2x SMD 18's box help

[shaker1 0]

hey guys have 2 18" smd subs, have xtra cab f150,trying to do NW have 20d x 24h x 57w so i have 11cuft = 5.5 per sub,trying to get into the 50's but i cant seem to get there, any help appr.I have interchangeable port spl port 17x 13 thats the biggest i could fit, subs up on passenger port up on driver,double 13 ply birch all of box,running stetsom 7k2d 4xs power batts (2700's) 1 h/o alt ohio gen.4 runs 0 gauge 2 pwr 2grnd to the 3 batts in rear,should i just go for the wall? i'd get about 20 cu ft. SSNW1-2. ANY HELP THNKS

[S.DeYoung 967]

Wall it or get a bigger vehicle. BanginGMC on here has two 15 SMDs in a S10. Talk to him about box design, it looks like he is putting up some big numbers.

[shaker1 0]

yes ive seen his on youtube he had his built looks like for music i think they mention low freq tuned,

[ford302redneck 15]

150s shouldn't be a problem.

I'm not a fan of interchangeable ports. If you want the option to change port length, go with aero ports. 4 6"s would work.

[shaker1 0]

ill try those out isnt that half area as my spl port i have 221,4 6" aero are about 114