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View Full Version : Best way to judge air space???



FrEnChYII
07-22-2006, 12:45 AM
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 **** like that, but wouldnt that ruin the MDF?

Worlddre
07-22-2006, 12:48 AM
packing peanuts

ravendarat
07-22-2006, 12:48 AM
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
07-22-2006, 12:51 AM
Sand might be a little more accurate?

ravendarat
07-22-2006, 12:53 AM
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
07-22-2006, 12:54 AM
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
07-22-2006, 11:44 AM
The smaller the material particles used, he more accurate the measurment.

80INCHES
07-22-2006, 12:51 PM
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
07-23-2006, 02:03 AM
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
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
07-29-2006, 01:29 AM
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
07-29-2006, 10:06 AM
IF those are internal dims. then it's 5.7 cf.

FrEnChYII
07-29-2006, 12:09 PM
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