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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
Posts: 21,260
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Extra RPM creates more crankcase pressure. Also race engines are typically 'looser' with more blowby. However, you should not collect alot of oil if it is set up properly.
When I had new engine fill the catch every run group, I spent many track days trying to debug the oil system, when the real answer was revealed by doing a leak-down test. Cracked rings and scored cylinders in my case.
Stock engine? Stock oil tank? Have you done a leak-down test?
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