hard or soft copper line for a valley oil gallery bypass line?

Newbomb Turk said
Ok, **** it. Forget about all that you explain how the crossover does anything and don’t try to bullshit me that it slows the oil down because it damn sure doesn’t.

If the pressure is the same the oil velocity will be the same.

Next thing you’ll want me to think is an high volume pump will suck the pan dry. That’s as true as the crossover does anything.
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When you push the brake pedal on your car, after the pads hit the rotor you have pressure, but no flow because it’s a sealed system. An engine is not totally sealed. Because it is not sealed and the leaks are not uniformly distributed you can have lots of flow(velocity) in some areas and very little in others.