ShadeTreeMechanic Posted November 8, 2017 Report Share Posted November 8, 2017 Welcome to SMD! Total port area is what we need to look at. As stated by others, it depends on power and box volume. I am sure that @Triticum Agricolam is around here somewhere. He would be the one to ask. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
Dutch Holland Posted November 8, 2017 Author Report Share Posted November 8, 2017 4500 watt rms. I want to do areo port so I can change tune. But between 50 to about 37. 2.2 cubs Link to comment Share on other sites More sharing options...
WalledSonic Posted November 8, 2017 Report Share Posted November 8, 2017 21 hours ago, WalledSonic said: Yes it matters. You need to keep port velocity down. Try this: After you determine port area, determine port length to get the tuning. Just sayin. Chevy Sonic Wall (4) 15's on 10k Build Log https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/ (4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts Jeep Wrangler JK (4) 8's in a 4th Order Build Log https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/ IG @walledsonic Link to comment Share on other sites More sharing options...
rocking.that.eclipse Posted November 8, 2017 Report Share Posted November 8, 2017 It matters for your rise and how quick you fall off out of your tuning. Please someone correct me if I'm wrong. My idea was that if you were on the lower end of port area then you'd be able to play farther out from your tuning than if you had a larger port area and again this is just a general guidline won't hold true for everything Link to comment Share on other sites More sharing options...
WalledSonic Posted November 8, 2017 Report Share Posted November 8, 2017 14 minutes ago, rocking.that.eclipse said: It matters for your rise and how quick you fall off out of your tuning. Please someone correct me if I'm wrong. My idea was that if you were on the lower end of port area then you'd be able to play farther out from your tuning than if you had a larger port area and again this is just a general guidline won't hold true for everything Thats true but at the expense of high port velocity and port compression, limiting output due impedance rise, as you mentioned. Thats why Triticum made the port area calculator that takes power into account. Chevy Sonic Wall (4) 15's on 10k Build Log https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/ (4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts Jeep Wrangler JK (4) 8's in a 4th Order Build Log https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/ IG @walledsonic Link to comment Share on other sites More sharing options...
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