I can't believe I have to elaborate further. You have uploaded no log file, your description of the problem is vague at best, your changes that you've made are wrong or at the very least have zero to do with predet. Again, flash the car back to stock before you blow the engine. Mind you the ecu can pull 12.5* of ignition timing, full advancement at full load on most of these engines are about 17-19*. If your engine is actually knocking at 6.5* advancement you have huge issues. Considering how naive you are, I would flash the car back to stock and seek local help to solve your issue, OR at the very least upload a fucking log file. Making changes without is fucking stupid and you will end up blowing your engine.