Turning a 340 crank, How much is to much?

perfacar said

hi, they will run and last at .030 or .040 under.some motors have a smaller dia bearings and run just fine.one of the tricks, was to turn chev crank rod journals to 1.88 which is honda size. smaller dia has less bearing speed therfore less friction =more power. just food for thought.BTW, my stick car is at .020 under, hhmmmm

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The guy @ the machine shop I use drilled the .010/.010std and .020/.020 auto in my head. He builds mostly drag motors. Other machine shops have told me that he was being to particular (Anal) and I would be absolutly fine turning them as much as .030/.030 or even more They even made referance to the chevy cranks w/ honda rods.