I'm not trying to "steal" secrets or tricks, but just saying "I run it" is pretty meaningless if the associated bearing clearances are not included. Porsche and IRL cars run 0W-40, so I had references to begin with.
Let me rephrase my question as follows:
A generic car's owner's manual states the recommended oil for general use is 10W-30 or 10W-40. Said car is converted to an IT racer car with a 9/10th's build. Said engine will run 0W-40. During the engine overhaul should the owner stick to the tight side or loose side of the stock bearing clearances? How is the bearing clearance "sweet spot" determined?
I can provide some generic clearances for discussion purposes if they must be known before an answer can be given.
David Russell
IT Volvo 242
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