Best way to judge air space???

[FrEnChYII 10+ year member]

Ok, so I am bilding a fiberglass box for my truck, and I am running a JL 13w7 and I have no way of telling how big my box currently is. What's the best way??? I have heard of putting water in it or some shit like that, but wouldnt that ruin the MDF?

Click to read more...

 

[Worlddre 5,000+ posts]

packing peanuts

 

[ravendarat 10+ year member]

packing penuts. Fill the box with packing penuts then start emptying them into a 1 cubic foot box, that way you can keep track of how many boxes you had and it should give you a decent Idea of your airspace

 

[rippinitup7 10+ year member]

Sand might be a little more accurate?

 

[ravendarat 10+ year member]

Sand might be a little more accurate?

Might be but if its a big box its gonna get heavy real quick, as well if its got fiberglass with it and this is a test of size before all the layers are done it can put to much preasure on the box and crack it or seperate it from the bezel

 

[FrEnChYII 10+ year member]

Ya, I am guessing my box to be like 3.5 - 5 ft^3... then again, I dunno how to tell.

It's 44W x 16H x 14D. But there are bends and what not that are gonna be in there.

 

[helotaxi 5,000+ posts]

The smaller the material particles used, he more accurate the measurment.

 

[80INCHES 5,000+ posts]

put a black glad bag in your box and fill it with water ...measure your box in liters

make sure the water is luke warm...not cold...cold water will make the bag sweat

or condensate

80

 

[96civ 10+ year member]

put a black glad bag in your box and fill it with water ...measure your box in litersmake sure the water is luke warm...not cold...cold water will make the bag sweat

or condensate

x2... water is pry the best, most efficient way to accurately determine the air space in the enclosure in that there are no separate grains/pieces in a liquid other than the tiny molecules that compose it... just take the extra time bagging it up if you want to be accurate, if not... resort to packing peanuts or another suitable option already stated.

 

[FrEnChYII 10+ year member]

Mer..... but I got a lot of bracing inside the box, and I can't put a bag in there.

Can someone help me finding how much air space before displacement would be in a 44 x 14 x 16 inch box. I figured my box out to be pretty much a complete square box. and when I did the guestimating I came up with like 8.7 ft^3.

I hope this isn't right. :-\

 

[helotaxi 5,000+ posts]

IF those are internal dims. then it's 5.7 cf.

 

[FrEnChYII 10+ year member]

Ya those are the internal dimensions.

****. Now I have to block a portion of it off.

How about a 28 x 14 x 16 inch box?

I want to get this thing done.......... lol