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Old 12-22-2009, 11:18 PM   #14 (permalink)
earwicker7
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Join Date: Jun 2009
Location: Burbank, CA
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Drives: 09 370Z (maxed out)
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Quote:
Originally Posted by B1nks View Post
Same exact thing here ! At about 2500-3000 under load mine will make a buzzing sound from what sounds like behind the RPM cluster. Started after I installed my FI exhaust. Not blaming FI..just wierd.
No, of course it isn't FI's fault. Knowing a bit about speakers, I've picked up a feel for resonance issues, and given that I'm not the only one experiencing this exact problem, I'm thinking one of two things...

A. The sonic frequency which the exhaust puts out between 2500 to 3000 RPM is exciting a resonance mode in some part of the dashboard, causing it to vibrate like mad and bang up against something next to it.

B. The same as A, except it is causing a resonance mode in some loose part in the same area.
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2009 Magnetic Black 370Z with Touring, Sports and Navigation Packages--Fast Intentions CBE with 12" Resonators/Carbon Fiber Mufflers and LTH--Stillen G3 Cold Air Intakes, Underdrive Pulley and Grounding Kit--Uprev Tune
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