I just wanted to get an idea the difference of refreshing rates between the loose engine and one built tight, as I too always wanted to build a loose engine that was juiced.
Gotcha. There are so many variables involved. But the things that I focus on are the rod/main bearing clearances, viscosity of the oil I'm using, and the estimated oil flow rate. I set my tolerances from there. The machining work + how those tolerances are set will determine how happy and long it'll live. I've had nitrous motors go 20,000+ before having to dig into them. Just can't get too crazy and lift a head. Very rarely is it the rotating assembly that dies unless you spin a bearing.