12-22-2009, 11:36 PM
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#11 (permalink)
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Base Member
Join Date: Aug 2009
Location: Melbourne, Australia
Posts: 112
Drives: 09' 370z Titanium MT
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Quote:
Originally Posted by earwicker7
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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This is simply a rattle, it was there before my exhaust. It only happened on one piece of road, once I left it, it was gone. This was on a highway no change in RPM's just a section of road that he been repaired. Now after the exhaust even rolling along the road I get the rattle. My RPM would be no more than 2000 at the most.
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