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View Full Version : how to "seal off" the trunk?



ab18vfl
12-07-2012, 02:27 AM
Soon, I'm building a new box, I want to have it firing forward towards the cabin. Due to competition class restrictions, I cant use greatstuff foam and I cant alter any stock parts of the car. What do you guys recommend to "seal" my trunk off with? Possibly pool noodles?

Dtrom
12-07-2012, 02:30 AM
Mdf

ab18vfl
12-07-2012, 02:32 AM
how is MDF airtight at all?

mlstrass
12-07-2012, 02:33 AM
I recommend testing on a TL to see which way is louder. Too many idiots on here say to seal it off, but 99% of them are just repeating what other idiots have posted.

FYI...the loudest trunk vehicles at World Finals were forward firing and NOT sealed off. Only way to tell what is louder is to try it both ways in your vehicle with your set up

mlstrass
12-07-2012, 02:36 AM
how is MDF airtight at all?

I hope you're not being serious, but I'm sure you are....

ab18vfl
12-07-2012, 02:42 AM
I hope you're not being serious, but I'm sure you are....

im talking about the gaps between the box and my trunk wall. im trying to figure out what to wedge between those gaps to keep the airflow and bass in my cabin

nu2spl
12-07-2012, 02:47 AM
how is MDF airtight at all?

dude fiberglass resin thats how to make MDF air tight

ab18vfl
12-07-2012, 02:51 AM
okay I CANT USE GLUES, FOAMS, OR FIBERGLASS in my trunk

mlstrass
12-07-2012, 02:59 AM
im talking about the gaps between the box and my trunk wall. im trying to figure out what to wedge between those gaps to keep the airflow and bass in my cabin

I know exactly what you're talking about. You need to test to see if it's louder unsealed or sealed off.

MDF and duct tape work just fine if you find that sealing it off is louder...

ab18vfl
12-07-2012, 03:05 AM
I know exactly what you're talking about. You need to test to see if it's louder unsealed or sealed off.

MDF and duct tape work just fine if you find that sealing it off is louder...

ive done a ton of testing and i cant break a 140 with the seats on.

nobody ever mentioned duct tape, that just sounds...genius

mlstrass
12-07-2012, 03:08 AM
ive done a ton of testing and i cant break a 140 with the seats on.

nobody ever mentioned duct tape, that just sounds...genius

I did a 54.9 out of the trunk...NOT sealed off

Duct tape = simple :cool:

cfox10
12-07-2012, 03:14 AM
How about using some vinyl? Mass loaded? or use something like acoustic wood with some rubber seals around the edges and wedge them in there. The cuts would have to be really good though.

nu2spl
12-07-2012, 03:16 AM
okay I CANT USE GLUES, FOAMS, OR FIBERGLASS in my trunk

ok you cant resin the inside of your box?

4bannger
12-07-2012, 06:58 AM
You could use a laminate faced Mdf and carpet it too. The Laminet would make the Mdf similar to grassing it. But without cheating

Julian
12-07-2012, 07:10 AM
Gorilla tape seems like your only option... or metal flasking tape is what I've used before.. 2x4's also work.

GeekSquad
12-14-2012, 11:57 PM
Man get some stinger roadkill and go to town on the gaps.

Hope this helps!

TaylorFade
12-15-2012, 12:56 AM
Just sayin...

http://i848.photobucket.com/albums/ab45/taylorfade/wrxf7c_zps77820e27.jpg


http://i848.photobucket.com/albums/ab45/taylorfade/Builds-boxes/63f6d2e3.jpg

http://i848.photobucket.com/albums/ab45/taylorfade/Builds-boxes/DA1A8C05-516E-45B0-A95E-B2E6216944C5-2229-00000128767B25D5.jpg

http://i848.photobucket.com/albums/ab45/taylorfade/Scrapin/4b9a853d.jpg

http://i848.photobucket.com/albums/ab45/taylorfade/Builds-boxes/8e4341d2.jpg

mlstrass
12-15-2012, 06:57 AM
What TF is saying is that those guys aren't loud cuz they're not sealed off :p:

CAT MAN
12-15-2012, 08:15 AM
great stuff+mdf is the only real seal