I figure I don't want to go tighter than .00275 at an absolute minimum on 2.750 mains, .0025 0n 2.375 rods, and I am nervous about being that tight. I only figure I could get away with it due to running my motor so warm. What hp level and rpm would also be a factor, in my case 880 hp at 7500 max rpm.
I don't think I am going to push it that tight on the mains, maybe .003 if the three sets of bearings I have will get me there. Rods, I won't go below .003 . What are your safe minimums?