Kinda correct, a bad tune will kill a motor at ANY power level Too much power will not kill a stock bottom end, too much torque would do it.. Bad batch will make a difference if its tuned right to the edge of detonation BEFORE the bad batch. Keep torque down (ie, power) coming on boost, avoid detonation/pinging especially at the region coming on boost, and dont load up the engine in a taller gear in a manual. Its been proven you can push HIGH RWKW out of these engines, but keeping a nice balance of midrange torque, and precice boost control And yeah, Don't bounce of rev limiter as that will hurt your pump.... and your pocket