Thread: Drone sound I think
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Old Sat, August 11th, 2012, 08:52 AM
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Longshot270 Longshot270 is offline
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Hopefully the OP will post up results. Unfortunately I'm going with a harmonic vibration theory and it just happens because of a variety of conditions lining up perfectly to cause standing waves.

Your exhaust modification doesn't need any kind of tuning because the "y" is still intact.
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