Yet another question about pollyfill...

[Afboy143 10+ year member]

Well today i made a box for my truck, and i stuffed it full of pollyfill. Its filled every lil bit is pollyfilled on the inside. Im not sure how much airspace is in the box to b truthful cuz im not good at all with math. Well the real question i was asking is, is there such thing as "over polly filling" a sub box? Should i take some out or what? Thanks guys

Click to read more...

 

[Jayls5 10+ year member]

Yea, i'm sort of wondering. Aren't you supposed to put chicken wire or something in there to keep the polyfill back from the sub?

 

[evo2k3 10+ year member]

Originally posted by Afboy143 Well today i made a box for my truck, and i stuffed it full of pollyfill. Its filled every lil bit is pollyfilled on the inside. Im not sure how much airspace is in the box to b truthful cuz im not good at all with math. Well the real question i was asking is, is there such thing as "over polly filling" a sub box? Should i take some out or what? Thanks guys

yeah ....there are ratios, I think that you usually stuff 0.5 - 1 lbs of polly for every cubic foot.....but i could be wrong. It should be filled, but not compacted.

 

[mgaidica 10+ year member]

can u do polyfill in a ported box? if so do u change your port calculations?

 

[Gauntlet 5,000+ posts]

Generally, the ratio is anywhere from 16-20 oz. per 1 cubic foot...

No need for the chicken wire....that's an old wives tale.

And putting polyfill in a ported box is not the smartest idea...

 

[Afboy143 10+ year member]

Hm i have 40 oz in my box right now, its pretty compacted. Its in a truck box and there is no wall in the middle. How do i calculate the sq. ft in that.

 

[evo2k3 10+ year member]

Originally posted by Jayls5 Yea, i'm sort of wondering. Aren't you supposed to put chicken wire or something in there to keep the polyfill back from the sub?

no

 

[Gauntlet 5,000+ posts]

Originally posted by Afboy143 Hm i have 40 oz in my box right now, its pretty compacted. Its in a truck box and there is no wall in the middle. How do i calculate the sq. ft in that.

The square feet of the box, or the square feet of the box with the polyfill?

 

[evo2k3 10+ year member]

Originally posted by mgaidica can u do polyfill in a ported box? if so do u change your port calculations?

no...that would defeat the purpose of increasing air movment.

 

[mgaidica 10+ year member]

yeh, i figured it wouldnt help, hurt more, thanks evo..

 

[evo2k3 10+ year member]

Originally posted by Afboy143 Hm i have 40 oz in my box right now, its pretty compacted. Its in a truck box and there is no wall in the middle. How do i calculate the sq. ft in that.

its volume....not area so its cubic feet. if its a cube or rectangular prism it is just the inside demensions of the box (h x w x d) in inches divided by 12^3......that would give you the volume in cubic feet of the box.

 

[Afboy143 10+ year member]

How do i calculate the sq. ft. in the box so i can determine how much polly fill i should put in there The box looks like this. Yes i know its a bad pic i did it in 30 seconds. And yes the box is like a L shape, i had to make it fit behind the seat of an older s10 without cutting nething out

First pic on this post is the box i have

http://forums.caraudio.com/vb/showthread.php?threadid=29770

 

[Gauntlet 5,000+ posts]

Take a ruler/yardstick and give us the outer dimensions of the box and we can help ya'

 

[evo2k3 10+ year member]

Originally posted by Afboy143 How do i calculate the sq. ft. in the box so i can determine how much polly fill i should put in there The box looks like this. Yes i know its a bad pic i did it in 30 seconds. And yes the box is like a L shape, i had to make it fit behind the seat of an older s10 without cutting nething out

 

First pic on this post is the box i have

 

 

http://forums.caraudio.com/vb/showthread.php?threadid=29770

I just told you how to calculate the volume....its not like it is difficault math.

 

[Gauntlet 5,000+ posts]

Originally posted by evo2k3 I just told you how to calculate the volume....its not like it is difficault math.

Maybe the L shape confuses him? I have no idea.

*shrugs*