had a big block with .003.7 on the mains and.004. on the rods had good oil psi cold and would hold oil psi but was a bit low. but it went to 8000 rpms all the time with a 70 +pound crank. never got supper psi hot. but it would build oil psi at rpms and the rods and mains look good so that 10 pounds for every 1000 rpm .is BS