Box tuning and port size help

[REDz28 10+ year member]

So been using my current throw togther in a day box, tuned to 34hz with bout 2.4 ish cubic feet. I hit 136-138 a lot and a couple times got 139 off some sweeps. This is off one 12" American Bass VFL Exterme. I found out today the resonance frequency of my car is 49hz and that's where I've been peaking I guess. This is on a 2002 Camaro, so hatchback. I'm thinking of doing sub up close to the port, then port facing rear. Tuned to 46hz? Need help figuring out where to tune this box. Also I'm thinking a 4" wide port. The box is roughly 11" high by 14" deep by 37" wide. With .75 thickness mdf. Would 4" be to wide for my port? Any further help is greatly aprretiated but I'm trying to break 140 tired of these 30s plus I see scores where guys have like 2 15"s only hitting 143 I'd like to show that 12" off to the world haha.*

Thanks let me know

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[RangerDangerV2 5,000+ posts]

why are you making 5 threads about the same topic??

 

[IonRL205 10+ year member]

Theres something wrong with his other topics, the first post doesn't load up and theres an error in the top left corner.

 

[REDz28 10+ year member]

yea sorry computer went crazy and frozen up but would only freeze when i tried posting. of course i wouldnt do this on purpose. but ok so would 3x 3" aero ports be good for this set up?

 

[akheathen Premium Member]

i would go close to 12-13"sq per cu-ft. i also favor sub firing to the side with port rear over sub up, just make sure you leave decent clearances for both, and no cargo is going to damage the sub face.

 

[REDz28 10+ year member]

i was kinda leaning towards sub up, 6" aero port with 10-11 in length including flare. this will be directed to the furthest rear corner on the drivers side. but i want this box to not only get high numbers above 140 atleast i also want it to be a daily use box. let me know what you guys think and possible options