DIY Noise Reduction

'10Anamoly · 10-10-2011, 12:17 PM

So you bought the 1" thick, 0.75 NRC Skinned foam? How many feet long was the piece that had enough to do the trunk? I see that it is 54" wide by how ever many feet you buy. Was this the type without adhesive?

Guard Dad · 10-10-2011, 01:04 PM

My experience suggests that doing the the ENTIRE hatch area (I did the wheel wells but not the back side of the rear fenders) and the doors (the area behind the trim panels-also a great time to upgrade the door speakers) is the best first step. A 38 square foot box of Dynamat Extreme was just enough to do the job.

When that's done you'll be able to decide if you want more or if you are good-to-go.

Kingbaby · 10-10-2011, 04:14 PM

Awesome information!

Thanks I've been using a makeshift one I created, cause I stripped my rear trunk. This looks worlds better!

WhiskeyHotel · 10-10-2011, 04:51 PM

Quote:

Originally Posted by '10Anamoly

So you bought the 1" thick, 0.75 NRC Skinned foam? How many feet long was the piece that had enough to do the trunk? I see that it is 54" wide by how ever many feet you buy. Was this the type without adhesive?

Yea, I am wondering the same thing. If it had the adhesive, maybe I could stick it on the back or on top of the thin bottom mat.

B&W_Evader · 10-10-2011, 07:01 PM

No adhesive on mine.

I bought 6ft of 5692T13 but you can see how much is left over. Should be plenty to get a couple more dBs out of it. Adhesive might be nice but I have no idea how aggressive it is and whether it would stay bonded to anything.

koffeegy · 10-10-2011, 07:53 PM

Quote:

Originally Posted by WhiskeyHotel

Yea, I am wondering the same thing. If it had the adhesive, maybe I could stick it on the back or on top of the thin bottom mat.

The adhesive is there so you can get a good fit to the metal. The material actually helps reduce the vibration in the metal from the travel, which make the road noise. Just placing the material in the trunk would possibly help, but you would see a much bigger difference if it was glued down to the metal. I have been into car stereo's since high school, so I have seen a thing or two. Hope this helped.

REP please and thank you,

KevinB · 10-27-2011, 03:43 PM

I tested a 4 dollar solution ... Went to Home Depot and bought some Owens corning insulafoam. It comes in 1/2 and 3/4 sheets. I traced out the cargo mat and cut it out. I put the cargo mat on top. It weighs about a pound or so. Dropped from avg 89 to 87 going 70 down interstate in 6th gear. Standard Z.

10-10-2011, 12:17 PM	#16 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 16	So you bought the 1" thick, 0.75 NRC Skinned foam? How many feet long was the piece that had enough to do the trunk? I see that it is 54" wide by how ever many feet you buy. Was this the type without adhesive? __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd Last edited by '10Anamoly; 10-10-2011 at 12:20 PM.

10-27-2011, 03:43 PM	#22 (permalink)
KevinB Base Member Join Date: Sep 2011 Location: Louisiana Age: 53 Posts: 75 Drives: 09 370z blk m6 Rep Power: 14	I tested a 4 dollar solution ... Went to Home Depot and bought some Owens corning insulafoam. It comes in 1/2 and 3/4 sheets. I traced out the cargo mat and cut it out. I put the cargo mat on top. It weighs about a pound or so. Dropped from avg 89 to 87 going 70 down interstate in 6th gear. Standard Z. __________________ 09 6MT MB: Int/Ext LEDs, Stillen G3 + FI test pipes + FI cat back + Stillen sways + Clutch Helper Spring

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10-10-2011, 01:04 PM	#17 (permalink)
Guard Dad Enthusiast Member Join Date: Aug 2010 Location: South Orange County, CA Posts: 422 Drives: 2010 370Z Silver A7 Rep Power: 15	My experience suggests that doing the the ENTIRE hatch area (I did the wheel wells but not the back side of the rear fenders) and the doors (the area behind the trim panels-also a great time to upgrade the door speakers) is the best first step. A 38 square foot box of Dynamat Extreme was just enough to do the job. When that's done you'll be able to decide if you want more or if you are good-to-go.

10-10-2011, 07:01 PM	#20 (permalink)
B&W_Evader Track Member Join Date: Aug 2011 Location: CA Posts: 972 Drives: slower than before Rep Power: 387	No adhesive on mine. I bought 6ft of 5692T13 but you can see how much is left over. Should be plenty to get a couple more dBs out of it. Adhesive might be nice but I have no idea how aggressive it is and whether it would stay bonded to anything.