Sound Deadening

Subject: Sound Deadening Sun Nov 04, 2007 10:19 am

I have a 90 Chevy ext cab pickup. I have heard that sound deadening hurts your spl score and also helps it. Wondering what the truth is and what areas you think need deadening if any and how much. Will be in mod class.

Subject: Re: Sound Deadening Sun Nov 04, 2007 10:40 am

bduf wrote:: sound deadening hurts your spl score .

SPL Sound Pressure Level
Sound Deadening= Killing sound.

If your doing legal then yea I have heard of people using it because you want to make the vehicle as strong as possible to hold all the Pressure in the vehicle. Alot of vehicles that doing outlaw like to flex alil when running.
just my 2 cents take it how you want....

Subject: Re: Sound Deadening Sun Nov 04, 2007 11:12 am

ITs a matter of applying and testing, you cant say put a 6 inch square here and it will make you louder, it varies between each vehicle. I literally apply a sheet and test and compare it to my reference, if it hurts it comes off if not it stays. My doors end up looking like a dynamat jigsaw puzzle but it works.

Subject: Re: Sound Deadening Mon Nov 05, 2007 1:08 pm

i plan on add dynamat it my blazer one section at a time

Subject: Re: Sound Deadening Mon Nov 05, 2007 1:14 pm

Yep, it is all trial and error. testing,applying,testing,applying. Alot of work, but can gain a little doing it.

My van will have it on roof and back hatch. Even if it hurts a little, just don't want the back rattle and roof flex to much.

Subject: Re: Sound Deadening Mon Nov 05, 2007 1:22 pm

im just going to try the roof first

Guest

fornicate, no wonder why im not loud, i have too much sound deadener

Subject: Re: Sound Deadening Tue Nov 06, 2007 9:12 am

Every car reacts differenly. My car lost a couple db's With that,but I had no more rattling. I rather have the rattling and extra db's than the quietness.

Subject: Re: Sound Deadening Tue Nov 06, 2007 11:40 am

how much db did u lose?

Subject: Re: Sound Deadening Tue Nov 06, 2007 12:43 pm

About 2-3. My car needed to breath more air.

Subject: Re: Sound Deadening Tue Nov 06, 2007 1:56 pm

I did inner and outer on my back doors and 2 layers on my roof. It sounds so much better and I gained .2 LOL. I used dynamat extreme. This is in a 2003 F150 crew cab. I have heard that the note will change but mine stayed 47hz. Very Happy

Subject: Re: Sound Deadening Tue Nov 06, 2007 2:00 pm

I also heard that you would need to retune you box.

Subject: Re: Sound Deadening Tue Nov 06, 2007 11:12 pm

i'm in the process of doing the floor on my crx right now. the guy i bought the car from fiberglassed the rusted floor and did a bad job.

sorry if i hijack your thread just thought i would add some pics

here is so pics

Sound Deadening DSC_0023

here is a pic of the car

Sound Deadening DSC_0009

Subject: Re: Sound Deadening Tue Nov 06, 2007 11:49 pm

looks like justin whittys

Subject: Re: Sound Deadening Wed Nov 07, 2007 12:17 am

Looking for any help I can get.

Subject: Re: Sound Deadening Wed Nov 07, 2007 2:18 am

aphinney wrote:: looks like justin whittys

it was. i found it on termpro classifieds

Subject: Re: Sound Deadening Wed Nov 07, 2007 8:11 am

damn good looking car. Another alfaro creation if i remember correctly.

Subject: Re: Sound Deadening Wed Nov 07, 2007 10:23 pm

suprised it dint come with any mat already

Subject: Re: Sound Deadening Thu Nov 08, 2007 1:17 am

AlanHall wrote:: suprised it dint come with any mat already

it did in the rear and doors but after looking at the floor in the front i figured i would cover the front and cover over the rear.

i have heard i may lose some but at the sametime i might add a little. if i don't break 160 i have an idea to try, but i am hoping this will work

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