Porsche was leaving power on the table all along (991.2)(Headers)
10-10-2018 | 07:47 PM
#1
Thread Starter
Banned
Joined: Aug 2018
Posts: 1,824
Likes: 171
Porsche was leaving power on the table all along (991.2)(Headers)
Interesting tidbit from this Car and Driver article on the new 992 discussing engine/turbo changes and improvements.
I'm very interested to see their design!
A little more:
Link to article: https://www.caranddriver.com/reviews...11-992-preview
To improve exhaust flow, the stamped-steel manifolds in the 991.2 have been replaced by cast-iron headers. These are said to weigh no more, but flow better, than their double-walled predecessors.
A little more:
The base Carrera will retain the same turbochargers as the 991.2, with a 49-millimeter compressor and a 45-mm turbine wheel. But the Carrera S will get the 55-/48-mm unit used today in the Carrera GTS. The 992 engines also get piezo fuel injectors, which are more expensive than the mechanical direct injectors but provide more precise control of the injection quantity.
These changes have allowed an increase in compression ratio from 10.0:1 to 10.5:1, which pays dividends in both power and efficiency. The 992 Carrera S output increases from 420 to 450 horsepower, without any change in today’s 16.0-psi boost pressure. (That's the same output that today's GTS produces with 18.1 psi.) Expect another 30 ponies or so in the new GTS. The base Carrera, however, gets a smaller bump, from 370 to 385 horsepower, with unspecified reduction in boost pressure from 13.1 psi in the 991.
These changes have allowed an increase in compression ratio from 10.0:1 to 10.5:1, which pays dividends in both power and efficiency. The 992 Carrera S output increases from 420 to 450 horsepower, without any change in today’s 16.0-psi boost pressure. (That's the same output that today's GTS produces with 18.1 psi.) Expect another 30 ponies or so in the new GTS. The base Carrera, however, gets a smaller bump, from 370 to 385 horsepower, with unspecified reduction in boost pressure from 13.1 psi in the 991.
10-10-2018 | 07:50 PM
#2
Thread Starter
Banned
Joined: Aug 2018
Posts: 1,824
Likes: 171
Also
Those dang sons o' bitches. 991.2 guys stuck with inferior parts.
Tweaked Turbo Engines
Although all-new turbocharged engines were introduced on the 991.2 models only three years ago, Porsche engineers found several areas to improve for the 992. First, the 992 gets a bigger central intercooler at the rear, replacing the pair located in the rear fenders of the 991.2. This 12-percent-larger intercooler gets direct airflow from the base of the wing, has improved internal airflow, and achieves a greater reduction in intake-air temperature. The intercooler air still exhausts in the lower rear fenders, now in nicely split vents.
10-10-2018 | 08:19 PM
#3
Rennlist Member
Joined: Jul 2001
Posts: 12,535
Likes: 3,462
From: Marineland FL
Everything can and will be improved upon over time - the 991.2 GTS is a great car and I am glad I ordered one in the Targa variant with a manual. I would have waited a long time for that in the 992! And I do not like the exhaust in the bumper and squared off hood edges, nor what I envision the dash/console to be.
By the way, there is a 992 Forum, where this would be more appropriate although 991.2 is in the title line so it was a sneaky way to get away with it. I hope the 991 and 992 threads don't start merging though as other 992 threads are starting to pop up here as well - is there a Moderator in the house?
By the way, there is a 992 Forum, where this would be more appropriate although 991.2 is in the title line so it was a sneaky way to get away with it. I hope the 991 and 992 threads don't start merging though as other 992 threads are starting to pop up here as well - is there a Moderator in the house?
10-10-2018 | 08:25 PM
#5
Thread Starter
Banned
Joined: Aug 2018
Posts: 1,824
Likes: 171
I'm not sure if you've been paying attention but there's been heavy debate and others going back and forth about the 991.2 stock and aftermarket header design. This is why it was posted here. This has nothing to do with the 992's squared design and what not. This topic is about 9A2 engine used in the 991.2 and 992. There's no need to call the hall monitors.
I am 991.2 GTS owner whose into aftermarket parts and tuning. There's lots to be learned. Knowledge is power.
I am 991.2 GTS owner whose into aftermarket parts and tuning. There's lots to be learned. Knowledge is power.
10-10-2018 | 08:45 PM
#7
Rennlist Member
Joined: Jul 2001
Posts: 12,535
Likes: 3,462
From: Marineland FL
I'm not sure if you've been paying attention but there's been heavy debate and others going back and forth about the 991.2 stock and aftermarket header design. This is why it was posted here. This has nothing to do with the 992's squared design and what not. This topic is about 9A2 engine used in the 991.2 and 992. There's no need to call the hall monitors.
I am 991.2 GTS owner whose into aftermarket parts and tuning. There's lots to be learned. Knowledge is power.
I am 991.2 GTS owner whose into aftermarket parts and tuning. There's lots to be learned. Knowledge is power.
Trending Topics
10-10-2018 | 09:11 PM
#8
Thread Starter
Banned
Joined: Aug 2018
Posts: 1,824
Likes: 171
If one wants to do a search on a topic they should do a forum wide search instead of a single section like say: 991.
There's been many times I wanted to search a topic but it was never found in the 991 section but it was found in the 991 Turbo section or 991 GT3 section. If I ran a forum wide search for my 991 topic it would cover all three 991 sections instead of one. This forum has it's flaws.
If someone makes a thread topic that says "Will 992 headers fit on my 991.2"? in the 991 section. Are you gonna be upset?
10-10-2018 | 09:28 PM
#10
Rennlist Member
Joined: Jun 2014
Posts: 1,067
Likes: 155
10-10-2018 | 09:41 PM
#11
Rennlist Member
Joined: Aug 2002
Posts: 1,125
Likes: 288
From: Northern NJ
I am sure there still will be aftermarket options for the 992. Take off headers may be available.
10-11-2018 | 03:25 AM
#15
Rennlist Member
Joined: Aug 2017
Posts: 2,425
Likes: 1,296