anything you do beyond what you have already done is going to void the warranty.

they aren't retarded. you can tell when rings are fried from meth injection, or a piston is busted because of a bad nitrous shot. the best you could hope for is a spun bearing, but even then, they would try to argue that you were abusing it because it was fine for the first XXX number of miles and obviously the oil pump is pumping just fine.

Not sure why you would be attempting to squeeze every little bit out of a crate engine that you want to keep the warranty for anyway.
if you want power, then rebuild your own engine, with quality parts and make it however you want it.