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Old 02-23-2018, 07:13 PM
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Dozerboy Dozerboy is offline
Join Date: Jun 2009
Location: TX of course
Posts: 3,871

Default Finally installed sound deadening on my truck.

Been wanting to do this for years, but I didn't have much motivation. Now between the 5" stright pipe, mud tires, and louder turbo I can barely talk on the phone while driving. Being a little hard of hearing doesn't help. This year we are going on cross country trip pulling a RV and that pushed me to get started.

For material I use Raammat Package #1 and 4 extra sheets of mat. Plus sheet of 26ga galvanized steel to seal the holes in the doors.

I didn't really want to go crazy right off the bat. So I just did the doors and back wall since I'm told those are the worst for noise. I also wanted to seal off the holes in the door to get better sound out of my stereo. I did 1 layer of mat on the outer door skin, sealed the holes, 50% coverage of mat on the inter skin aswell as a layer of acoustic foam. Sealing off the holes in the door took longer then I hoped. I bet I had 15 hrs in just metal work, but my metal working tools where just a hammer and bench vice and I'm far from a metal worker. I did 2 layers of mat on the back wall 100% and 50% coverages. Then a layer of acoustic foam. I stuff some large pieces of acoustic foam inside the pillars on the back wall. I was surprised how much Echo there was back there. I had maybe 8hrs in sound deadening.

I'm real happy with how much better the stereo sounds, but was hoping for more of a reduction in noise. I used a niosh decibel meter on my cell phone to see how noisy it was in my truck before and after. Before at 70 mph I was hitting 67-68dB after it was 65-66dB. A 3dB reduction in volume means did it half as noisy in my truck. For comparison my stock 08 Chevy 2500 6.0L with the same tires is at 66-67dB and I think 60dB with my brand new ATs. I will definitely be going with different mud tires next time. These Goodyear MTRs are the loudest streetable mud tires I've had.

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06 GMC 2500 CCSB SLT LBZ 4X4

These views expressed on this post are not my own, but rather randomly generated computer gibberish, and in no way should be used to judge the author's IQ or mental health.
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