abervintageman42 Posted April 21, 2010 Report Share Posted April 21, 2010 which one do you guys use, this one? http://img713.imageshack.us/img713/2590/tuningformula.jpg or this one? (.159)square root(cross sectional area of port)(1.84x10^4)/(net volume)x(length of port + .823 x cross sectional area of port) ive used both the the second one seems more accurate but would anyone mind walkin me throguh these? Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted April 21, 2010 Author Report Share Posted April 21, 2010 Damn guys help a fellow basshead out Quote Link to comment Share on other sites More sharing options...
n8ball2013 Posted April 21, 2010 Report Share Posted April 21, 2010 torres (expo) cleared these up better than anyone could Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
abervintageman42 Posted April 21, 2010 Author Report Share Posted April 21, 2010 Not for me dude, his box calculator won't give me the port sides on the cut sheet Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted April 22, 2010 Author Report Share Posted April 22, 2010 Damn figured someone woulda said something by now! Quote Link to comment Share on other sites More sharing options...
Mrbubbles00482 Posted April 22, 2010 Report Share Posted April 22, 2010 (edited) Just use the12volt.com box calculator and port calculator. All you have to do is accomidate for wood thickness and port displacement. I use those calculators first and then do things by hand to double check, which you really don't need to do because their calculators don't round up or down, it's exact measurements. Edited April 22, 2010 by Mrbubbles00482 Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted April 22, 2010 Author Report Share Posted April 22, 2010 I'd rather do it by hand, it ensures me that everything is accurate and I can use the port area I want Quote Link to comment Share on other sites More sharing options...
Decaf Posted April 22, 2010 Report Share Posted April 22, 2010 use this... put it in a graphic calculator and u will thank urself later http://img713.imageshack.us/img713/2590/tuningformula.jpg Quote Link to comment Share on other sites More sharing options...
abervintageman42 Posted April 22, 2010 Author Report Share Posted April 22, 2010 That's what I have been putting in there but it always comes out tuned to like 1000 somethiing idk what I'm doing wrong Quote Link to comment Share on other sites More sharing options...
Decaf Posted April 22, 2010 Report Share Posted April 22, 2010 (edited) order of operations my friend PEMDAS or "Please Excuse My Dear Aunt Sally parenthesis, exponents, mulitply, divide. addition, subtraction Edited April 22, 2010 by Decaf Quote Link to comment Share on other sites More sharing options...
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