Oil level and rpm

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What happens at high rpm with an overfilled engine?

Do you get froth from the crankshaft churning the oil?

Or do you get extra protection from having extra oil since , supposedly, high rpm operation places alot of the oil in the top of the moteur.




My neighbor said they kept losing motors because the sump was so small that when they put the hammer down the bottom end starved, as far as I remember.
 
Depends.

Some engines have pumped a good portion of the oil out of the pan into the heads, so nothing happens. Others may beat the oil with the crank.

The Duratec 2.5L V6 was notorious for spun bearings if you had a low oil level and took sweeping RH turns at high RPMs. The heads/block lacked sufficient drain holes to get the oil back to the pan. The combination of low oil level, the g forces on the oil in the pan, and the lack of sufficient drain could result in a crank starved for oil.

The solution for many was to run an extra quart in the crankcase to reduce the chances of oil starvation during high g right hand turns at speed.
 
Corvette recommends you add a quart to the engine before a track event ... that that would be 1 quart over full. Then drain it back down to the full mark after you get back home. They don't want the sump to run low at continuous high RPM.
 
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