1. There is no such thing as false KR. KR is a retardation of timing based on noise being heard by the knock sensors. If noise is heard...it's not false. Just a personal pet peeve on the idea of false KR.
2. The types of things that can cause the knock sensors to report noise are loose brackets on the engine (like leaving a motor mount loose that injects off noise to the block). Predetonation is a big one. Using the right fuel, having the right tune etc.
You mention an issue about 60% throttle. Check plug gap, etc etc. It's either you needing a tune or something that isn't right in the whole combo. Thing really is.. once you start modding, it's all a big game of finding the perfect combo of what works best in your car.
