How do you know? If it has enough pump volume the pressure shouldn't suffer much. And then its usually at idle. That factory Ford crank probably looks like spaghetti noodle under heavy power. It been proven many times. Clearance is clearance. If there's lack of lube or flex, parts touch. Then the bad stuff starts. Open the clearance until they don't touch. Provide enough clean oil to keep them separated. That's the bottom line.
Doug
Heh there's a limit... I didn't bother checking that main clearance but it's gotta be huge... it vibrates horribly at 4k+... enough to warrant pulling the motor
