Ive pulled tons of timing timing from the upper rpms as well as tried running different afr's but im positive its just noisy lifters/valvetrain. I have a very conservative map (no more than 6* above 5k and around 10.0afr) with low boost and this problem still persist. I wouldn't want to even try to turn the knock sensor off because it DOES serve a very important purpose like sam said. But the cool thing is i can control exactly how sensitive the sensor is at different points so you could see it as a bandaid fix but it works and it still detects real knock.
