter diaphragm?
 
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