I seem to see a large amount of KR, sometimes up to 9*. The key seems to be it only occurs between 2200 ond 3000 rpm predominantly when the tps reads over 90% sometimes when it is in the high 80's.

I tend to think this is due to harmonics more then anything since the only kr shown is during this time and this time only.

Agree or Disagree?

 

cannot agree or disagree without more info.

is your car stock ? if not what mods?

using an LT4 knock module ?

what is your spark advace set to at 2200-3000 rpms in your PCM at the higher KPA #'s ?

Hve you had your PCM tuned?

What octane fuel are you using ?