991 GT3 Concerned Owners Group
05-18-2017, 11:42 AM
#256
Race Director
Thread Starter
How do you know that? Your finger followers might already be worn and you didn't have the right conditions to turn that into a CEL?
Without removing the cylinder head you can't know.
The whole point about this big fuzz is the uncertainty between wear and CEL. We know that you need very high rpms to trigger the CEL, but very little information is available as to whether the wear needs very high rpms or not.
Without removing the cylinder head you can't know.
The whole point about this big fuzz is the uncertainty between wear and CEL. We know that you need very high rpms to trigger the CEL, but very little information is available as to whether the wear needs very high rpms or not.
05-18-2017, 02:20 PM
#257
Burning Brakes
How do you know that? Your finger followers might already be worn and you didn't have the right conditions to turn that into a CEL?
Without removing the cylinder head you can't know.
The whole point about this big fuzz is the uncertainty between wear and CEL. We know that you need very high rpms to trigger the CEL, but very little information is available as to whether the wear needs very high rpms or not.
Without removing the cylinder head you can't know.
The whole point about this big fuzz is the uncertainty between wear and CEL. We know that you need very high rpms to trigger the CEL, but very little information is available as to whether the wear needs very high rpms or not.
05-18-2017, 02:25 PM
#258
Race Director
Thread Starter
05-18-2017, 02:33 PM
#259
Burning Brakes
05-20-2017, 08:39 AM
#260
Three Wheelin'
After reading the thread is it correct to say that the wear issue has to do with manufacturing tolerances? In some cars there seems more space for oil to do its work while in others the space is just too tight and that keeps lubrication away. Am I correct?
Now, are the manufacturing tolerances a fabrication issue or a design issue? Did Porsche designed tolerances which are too tight?
My guess is that tolerances were designed within thousands of a millimeter and in some cases they just happen to result in too tight an engine. If the tolerances were too tight for all cars then all motorsshould fail at about the same time. That is not happening.
Not just mental jousting, I guess learning why could help us all.
Now, are the manufacturing tolerances a fabrication issue or a design issue? Did Porsche designed tolerances which are too tight?
My guess is that tolerances were designed within thousands of a millimeter and in some cases they just happen to result in too tight an engine. If the tolerances were too tight for all cars then all motorsshould fail at about the same time. That is not happening.
Not just mental jousting, I guess learning why could help us all.
05-20-2017, 09:20 AM
#261
Nordschleife Master
After reading the thread is it correct to say that the wear issue has to do with manufacturing tolerances? In some cars there seems more space for oil to do its work while in others the space is just too tight and that keeps lubrication away. Am I correct?
Now, are the manufacturing tolerances a fabrication issue or a design issue? Did Porsche designed tolerances which are too tight?
My guess is that tolerances were designed within thousands of a millimeter and in some cases they just happen to result in too tight an engine. If the tolerances were too tight for all cars then all motorsshould fail at about the same time. That is not happening.
Not just mental jousting, I guess learning why could help us all.
Now, are the manufacturing tolerances a fabrication issue or a design issue? Did Porsche designed tolerances which are too tight?
My guess is that tolerances were designed within thousands of a millimeter and in some cases they just happen to result in too tight an engine. If the tolerances were too tight for all cars then all motorsshould fail at about the same time. That is not happening.
Not just mental jousting, I guess learning why could help us all.
05-20-2017, 10:24 AM
#262
Addict
Rennlist
Lifetime Member
Rennlist
Lifetime Member
TT
05-20-2017, 11:18 AM
#263
Race Director
Thread Starter
I have spoken with people intimate with the engine design who assure me almost every engine will suffer the same fate. I personally feel the verdict is still out, as too many cars have been tracked and driven hard, and are holding up well.
That is why a meeting with Porsche was requested. We need more information.
That is why a meeting with Porsche was requested. We need more information.
05-21-2017, 09:36 AM
#264
Nordschleife Master
I have spoken with people intimate with the engine design who assure me almost every engine will suffer the same fate. I personally feel the verdict is still out, as too many cars have been tracked and driven hard, and are holding up well.
That is why a meeting with Porsche was requested. We need more information.
That is why a meeting with Porsche was requested. We need more information.
05-21-2017, 12:22 PM
#265
Race Director
Thread Starter
05-23-2017, 11:01 AM
#267
Race Director
Thread Starter
05-23-2017, 12:12 PM
#268
Nordschleife Master
05-27-2017, 08:09 PM
#269
My solution was the same -- sold for approx. 5k under MSRP. LOOKING FORWARD TO THE 991.2 Motorsport Model.
