Originally Posted by MasterKwan
I just think oil is collecting in that head and normal engine pumping from the pistons is pushing it out through the vent line. High G's in a corner is like tilting the engine over. It prevents gravity from letting the oil drain back into the pan. I'll bet your valve cover fills with oil in those corners.
I agree. Which is why you should always run a little more oil for road race and an accusump IMO