How many 15-16 gt3's have engine replaced?
10-02-2016, 04:53 PM
#1817
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10-02-2016, 04:59 PM
#1818
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I have been watching and re-reading this thread for a while, as I am hoping to jump in, soon. This info is disconcerting. Nonetheless, I have faith the Porsche will fix this problem, (or Jamie is going to make a killing!) Still, there is the possibility of a class action suit, like with the 996 IMS issue, and no one really won. Can't help but compare this to my beloved 996. I have driven her for 12 years and no issues, simply bulletproof. Fingers crossed that Porsche takes care of "it."
10-02-2016, 05:05 PM
#1819
Drifting
10-02-2016, 05:16 PM
#1820
Addict
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I know I sound like a broken record but the RS revs to 8600-8700, other than 1st gear. On the track in sport auto you'll see on the data traces the max shift point for 3,4,5,6 etc is around 8675. The 8800 was a marketing fallacy created to make the reduction from the originally planned 9000 on the RS sound less significant. For the R it's 8600 and for the 991.2 GT3 I will not be surprised if it's 8500 like the cup engine....
10-02-2016, 05:41 PM
#1821
Rennlist Member
Thanks Grant.
One of the biggest surprises for me in this whole story is how Porache have muscled the motor writers into not questioning the fact they have been producing now two generations of cars (991 GT3RS and 911R) which do not hit their headline rev limits in other than one single (unused on the track or spirited driving) gear. In some cases we are talking a 200 rpm difference on an already reduced rpm limit from original conception (RS).
It baffles me that the world motoring press have not taken Porsche to task on this question and garnered a response that may have indeed given us more clarity to the situation PAg are facing with the MA17X engines.
The obvoously couldnt back down form the 9000 rpm limit in the 991.1 GT3 as they hadd already delivered those cars and made the limit a key USP for this car. To have downgraded the limit would have caused them much legal and image headaches.
But I still cant understand why folks at EVO and other magazines havent called foul on this and directed the question back to why Porsche have taken this stance. Obviously there is a relationship "in the industry" that us schmucks dont see - i.e. "dont P*ss off Porsche or you wont get preference/invite next new release"?
One of the biggest surprises for me in this whole story is how Porache have muscled the motor writers into not questioning the fact they have been producing now two generations of cars (991 GT3RS and 911R) which do not hit their headline rev limits in other than one single (unused on the track or spirited driving) gear. In some cases we are talking a 200 rpm difference on an already reduced rpm limit from original conception (RS).
It baffles me that the world motoring press have not taken Porsche to task on this question and garnered a response that may have indeed given us more clarity to the situation PAg are facing with the MA17X engines.
The obvoously couldnt back down form the 9000 rpm limit in the 991.1 GT3 as they hadd already delivered those cars and made the limit a key USP for this car. To have downgraded the limit would have caused them much legal and image headaches.
But I still cant understand why folks at EVO and other magazines havent called foul on this and directed the question back to why Porsche have taken this stance. Obviously there is a relationship "in the industry" that us schmucks dont see - i.e. "dont P*ss off Porsche or you wont get preference/invite next new release"?
10-02-2016, 05:46 PM
#1822
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Location: The way to hell is paved by good intentions “Wenn ich Purist höre...entsichere ich meinen Browning” "Myths are fuel for marketing (and nowadays for flippers too,,,)" time to time is not sufficient to be a saint, you must be also an Hero
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Damn Ferrari...
10-02-2016, 06:38 PM
#1824
Rennlist Member
Some information here from another poster on the new 991.2 GT3 Cup engine.
Unfortunately auto translate isnt perfect.
All I can really conclude is there is a n new cam profile which lowers the max rpm of the engine (and also the power from the 4.0RS variant). They have compensated with some additional toque (20nm)
Interestingly they make note of the DLC followers. I get the impression the new less aggressive cam lobe profile mated to a DLC coating (not clearly stated) may be an enhancement in durability. Essentially this is what we have in the 911R engine which takes the RS 4.0 and reduced max rpm to 8500 with possibly a different cam profile.
Other changes appear to be a cylinder boor hardening process (assumes less friction for more power and ring longevity), and improved lubrication at the crankshaft (this may indeed be teh same crank and scrubber as used in the GT3/RS/R but its new to Cup terminology).
So still leaning some facts form the new Cup engine to see if there are significant changes that may translate into road production GT3 in 5 months time at Geneva...
https://chromjuwelen.com/de/network/...he-911-gt3-cup
Unfortunately auto translate isnt perfect.
All I can really conclude is there is a n new cam profile which lowers the max rpm of the engine (and also the power from the 4.0RS variant). They have compensated with some additional toque (20nm)
Interestingly they make note of the DLC followers. I get the impression the new less aggressive cam lobe profile mated to a DLC coating (not clearly stated) may be an enhancement in durability. Essentially this is what we have in the 911R engine which takes the RS 4.0 and reduced max rpm to 8500 with possibly a different cam profile.
Other changes appear to be a cylinder boor hardening process (assumes less friction for more power and ring longevity), and improved lubrication at the crankshaft (this may indeed be teh same crank and scrubber as used in the GT3/RS/R but its new to Cup terminology).
So still leaning some facts form the new Cup engine to see if there are significant changes that may translate into road production GT3 in 5 months time at Geneva...
https://chromjuwelen.com/de/network/...he-911-gt3-cup
10-02-2016, 06:56 PM
#1825
Nordschleife Master
It's unfortunate IMO that Porsche had to reduce max RPMs in order to gain reliability. There have been a few engines throughout history that were revving to 9K,Porsche is not the first one. Once they have gone down this path combined with all the marketing followed,it kind of paints the wrong image turning back the volume. It's mind blowing for an engineering company to have not done all the necessary testing before hand. I personally prefer a reliable engine over 500 RPMs,but I remember back all the marketing about those last 500...
10-02-2016, 07:18 PM
#1827
Rennlist Member
Thx for all you contributions.
Cheers
10-02-2016, 07:35 PM
#1828
Rennlist Member
Please forgive my lack of understanding in some of the areas in this thread and it is also my first post in Rennlist. My 2016 GT3 was built 9/15 and the 10th digit of my VIN does show a G. After reading the thread I am trying to learn a little more so, where do I find the engine serial number? Thanks in advance.
