Quote:
Originally Posted by r lane
So a billet crank would be considered of cast material. I think I remember that the early 911 cranks were not forged. An amazing video. Saw a similar set on forging the Fuchs wheel. My first thought while watching the heating and pounding, other than an environment where one could incur a life altering injury, was the constant maintenance that must be required for those types of equipment. I had heard, true or not I don't know, that the later G bodied cars, 88 and 89 I suppose, had alignment issues. Due I was told to worn out chassis jigs at the factory and Porsche was reluctant to retool due to that car coming to the end of its run. I appreciate the feedback. Bob
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A billet crank would be a crank whittled (machined) from a solid ingot of usually 4130 or 4340 chromoly steel.
All early Porsche 911 cranks were forged. There was/is an unsubstantiated rumor that non-counter weighted 2.0/2.2 cranks weren't forged but I believe they were.