View Full Version : fart box design

05-04-2010, 12:55 AM
hey im looking into build a budget fart box...

i'll be running a 12 type r and a 500/1 for power.

im just looking to spl the box not listen to it on music.

it'll be goin in a 2003 grand am. thinking of doing a external port.

what would be my best options to get this thing box wise?

size and tuning

05-04-2010, 12:59 AM
1.25 cu ft box external 6" aeroport 15" long

Bumpin' Goalie
05-04-2010, 01:02 AM
1.25 cu ft box external 6" aeroport 15" long

Word. Except I'd go bigger on the box. More efficient. He doesn't have a lot of power to throw at it. 6" aero port @ 50ish hz in that car.

05-04-2010, 01:04 AM
Word. Except I'd go bigger on the box. More efficient. He doesn't have a lot of power to throw at it. 6" aero port @ 50ish hz in that car.

your right I'm use to more power...maybe 1.75 same port demensions

Bumpin' Goalie
05-04-2010, 01:05 AM
I vote 2 cubes after displacements with 6" or maybe try even an 8" aero. CRX style :)

in 2 cubes a full length 8" aero (18") would be right around 53hz. Would be obnoxious (loud)

06-22-2010, 08:37 PM
so i ended up makin a box little smaller then planned it 15x15x18.5...it was all i could make with the wood i had...so 1.75 should be the total size if i figured it out right...i'll me mounting the sub inverted for more space in the box....now i all i have is 3 inch pvc for ports how could i use this instead of one 8inch peice...i can't seem to find a calutor to figure it out? any ideas on lenght and how many pieces?

06-22-2010, 08:42 PM
idea of a burp box is to reach the max limits and output of the sub so i would have gone 2.5 cubes tuned to 50 with that power. less power equals bigger box. 2.5 cubes will give u alot of output and for daily would not be that great but for spl it would have alot of output and put up decent 40s for numbers

06-22-2010, 08:46 PM
k but my box is 1.75 now i might build a new one in the future but...if i wanted to tune it 50-56 hz range how long would the 3 inch pvc need to be and how many should i run?

06-22-2010, 08:57 PM
Four 3" ports cut to 15" long tunes to 50hz (or a bit under) Start there and you can cut down an inch at a time if you need to tune higher. I'm assuming you want max port area. You could do more if you don't mind longer ports.

Download winisd (it's free) it'll allow you to calculate volume/port/tuning etc.

06-22-2010, 09:04 PM
Products Menu (http://www.psp-inc.com/tools.html)

your welcome

06-22-2010, 09:08 PM
3" pvc is bad

06-22-2010, 09:09 PM
i agree. do either 1 6 or one 8. i say one 8 in 2 cubes. would be 25 inches of port per cube :D awesome!

06-22-2010, 09:53 PM
thanks guys

07-16-2010, 08:03 PM
just finished a new box when with 2.5 cubes after displacement and 8 port tuned to 55 hz

07-16-2010, 08:04 PM
sweet! any numbers?

07-16-2010, 08:07 PM
nope not yet just tossed it in...now im new to slp when tuned high i take it you don't feel the bass as much ? or am i wrong...

07-20-2010, 08:42 PM
well TL it today and im not impressed i hit 135.7 at 50hz 500/1 for power? any idea on how i could change thing to make it louder, with the same gear ?

07-20-2010, 08:48 PM
Box placement has a lot to do with it try moving it around answer if you improve

07-20-2010, 08:49 PM
What frequency did you burp at, and do you know what your car peaks at?

07-20-2010, 10:44 PM
i don't knoe what my car peaks at nor do i know how to figure it out???any ideas how? and i tried a bunch of tones 35 up to 65 and 50's where it metered highest