thegr8cody Posted June 8, 2014 Report Share Posted June 8, 2014 I have a truck box that is .95 cubic ft. Ive heard 1lb polyfill per cubic ft is what most recommend. Does anyone know about what percentage it adds. Ive heard from 15-30%? 1998 gmc sierra h/u:eclipse cd3200 sub:dd9518g d1.5 amp:jl e300/4 sub amp:dd m2a front stage:id ctx65cs dc power 270 alt lots of kicker 1/0 Link to comment Share on other sites More sharing options...
OldsBoomer Posted June 8, 2014 Report Share Posted June 8, 2014 Only one way to know how much you'll gain. Do it. Its cheap Suburban Coming Soon Link to comment Share on other sites More sharing options...
thegr8cody Posted June 10, 2014 Author Report Share Posted June 10, 2014 Well i was wondering if there was a way to calculate. Ive read that 1.5lb/per cubic ft in a 3 cubic ft yields 30% increase 1998 gmc sierra h/u:eclipse cd3200 sub:dd9518g d1.5 amp:jl e300/4 sub amp:dd m2a front stage:id ctx65cs dc power 270 alt lots of kicker 1/0 Link to comment Share on other sites More sharing options...
philrab Posted June 11, 2014 Report Share Posted June 11, 2014 Well i was wondering if there was a way to calculate. Ive read that 1.5lb/per cubic ft in a 3 cubic ft yields 30% increase I've heard 1 lb/cu ft. Only way to know for sure is trial and error. 2015 Toyota Tacoma Build Thread 2007 Mazda 3; 5000K HID's, Kenwood Excelon KDC-X997, Infinity Reference 6.5 comps in front and coaxials in the rear doors, JL 320.4 four channel, Rab Designs built ported enclosure with an SA12, Kenwood monoblock, Redline Leater shift boot/e-brake boot/center console cover, JBR short shifter/shifter bushings/rear motor mount. Build Thread 1996 Mazda Miata: Kenwood Excelon HU, Alpine speaker in the doors, Clearwater (miata specific) headrest speakers. 1994 Mazda Protege: Kenwood Excelon HU, Infinity Reference 2 ways all around, 2x RF Punch 10's in ported boxes. Link to comment Share on other sites More sharing options...
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