Też uważam, że to projekt godny uznania. Choć wydumka. Do tego powstała w celach komercyjnych
Ale rozmach i staranność budzą uznanie. Widać, że gość się zna na rzeczy.
Szczególnie polecam jego pouczające podsumowanie słabych punktów silników z serii M96/M97:
Cytuj:
All of the M96 and M97 engines (this includes 986,996,987,997) have the stupid IMS system which includes the rear IMS bearing which is the most commonly known fail point on the engines (although not the only flaw by any means). When/if this bearing fails before it is replaced, it almost always destroys the IMS shaft which requires a complete engine dis-assembly to repair. The difference in the newer versions, is that the IMS bearings are NOT removable without complete engine dis-assembly where as the earlier engines can be relatively easily retrofitted during a clutch replacement. It wasn't until 2009 that Porsche replaced the M97 engines with the 9A1 engines which do not have an IMS system. The 9A1 is very similar in design to the EZ Subaru flat six engines but are still too new for us to know if there are any significant design flaws like there were in the M96/97 engines. From what I understand, Porsche will be dropping the GT1 based engine that they have been using in the GT3's, 911 Turbo's, Cup Cars, and RSR's and will be running the 9A1 engine in everything eventually.
Other significant failure modes on the M96 engines (especially the early engines) include cylinder wall failure leading to D-chunks falling out of the casting, Air/oil separator system failures which can cause all sorts of internal damage, water pump failures, oil starvation during sustained cornering, and they have even been known to bend/break rods in stock form. None of these problems seem all that significant until you start shopping around for rebuilt engines or even shops that are capable to do the work. It's VERY easy to spend $10,000 just to rebuild an M96/97 engine not to mention the special tools required and special knowledge. The architecture of the engine is SO STUPID I can not even to begin to explain it. Stupid sub-assemblies inside the engine, over complicated chain drives related to the IMS system, heavy bulky components that seem to be overcomplicated for the sake of making things expensive to work on. It was as if Porsche NEVER intended for these engines to be rebuilt (evident by the fact that Porsche NEVER offered an IMS bearing replacement).
Sure the Subaru engines have their problems (rod bearings on the 2.0 motors and ring-lands on the 2.5's) but believe me when I tell you that these issues pale in comparison the the cluster F@&k that is the M96/97 engines. The problems associated with the EJ motors are easy to fix and more importantly, cheap to fix when compared to their Porsche counterparts.
(post #320, str 13)
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