Japspec
Japspec New Reader
5/6/17 10:39 p.m.

Hey guys...so I have an exhaust on my Miata that causes A LOT of drone and vibration/resonance through the cabin. So I was wondering, if I was to get a 23" cherry bomb glasspack or a long vibrant resonator installed in the midpipe, would my interior stop vibrating and would the drone be cut down? It has a resonator in there right now, but I'm thinking of adding an additional one. When I mean interior vibration and resonance, you can literally feel it in your head.

Woody
Woody MegaDork
5/7/17 1:47 p.m.
PeteD
PeteD New Reader
5/7/17 3:45 p.m.
Japspec wrote: When I mean interior vibration and resonance, you can literally feel it in your head.

I had a '94 Miata with an exhaust that sometimes sounded like metal ball-bearings being shaken in a glass jar - awful!

It turned out that the driver-side motor mount had failed and was allowing the aftermarket header collector to hit the frame at times. The fix for me was a set of stiffer (mazdaspeed?) motor mounts.

Maybe good to check for (marks on the header, frame) on your car too, especially if you have aftermarket exhaust.

-- Pete

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