This is 911-related but I thought I'd share some pictures.

I have been having the privilege of helping Jay Koehler rebuild some 911 engines. He did my 2.7 for the six last winter. We recently did a 2.7 and a 3.0, both fairly stock. Now he is redoing his 3.7 for his IMSA GTU vintage race car, which he drove 24 hours at Daytona years ago.

I recently saw on this board a discussion about a knife edge crank. Now I've seen one. Here is the custom made one going in the race car:

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He had the bearings coated to reduce friction.

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Crank added.

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The crank is made out of a piece of solid steel. Note how the edges where it rides on the bearings are "rounded" for strength. To fit, the bearings have to be similarly rounded.

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And this is the car it is going in.

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Sixes are beautiful engines.

what stroke is it ? good times hanging the in the know guys
supertech super crank,66mm for 3.0 and up cases is similar.. he had run made @ $3500 each

What stroke? I'd say right hand.... and a tissue