Can I please break a 147?

5k i meant but im sure you already know that if you know your rise.
The box I'm using now has a ton of rise but it was designed as a daily box. It does its job well. I just want to find that fine line between good daily and good meter. I will more then likely use my current box daily unless the rebuild works really good.

 
My Scion formed the most pressure @ 32-34hz open windows, 44Hz sealed. Had no problem putting up mid 40's @ 24Hz with a v2 hdc3-15a on an rd 3250, would do 148@34 and, anything above 44 was soaked up by its damping to much to put up good numbers. Bos was 4.5@30 with 56sq" of port, sub up (centered in air space) port rear on passenger side, mic'd in driver seat @ headrest.

 
I'm about fed up trying to put up a decent number with daily tuning. Next idea since I can't fit 15s and a single 18 might not work. Single 6 inch flared aero, tuned at 34, 17 inches total. Box will be 3.2 net after port subs and bracing. Subs up in the back corners, port firing out the back in the center about 8 inches from the back of the car.

Opinion? I'll post a pic of the current box in a minute. It's 3 cubes net tuned at 31hz. 54sq inches of port, 18 per cube. It did a 145 sealed up at 46hz.
All it takes is one good sub and one good amp //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif


 
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