nberry:
I believe you are making too much of the warranty issue. Porsche's promotional video (in this thread) for the 991GT3 shows it on the track and talks in terms of improving a drivers performances in tenths of a second. If this is not an indication it is track car then I don't know what is.
Porsche has always had the warranty language disclaimer. Yet, if breakdown occurs without evidence of abuse I doubt very much that Porsche will not honor the repair. On that I have no doubt because I know of several instances where breakdown occurred related to track work and Porsche made the necessary repairs.
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Regarding the warranty, it would be best to leave the topic to those who actually know what they are talking about, i.e. (i) understand the contract with Porsche and (ii) have practical, direct experience of warranty issues with their cars.
On the practical, direct experience of warranty issues because of track use, this deserves a specific topic on this forum. Is there any such topic on the forum?
Regarding the warranty, one must check the sale documentation, which includes the owners’ manual. The US/CAN 997.2 GT3 owner’s manual clearly states a warranty disclaimer in case of track use. The best is to quote directly from this manual.
Use of the car on a track is addressed in the following sections of the owners’ manual: Page 4, under the caption “Safety notes”, page 5 under “Development philosophy” and page 6 under “Service brake” and “Aerodynamic components”.
Page 4 provides the greatest level of detail of the various warnings about track use and its consequences on warranties. It begins with following paragraph:
“Your vehicle warranty does not cover use in competition, racing or track use or other events. Components and/or parts that fail during racing or driving events (including Porsche sponsored events) will not be covered by the manufacturer new car limited warranty or the pre-owned vehicle warranty.”
It does not say that the disclaimer applies to all circumstances, but only if the failure happens during the racing or [track] driving event.
Later on on same page it is stated:
“Please bear in mind that use on race tracks subjects all vehicle components to considerably more wear than normal use, making professional inspection and maintenance after each use a vital precondition for functioning and safety”.
It means that in case of a failure, the owner will probably have to show Porsche that he complied with this condition and had his car professionally inspected after each track event.
Page 4 ends with the following paragraph:
“Note again that in no case will Porsche warrant any parts damaged while racing your vehicle, on or off the track.”
While we deducted from the first paragraph on page 4 that track use impacted the warranty only if failure happens during the event, the closing paragraph of page 4 challenges this conclusion. It seems limited to racing the car, while the generic exclusion pertains to any use, racing or not, on a track.
Page 5 starts with the following paragraph:
“Porsche 911 GT3 stands for a sports car with exceptional performance, both on the road and on the race track.”
This dispels any doubt of those who wondered whether the car could be used on a track. Of course it can, but there are consequences.
Page 6, about brakes, starts with the following:
“Both the standard brake system with composite brake discs and the Porsche Ceramic Composite Brake (PCCB) are high-performance brake systems, designed specifically for driving on race circuits.”
Page 6 also adds the following regarding brakes:
“The values communicated by Porsche are based on normal operation adapted to traffic. Wear increases considerably when the vehicle is driven on race tracks or through an aggressive driving style. Please consult an authorized Porsche dealer about the current guidelines in effect before such use of your vehicle.
Brake wear expectations are based on normal operations in street traffic. Wear increases considerably when the vehicle is driven on race tracks or with an aggressive driving style. Wear will also increase considerably if the brakes are not warmed up before being raced.”
CONCLUSION
All of the warning comments in the owners’ manual about track use are common sense and I suppose anyone attending a track session, especially with a Porsche club, will be made aware of the relevant precautions and recommendations.
The only point worth noting is the impact on the warranty. It is clear that if a breakdown happens during a track session, even if it is not a race, the warranty disclaimer applies.
What is not clear to me is if the disclaimer is applicable when the component breakdown can be traced to a track use, but occurs after a track session.
In any event, with the PDK it will be harder to break components especially the engine as it can no longer be over-revved on downshifts (and is protected, as in the past, by the limiter on upshifts).
Comments welcome. 
I am sure you do the right thing, Nick- every sportscar afficionado has to enjoy one of these beasts at least once in a lifetime.
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This is nonsense and I hope you know it.
: Porsche 997 GT3 Arctic/Black
