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what brand and octane rating of gas are you using? Also, try the 91 CAI tune, some people also notice less knock using the 91 tune over the 93. You wont notice any performance difference either.
 

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have a catch can and use only BP 93 ALL THE TIME...did some more logging and its VERY consistant with its STKN....if i do a standing start full throttle pass it doesnt show any knock until it hits about 6200rpm but the part throttle 50% knock is there every time
Try the 91CAI tune and monitor the STKR.
 
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