port area / sq ft for pcp ports

[Alex K]

Does that rule still apply since its not a slot? I have 2 3" by 7" pcps from parts express, that'll tune it to 33.6 hz, but its only 4.25/ ft of port.. box is 3.3 cubic ft for 2 12 xl's... Also, is it cool to run 2 saz 3000s to 2 xl's? Or would I be better with 2 lvl 4's with a 2 saz 1500's

Edited September 24, 2010 by Alex K

[Torres]

general rule of thumb for aero ports is 9-12 sq inches of port per foot

[bassl0va]

You'll be louder with the XLs and twice the power.

[Dub7Banger]

I wouldn't use PCP to make a port, the police will get ya for possession of narcotics.

[OBI]

I thought the port area was the same as a slot port, unless the aero was flared?

[bassl0va]

^yeah. Just because it is round doesn't mean it is less prone to port noise. So if it isn't flared it stays at 12-16"s.

[Namosh]

^yeah. Just because it is round doesn't mean it is less prone to port noise. So if it isn't flared it stays at 12-16"s.

The way I understand it, a round port more effectively uses all of it's area. In a slot port, the area near the corners doesn't allow as fluid of air flow. That is why more area is suggested for square than round ports.

[bassl0va]

^makes sense, but no matter what shape the port is, edges are always going to make it more prone to noise.

[Robert8252]

1) second time you mentioned drugs as a port.

2) go here http://www.psp-inc.com/tools.html

The numbers for port are dead on to doing the math on paper. I don't know how to figure flare length but they usually just have 1 extra inch added in length

Edited September 25, 2010 by Robert8252

[Robert8252]

And you need more port. And your number are off. 33hz in 3 cubes would need minimum 3-4 3" aeros over 20" long

And the XLs in 3k will sound a lot better