Engine's Knocking....

[1slowdsm]

Sorry. I didnt know where I should put this thread. So I just threw it on here.
The last time I was a the track a few weeks ago I have my logger logging my runs. I set an alarm to beep when I went over 21 counts of knock. And it would just keep beeping throughout most of 3rd gear and this is on only 13 psi. I have stock fuel, turbo-back system, intake, boost controller. I dont know if its really knock since I was running pretty much stock or just a bad sensor. I have the logger readings, but I dont know too much about it. And I cant find anything else abnormal when there's knock, like a sudden increase/decrease of something. Should I be worried about it with the stock fuel? I've also heard that it could just be the lifters setting off the knock sensor.