Vent size

[inrank]

Are there any differences in port size (diameter), shape and number?
(if they are all tuned to the same freq as below...)

An externally hosted image should be here but it was not working when we last tested it.

So one big one (100mm) vs two smaller ones (60mm) vs a slot version

Thanks

 

[leadbelly]

Your question seems to be answered by the balance of your post. What are you really asking?

 

[inrank]

sorry, re reading it, makes no sense.

I meant to add, does it make any difference with the types of vent? air flow/'chuffing'/noise etc...

 

[Ron E]

Generally the lower the velocity, the better. I wouldn't trust the vent mach calc in winisd beta. If those vents are all tuned to the same frequency then the shortest vent has the smallest area and should have the greatest vent mach. Winisd pro alpha is a bit better. Unibox (requires Excel) is better than either, IMO.