I ran this oiling mod on a 460 BBF that was in a drag car. The engine ended up throwing a rod but the interesting thing was that the damage to the crank was limited only to the journal where the rod failed. Even with the loss of oil pressure in the system the bypass line kept oil to the rear of the crank. It demonstrated how the bypass line helped even the oiling out from front to rear. On the down side, I reckon we would have picked up the failed rod earlier if the bypass wasn't there - we would have seen the drop in oil pressure. The bypass line effectively masks an oil pressure drop because it plumbs into the back of the motor right at the point where the pressure sender is.
