Knocking

[ahh 33 s2]

hey i noticed last time i went down the drag strip about 3 or so weeks ago that on my pfc hand controller that my engine was knocking...

now i dont no if there is a safe level or not its not huge i dont think it goes past the first little marker if you are only diplaying knock level on it but when i put the foot down and it get up to 4500 and high it starts to be noticeable...

can some one let me now if this is ok or if i should start saving