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Deadspool
Newbie


Joined: 19 Oct 2018
Posts: 3



PostPosted: Fri Oct 19, 2018 11:08 pm    Post subject: 991.1 Turbo S boost pressure only 0.6 bar at WOT Reply with quote

Hi All. I recently purchased a 991.1 Turbo S (a late 2013 model) Hi All. I recently purchased a 991.1 Turbo S (a late 2013 model with only 11,000 miles on the clock).

I wanted to ask what it the boost pressure when WOT? 9 times out of 10 I only see a maximum of 0.6 bar of boost when WOT in all three modes - normal, sport and sport + modes. That's 0.6 bar of boost when WOT throughout the rev range (most of the pulls I have done are from 3500RPM all the way to the red line in 3rd, 4th and 5th gears). Sometimes my turbo boost reading is displayed in orange which indicates the over boost function is activated but the boost doesn't surpass 0.5 bar of boost for the whole duration that I am WOT whilst it is orange.

The very few times that I have seen 1.0-1.2 bar of boost is from low speeds the majority of the time when in 1st and 2nd gear. But 9 times out of 10 I don't get past 0.6 bar of boost and the car feels much slower than when it slingshots forward at 1-1.2 bar. I have probably launched the car 30 times in a couple of weeks. I have a Dragy device and the best 62-124MPH (100-200KMH) time I can get is only 8.5 seconds.

As I understand I should experience between 0.9-1.0 bar of boost throughout the rev range.

Do I have a turbo boost issue? Any ideas what it could be?

Thank you in advance.
 
  
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911TEL
Barcelona


Joined: 29 Oct 2007
Posts: 1411
Location: Inverness & Kazakhstan

2011 Porsche 997 Turbo S

PostPosted: Sat Oct 20, 2018 5:20 am    Post subject: Reply with quote

Is it really April the 1st already ??

What can I say .....

Pop Corn
_________________
997 Gen 2 Turbo S Basalt Black -BBS CHR, Kline inconel exhaust, DSC V1 & Polished Bliss air freshener...
Cayenne S diesel 850 N/ m torque!!!! Jet black
SL 55 AMG Obsidian Black
Brompton S2L Black edition
 
  
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maph
Monza


Joined: 01 Feb 2017
Posts: 151



PostPosted: Sat Oct 20, 2018 8:23 am    Post subject: Re: 991.1 Turbo S boost pressure only 0.6 bar at WOT Reply with quote

Deadspool wrote:


Do I have a turbo boost issue? Any ideas what it could be?



Yes you do. Not sure what the 100-200kmph should be on a standard car but I would have thought sub 7 and you should be getting 1.2 WOT.

I would guess either an actuator rod on the turbo is partially seized (at 13k miles from lack of use) or you could have an air leak somewhere.
_________________
2012 997.2 Turbo S
 
  
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Deadspool
Newbie


Joined: 19 Oct 2018
Posts: 3



PostPosted: Thu Oct 25, 2018 12:14 pm    Post subject: Reply with quote

911TEL wrote:
Is it really April the 1st already ??

What can I say .....

Pop Corn


What do you mean lol?
 
  
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Deadspool
Newbie


Joined: 19 Oct 2018
Posts: 3



PostPosted: Thu Oct 25, 2018 12:16 pm    Post subject: Re: 991.1 Turbo S boost pressure only 0.6 bar at WOT Reply with quote

maph wrote:
Deadspool wrote:


Do I have a turbo boost issue? Any ideas what it could be?



Yes you do. Not sure what the 100-200kmph should be on a standard car but I would have thought sub 7 and you should be getting 1.2 WOT.

I would guess either an actuator rod on the turbo is partially seized (at 13k miles from lack of use) or you could have an air leak somewhere.


You are correct! Just got a call from my local OPC to say that they have completed their diagnostics and have ordered a replacement turbo actuator which should resolve my boost issue 😁. Thank you for all of your help.
 
  
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