…definitely, a customer can´t expect that his 650hp tuned engine will last as long as the 420hp one…
nevertheless, Porsche parts, and I think everyone who´s into automotive engineering will agree, are probably the best one´s in terms of reliability even when used at the racetrack, sure we had the PCCB issue, but well…
so especially the engines and drive train parts are NOT sold at the peak of their potential, the have “quite some” potential left for some light modifications, nevertheless, PAG sent out “some” letter to “some” tuners because of the Cayenne – u know that there´re versions with 700hp and to say it, the 955 is NO sports car, so there were some major concerns on safety and reliability – I mean Porsche has to defend a reputation…
…to quickly answer your question nthfinity – you´re right, production nowadays is way more efficient, new production processes are introduced – there´re own departments only dealing with such issues – and especially quality in production and materials are better, Wiedeking launched a major quality project in 02 resulting in cars like the MkII GT2 ( 483hp std. ) with slightly over 500hp tested on the rig… 8)