sound - Ford Mustang Forum
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post #1 of 3 (permalink) Old 01-14-2018 Thread Starter
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Joined: May 2014
Location: Layton
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I'm going to add more insulation to my 1964.5 mustang hardtop. I've got a 289, 4 barrel autolite with a 4 speed toploader. I have 2 1/4 pipes with a H pipe & dual exhaust (turbo mufflers).
Where would the sound insulation do the most good at reducing the interior noise level?
Thanks for any advise! Brent.

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post #2 of 3 (permalink) Old 01-14-2018
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A great place to start is under the carpet, the insides of the door panels, and finally if you have to take out your headliner, definitely do the roof.

A lot of sound comes in through the trunk too - you might consider putting a firewall divider in behind your rear seat (which will increase rigidity for your car a lot as well) and then putting dynomat (or similar) on it to really silence things.

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post #3 of 3 (permalink) Old 01-15-2018
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A quick way to check where your sound originates is to have a friend use a mechanics stethoscope while you're driving. Sound will transmit throughout the metal framework and you will be able to find the most serious noise levels.
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