Knock Frequency Calculator

Knock Frequency can be estimated from the piston diameter. The results of this calculation are only an estimate, but the result will be sufficient to greatly enhance the accuracy of your Phormula KS-3 or KS-4 Knock Detector.

Example: If you have 73mm diameter pistons, select a frequency of 8 kHz on the KS-4 as this is the closest frequency. 

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