Idea for eliminating the dreaded exhaust drone from Mustangs with dual exhaust.
filed in Ford Mustangs
Question: While I was reading an article from an older issue of a Porsche magazine about the 993, it gave me an idea. In the article, it said that Porsche’s engineers spaced the tailpipes apart one half of the distance of the length of the sound wave that the exhaust system produces. This eliminated a lot of noise and got rid of the lower rpm drone that the pre production test models had. If someone could figure out the length of the sound wave that the exhaust system produces in the 1800-2200 rpm range, the tailpipes could be placed 1/2 of that distance apart and it would eliminate the “dreaded drone” that a lot of Mustang owners complain about.
What does everyone think of this idea? Is there anyone willing to figure out that distance and share it with other Mustang owners so we can experiment with moving our tailpipes to that distance so the noise is eliminated or reduced?
Answer: Even better, remove your carpet and seats. Layer the entire floor w/ lead foil. It’s similiar to alum. foil, but it’s lead. This works great, but don’t take my word for it. Ask any rochet scientist. Lining the floorpan with lead foil would have virtually no effect on the sound. Various outfits sell sound deadening matting (you can even get it from Crutchfield I think) that comes with adhesive on one side. If you put that on the pan/trunk and perhaps behind the firewall, you’ll notice quite a difference.
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