aero port displacement question

[vw passat]

hi guys if im going to make 2 aero port of 6'' each i need to add some displacement for them?

tx guys

[Jessica]

pi*r2 * length

Only figure length to whatver is inside the enclosure, if you have external port it doesnt count towards displacement.

3.1415 * (3^2)

28.27 cuin per inch of port per aero port

doesnt factor in thickness of port wall but will be close enough.

edit i think the wall are 3/16" thick or something so you could convert that to decimal and then do the math if you want to get perfect. The flared end will be just a bit more displacement than the tube but not enought to really worrry about.

[tacomaguy1]

Displacement is what he said then divided by 1728

So a 6" Aero that's 10" long

3.14 x 9 x 10= 282.6

282.6/1728 =.16 cuft for displacement

I think lol

[vw passat]

so for 2 6'' port i need .16ft^3 displacement? tx guys

[tacomaguy1]

No, I was using that as an example

Its going to be different depending on the length.

Longer will have more displacement and shorter will have less

[vw passat]

im going to have 13'' long

[vw passat]

i didnt understand how it works for the displacement so i need 2 6'' port 13'' long how much i need displacement?

[vw passat]

someone help me pls i need to know for 2 6'' port how many displacement i need in ft^3? tx guys

[tacomaguy1]

About .45 for both

[TheBetterMethod]

.42