Quote:
Originally Posted by southernstar
Jake, if I am reading you correctly you are suggesting that the IMS is a good idea if properly executed - i.e., with proper bearings/bearing lubrication.
Brad
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Nothing wrong with the design- everything wrong with the factory M96 bearing design.
I have an 88 Carrera with damn near 300K miles on the original engine and I am not alone. Until Porsche went to the ball bearing there have never been issues! The 547 4 Cam Carrera (Fuhrmann) engine utilized a layshaft in the mid 1950s and that also had no issues.
The difference? The Mezger and Fuhrmann engines are supported by PLAIN bearings with pressure fed oil delivery.
Omit the "IMS" and speed up the surface speeds of the drive chains and see what happens. Makes sense? No to me.