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ficke ficke is offline
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Join Date: Nov 2004
Location: Tucson, Az.
Posts: 1,803
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There is no metal to metal contact on the bearing surfaces in normal operation , the crank rides on a film of oil, so the only sound diffrence would be what the oil might make Now I am not a porsche expert , but in my experinces with racing engines of other brands it is common to run losser tolarances on race engines than street virsions, My guess is the racing bearings or of
the same size but have diffrent qualitiys better suited for racing. Race engine have a very narrow ( and narrower the higher level of tune ) specific use and alot of their aspects I would not want in my hot rod street car.
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1978 Porsche 930
1968 Porsche 911S
1964 356C
Old 01-05-2005, 05:15 PM
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