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dap930 dap930 is offline
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Join Date: Dec 2011
Location: Virginia Beach, VA
Posts: 418
What I did was record several data logs to monitor the knock levels for each cylinder. You will have to adjust the gains for each cylinder to get fairly equal knock levels. Then you can adjust the % threshold that will trigger a knock retard event based on where you see the levels going. I have not tried to induce knock to see what it looks like on a log. But I did get some readings over 70% when I hit overboost cutout which may have been knock when I was tuning EBC. So I have just left my threshold set at 50%. Some of the folks on Megasquirt forums have tried the second derivative of the knock frequency and have some success with it.
1977 930 Slant, MS3 EFI, Carrera intake, Twin plug, Powerhaus headers, Magnaflow muffler, Garretson intercooler, GTX3071R
Old 06-13-2017, 07:49 PM
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