Aasco flywheel is here.

[Jake Raby]

First off, prevuious 911 engines had forged steel cranks, not cranks made of sintered material... I have only seen one 911 crank, two 914 cranks and two 356 cranks break in all my days with aircooled Porsches. NOTHING with this engine and the prior 911 or other Porsche engines is the same. The vintage Porsche engine was not designed to have a dual mass arrangement and the design is what is creating some of these issues coupled to the cheap ass materials used in modern engines.

The cranks in early engines were extremely strong and wll over built for the application, never confuse anything that the Porsche engine of yesterday and the Porsche engine of today may have in common. The only thing they have in common is being 6 cylinders and horizontally opposed-

Aasoco and other providers do not build engines and until our program came along not many people had ever torn into or rebuilt these engines. When a crank would break people would just discount it as an extreme case and would never even consider the flywheel as a source, until it happened twice to the same person.

Lots of components are manufactured without the manufacturer having direct interaction with the entire engine as a primary objective, so they may never see the things that their component actually does..