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Question for 991.2 owners that have installed the Cobb tune

 
Old 06-08-2019, 02:10 AM
  #31  
991.2GTS
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So I have put in new fuel and seems the same. I have looked at the datalog again and I saw that over 6100rpm the torque reduction request is on. Is what circumstance the torque reduction request will trigger?

Thanks
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Old 06-08-2019, 03:01 AM
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Originally Posted by 991.2GTS View Post
So I have put in new fuel and seems the same. I have looked at the datalog again and I saw that over 6100rpm the torque reduction request is on. Is what circumstance the torque reduction request will trigger?

Thanks
I would go to a Cobb pro tune.

The torque limit allowed is much higher for a stage 1 tune than stock.
Your stage 2 tune torque limit should be slightly higher than a stage 2 tune ( I have not checked this).
A pro tune could possibly increase this further.

Bad gas would effect timing and reduce power which would decrease your torque actual and prevent you from hitting the torque limit ( yea???) by slowing you down.
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Old 06-08-2019, 04:02 AM
  #33  
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Originally Posted by 991.2GTS View Post
So I have put in new fuel and seems the same. I have looked at the datalog again and I saw that over 6100rpm the torque reduction request is on. Is what circumstance the torque reduction request will trigger?

Thanks
Are you seeing the timing retard and boost reduction? Also, different gas station?
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Old 06-08-2019, 08:00 AM
  #34  
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What did cobb say about the logs? Just curious, although i doubt insight will go beyond the comprehensive analyses above. If this was my car, I would have a shop check the turbos and for exhaust/manifold leaks and if hardware is ok do a protune. I have been told if the engine was knocking alot it will throw a CEL. There also appears to be a need for a TCU tune. Is it possible some of this is TCU intervention?
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Old 06-08-2019, 10:20 AM
  #35  
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Originally Posted by 991.2GTS View Post
So I have put in new fuel and seems the same. I have looked at the datalog again and I saw that over 6100rpm the torque reduction request is on. Is what circumstance the torque reduction request will trigger?

Thanks
Since working fine at stage 0 I still think it is being choked. Need better air filter, and upgraded intercoolers.
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Old 06-08-2019, 05:15 PM
  #36  
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Originally Posted by 991.2GTS View Post
So I have put in new fuel and seems the same. I have looked at the datalog again and I saw that over 6100rpm the torque reduction request is on. Is what circumstance the torque reduction request will trigger?

Thanks
I'll log my car on stage 1 and stage 0 tonight and report results.
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Old 06-09-2019, 03:11 AM
  #37  
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I will upload my datalog again tomorrow. Today I went to track with the stage 2 map. After couple sessions (3rd gear after 6000rpm still struggle), my ecu seemed like reset the stage 2 and back to stage 0 (the boost gauge not getting over 15-17 psi) and the power was linear like stock. After I cool down my car after couple hours and it was the same, the power is exactly like stock (linear with boost arond 14-15 psi). I think I may just uninstall it and sell it.
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Old 06-09-2019, 02:36 PM
  #38  
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Originally Posted by 991.2GTS View Post
I will upload my datalog again tomorrow. Today I went to track with the stage 2 map. After couple sessions (3rd gear after 6000rpm still struggle), my ecu seemed like reset the stage 2 and back to stage 0 (the boost gauge not getting over 15-17 psi) and the power was linear like stock. After I cool down my car after couple hours and it was the same, the power is exactly like stock (linear with boost arond 14-15 psi). I think I may just uninstall it and sell it.
Based on your previous datalogs, if it isn't a gas quality issue, you have some mechanical issue. All the ecu is doing is detecting tons of knock and retarding the timing and boost to save the engine. The question is, why is it detecting tons of knock?
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Old 06-09-2019, 05:00 PM
  #39  
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So this is my datalog from last night. Pretty obvious is in some kind of limp mode or stock map.
Attached Files
File Type: csv
datalog21.csv (66.9 KB, 16 views)
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Old 06-09-2019, 08:31 PM
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Originally Posted by 991.2GTS View Post
So this is my datalog from last night. Pretty obvious is in some kind of limp mode or stock map.
It looks like stock map boost levels. It's still pulling tons of timing because it's detecting a ton of knock. As it seems you eliminated fuel quality as the issue, it leads me to believe there's some issue with the install of your exhaust components which is leading to the detected knock.


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Old 06-12-2019, 09:40 PM
  #41  
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Originally Posted by Cheshi143 View Post
I'll log my car on stage 1 and stage 0 tonight and report results.
Did you end up doing the datalog?
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Old 06-13-2019, 01:21 AM
  #42  
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Originally Posted by 991.2GTS View Post
Did you end up doing the datalog?
Rain prevented it. I'll need to try again this weekend.
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Old 06-14-2019, 11:54 PM
  #43  
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So this is the error code I got. Maybe is related? I see some post from before that the Cobb tune leads to some pdk error code
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Old 06-15-2019, 12:11 AM
  #44  
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Originally Posted by 991.2GTS View Post
So this is the error code I got. Maybe is related? I see some post from before that the Cobb tune leads to some pdk error code
No, unrelated to all the knock you're getting. Unless there's something inside the transmission rattling around like a can full of nuts and bolts.
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Old 06-15-2019, 02:19 PM
  #45  
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To continue to beat a dead horse, if you go on track with stage 2 and you haven’t changed air filter and you intercoolers you get way too hot air into your engine.
I would make these changes before scrapping the COBB.



“I ride my horse and whip my porsche”
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