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Thanks. Not sure I can handle (psychologically) Nascar parts in my 911, but you guys know what you're doing.
Meanwhile, I spoke with the machine shop. I'm going to go ahead and mention the name because these guys seem to have an excellent reputation as well. It's Ollie's in Havasu AZ. I'm not criticizing or disputing anything about their work - I just want to understand why they did what they did. According to George, at the shop, they've been grinding 911 rod journals .001" undersize, to run with STD bearings, in high performance engines for the last 25 years.
They believe the life of the crank is improved due to better oil flow from the greater clearance, with less chance of spun bearings. If this is a proven fix for a slightly worn crank - and indeed an improvement, as Ollies claims, I'm puzzled by why it isn't well known and mentioned in the excellent books on Porsche engine building.
-Paul
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