Dash Board rattle

[B1nks]

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.

Originally Posted by earwicker7

Bloody hell, behind the cluster area too (EDIT--maybe, are you talking about the cluster of RPM, MPH, etc., or the voltage, oil temp, etc.? Mine is behind the RPM one.) And it usually (there are exceptions) only shows up under load at around 3000 RPM, i.e., at least 40 mph. My dealer is in an area with bumper to bumper traffic, so they think I'm crazy since I can't get it to rattle on demand at 20 mph.

I'm considering taking the damned dash off myself, even though I have no skills in this area. How hard would it be to get at the area behind the cluster? I've got a feeling it's probably just something that is loose.

BTW, this didn't start until after I put the FI exhaust on... it's loudest at right around 3000 RPM.

[earwicker7]

Originally Posted by B1nks

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.

[Lord Kain]

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.

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.