Digging up this thread in hopes someone could help assist. Read every page and like to get a little more confirmation.
Looking to do this mod to the new Invidia CBE I've installed (that I'm already regretting coming from a Motordyne CBE). It's droning horribly from 1900-2800.
At around 2000 RPM it seems to reverberate across three peaks, strangely 50hz apart... ~100, ~150, ~200.
Past this point 150 becomes the dominant droning frequency.
Photos attached of both occurrences.
According to the formula in this thread I get a length of 22.5"... but that seems quite small compared to the 28-30 I'm seeing thrown about.
Does this still seem right?
Speed of Sound / ( (frequency) x 4 )
1125 / ( 150 x 4 ) = 1.875ft > 22.5in
Last edited by MoulaZ; 06-19-2017 at 01:27 AM.
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