Dynamat in the trunk

darkphantom · 07-10-2015, 04:09 PM

Quote:

Originally Posted by JARblue

Dynamat is just a vibration dampener. The CCF is the stuff that actually helps with noise.

No need to pay for the Dynamat name. I used GTMat's Onyx product (they are local). It cost <$50 to do the entire hatch.

You have a local contact? Send me a PM, I might pay them a visit or just an email - trying to get an idea of how much they charge? I might just do it myself on a saturday, though.

Chuck33079 · 07-10-2015, 04:14 PM

Quote:

Originally Posted by darkphantom

I might just do it myself on a saturday, though.

This. It's really tedious, but not hard. I can imagine the labor on this being really high.

cranzy · 07-11-2015, 12:25 PM

Quote:

Originally Posted by Chuck33079

This. It's really tedious, but not hard. I can imagine the labor on this being really high.

It took me 3 days x 2 hours every day after work. Now, the labor is simple enough, however it's tiring. You are either bending over the trunk or cutting the dynamat inside the trunk (unless you want to get out of it every time you need to cut something).

moore.speed · 07-13-2015, 09:26 AM

Spent about 4 hours yesterday on my hatch and have it finished up with the RAAMmat BXT II sheets from RAAMaudio. The application was pretty lengthy and tedious like others have said but I this stuff is really flexible and applied very well. Applying the Ensolite foam over it tonight before putting the plastics back in.

The "Package #1" that I bought was the best deal I found and had to pull the trigger last week. It came with 20 sheets of BXT II material (37.5 sq ft) and 3 yards of Ensolite foam (41.625 sq ft). Thanks again, Chuck, for recommending this product.

Excuse the microfiber towel and windex in the hatch

JARblue · 07-13-2015, 09:58 AM

Quote:

Originally Posted by darkphantom

You have a local contact? Send me a PM, I might pay them a visit or just an email - trying to get an idea of how much they charge? I might just do it myself on a saturday, though.

How much sq ft do you want of which product? In addition to the Onyx butyl product I used, they also have a product called Quadro, which is essentially the Onyx butyl product with foam already adhered to it. Pretty convenient, but I have zero experience with it.

And btw, I did the install myself. So that price was just for the Onyx product I purchased, not any labor. I did my hatch install in approximately 6 hours with four 30 min breaks.

darkphantom · 07-13-2015, 11:12 AM

Quote:

Originally Posted by JARblue

How much sq ft do you want of which product? In addition to the Onyx butyl product I used, they also have a product called Quadro, which is essentially the Onyx butyl product with foam already adhered to it. Pretty convenient, but I have zero experience with it.

And btw, I did the install myself. So that price was just for the Onyx product I purchased, not any labor. I did my hatch install in approximately 6 hours with four 30 min breaks.

No idea how much sq ft I need but I want to cover the rear fenders and trunk - that quadro stuff sounds like it has both the deadening and vibration material.

My other question is if we need to entirely cover everything? The CLD Tiles site mentioned just putting it in patchy spots as you don't need to cover everything - is that the same for this stuff?

cranzy · 07-13-2015, 12:13 PM

Quote:

Originally Posted by darkphantom

No idea how much sq ft I need but I want to cover the rear fenders and trunk - that quadro stuff sounds like it has both the deadening and vibration material.

My other question is if we need to entirely cover everything? The CLD Tiles site mentioned just putting it in patchy spots as you don't need to cover everything - is that the same for this stuff?

I think to cover the whole hatch it takes around 30 sq ft of material.

You don't need to cover everything, I haven't. The more you cover the better the isolation.

cooltoy · 07-13-2015, 12:51 PM

So what is the final dB measurement?

RyanWest · 07-14-2015, 12:18 AM

In for final before and after dB readings!

JARblue · 07-14-2015, 11:11 AM

FWIW, I think the CCF is the stuff that will really affect dB readings. I borrowed a dB reader and the difference between my before and after readings was statistically insignificant with just the vibration dampener installed in my hatch. Even the difference between my before readings with the hatch completely bare and after with the Onyx installed and the spare tire and all panels put back in the hatch was very minimal.

cranzy · 07-14-2015, 12:15 PM

Quote:

Originally Posted by cooltoy

So what is the final dB measurement?

Oops. Forgot to do the measurement yesterday. If JARBLUE is correct then the db difference won't be significant. However, the sound is damped down and you can have a normal convo in the car (tested with a 350z friend of mine). Stay tuned for the db numbers.

cranzy · 07-14-2015, 11:55 PM

Here are the screen shot of the DB reader I took just for you peeps

Btw this is not the same reader that I initially used, but it gives you a good hint for how noisy the car is now.

cooltoy · 07-15-2015, 12:10 AM

So an increase from 20 to 59?

Love how they spelled breathing.

cranzy · 07-15-2015, 12:17 AM

Quote:

Originally Posted by cooltoy

So an increase from 20 to 59?

Love how they spelled breathing.

Lmao. I just noticed the brething xD. Anyhow, no man, it didn't increase, when I did the initial testing it was with some iOS sound meter app. This one is Android sound meter. I might borrow iOS just to confirm the numbers... I guess

RyanWest · 07-15-2015, 03:44 AM

Use one app and report back please

07-13-2015, 12:51 PM	#38 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,971 Drives: 14 PW 370Z S/T MT Rep Power: 243722	So what is the final dB measurement? __________________ Member of kenchan's "photoshopped mods" and "proper offsets" gang.

07-14-2015, 11:11 AM	#40 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	FWIW, I think the CCF is the stuff that will really affect dB readings. I borrowed a dB reader and the difference between my before and after readings was statistically insignificant with just the vibration dampener installed in my hatch. Even the difference between my before readings with the hatch completely bare and after with the Onyx installed and the spare tire and all panels put back in the hatch was very minimal. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

07-15-2015, 12:10 AM	#43 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,971 Drives: 14 PW 370Z S/T MT Rep Power: 243722	So an increase from 20 to 59? Love how they spelled breathing. __________________ Member of kenchan's "photoshopped mods" and "proper offsets" gang.

07-15-2015, 03:44 AM	#45 (permalink)
RyanWest Track Member Join Date: Jan 2012 Location: Tamp, Fl Posts: 714 Drives: 2009 Nissan Rep Power: 33	Use one app and report back please cooltoy likes this.

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07-14-2015, 12:18 AM	#39 (permalink)
RyanWest Track Member Join Date: Jan 2012 Location: Tamp, Fl Posts: 714 Drives: 2009 Nissan Rep Power: 33	In for final before and after dB readings!

07-14-2015, 11:55 PM	#42 (permalink)
cranzy Base Member Join Date: Mar 2015 Location: Seattle Posts: 108 Drives: 370z Rep Power: 10	Here are the screen shot of the DB reader I took just for you peeps Btw this is not the same reader that I initially used, but it gives you a good hint for how noisy the car is now.