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Vibration.... Vibration....
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  #2 (permalink)  
Old 11-06-2013, 06:59 PM
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Join Date: Oct 2013
Location: Denver, CO
Cobra Make, Engine: BDR, #209
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It may be your cam. I have a 347 and around 2000-2500 RPM the valve overlap causes an odd vibration, rumble, or even a whooshing sound. Noises and vibrations are hard to describe. I am not sure how to verify this though. BTW my cam is pretty radical and this started after I installed it.
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