was wondering if anyone might know this ... i want to build myself a box in the back of my 89 RS for 2 12" subs. Does anyone know how much cubic airspace is in the rear if the box was made so that the rear was flush? (so instead of having that dip, the box would level everything out). i know there is a formula to find out but i dunno what it is. I want to choose the subs based on how much airspace is avaliable. also, what material would you recommend i build the box out of? (my last retarded box was cheapo pressed wood and it sounds like crap!! hehhe) thanks every1!!

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--- Currently ---
Maroon 1989 Camaro RS
Crappy 305 TBI / Auto
Hypertech Stage 2 Chip (and 160/ThermoStat)
2.5" Pipes, No Cat, Flowmasters (Dual)
GT Grant Wheel

Planned: Shaved keyholes, antenna
British Racing Green w/ White Racing Stripes
17" Powdercoat White Wheels, New Tint

--- Next Project ---
1992 Camaro z28
K1 Interior Kit, Sparco Seats, Tweeded Interior
TurboCharged L98 w/ T56
Full Suspension, Brake Upgrades, Y2K Vette Wheels (polished)
LOTS of bodymods and PPG Porsche Pearl Blue paintjob

 

Area is generally computed by:

Length x Width x Height

If you measure in inches, then divide your total by 12 to get cubic feet. This will give you a ballpark estimate.

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92 Camaro RS LO3, 5-spd, T-tops
Performance:
SLP 1 3/4" Headers (Coated by Paul Barry Motorsports), Flowmaster Catback Exhaust, Fastchip Performance PROM, Centerforce Dual Friction Clutch, Xact 8mm wires, Open Air Element w/K&N Filter, Z28 Grille w/aftmkt fog lamps
Electronics:
Alpine 8030 Alarm System, Valentine One Radar Detector (How did I ever drive without one?), Pioneer DEH 7450 Head Unit w/6-pack CD changer, Pioneer DEQ 7600 Sound Processor, 2 Kenwood KAC-846 Amps powering 2 12" Pro Red subs, 2 Pioneer 6x9 and 2 MTX 4x6 speakers.
NEXT UP: TBI mods, Edelbrock performer intake

 

With a box, you can get about 1.25 cubic feet with a flush panel. If you use a fiberglass enclosure, you should be able to get a lot more.

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The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

 

my box is flush and has three 10w6 was made out of half inch mdf. it has 2.3 cubic feet of air space with no subs in box.

 

ahhhh divide by 12 ok hahha now i feel kinda retarded. thanks for the help guys!!! wow 3 10w6's huh??? daym that must sound nice ... i got a single 10w6 in my truck ... could get 2 more instead of 2 12w6's ... do you have any pics of your setup? are the subs straight across or are they in a triangle shape?

------------------
--- Currently ---
Maroon 1989 Camaro RS
Crappy 305 TBI / Auto
Hypertech Stage 2 Chip (and 160/ThermoStat)
2.5" Pipes, No Cat, Flowmasters (Dual)
GT Grant Wheel

Planned: Shaved keyholes, antenna
British Racing Green w/ White Racing Stripes
17" Powdercoat White Wheels, New Tint

--- Next Project ---
1992 Camaro z28
K1 Interior Kit, Sparco Seats, Tweeded Interior
TurboCharged L98 w/ T56
Full Suspension, Brake Upgrades, Y2K Vette Wheels (polished)
LOTS of bodymods and PPG Porsche Pearl Blue paintjob

 

that would be divide by 1728 to get the cubic feet figured. 12 cubed

 

Watch out using 2 W6's. You will need a sweet amp because the the W6 is a dual 6 ohm.

You'll probably be happier with a single 4 ohm sub!! or like you said a third W6 which would even it out.

edit:
Well these guys are already talking about it.
https://www.thirdgen.org/messgboard/...ML/001027.html

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1988 Formula L98
1988 IROC-Z supercharged
http://www.shsu.edu/~stdvjs11

[This message has been edited by Val (edited April 15, 2001).]

 

I have a custom box from Exciter Sound in BC Canada. It is spec for 2.9cuft. My subs want 1.36cuft a piece so it works out just fine. My box pops up a bit.

 

9177 is right. After you calculate the volume your answer is in inches cubed. You need to convert to cubic feet so devide by 1728 or 12^3. Now you will have an acuurate measurment.


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1990 RS 305 TBI T-5
.5" turbocity spacer
Summit 14X3 OpenElement W/k&N
Custom Exhaust
MSD - Wires, Cap, Rotor, Coil
Bosch Platinum +4 plugs
Metallic Red w/26,000 miles

 

for the box
3/4' MDF