340 break in question
I'm not an expert by any means.
Then why are you talking????
Running the motor at 2-3k rpm under no load is not significantly different load-wise than at idle. And if anything the bearings should be seeing higher oil pressure at 2-3k and thus reducing the chance of metal to metal contact.
This shows your ignorance...
Rotating mass has intertia... Intertia is momentum... Momentum is equal to Mass * Velocity Squared... Or I = MV**2
Mass is directly proportional to the force, and velocity increases the force exponentially...
At 1000 RPM, your velocity squared is 1000 x 1000 = 1000,000
At 3000 RPM, velocity squared is 3000 x 3000 = 9000,000
9000,000/1000,000 = 9 times
So the momentum and forces go up 9 times at 3000 RPM as they are at 1000 RPM....
That said, 1000 RPM is not idle... Most street engines idle around 800 RPM... There will be good oil pressure at 1000 - 1200 RPM...