Re: review and correct my porting tutorial please
I am not the greatest at explaining things, so I will try to be brief. While reading you wrote the the port opening (mouth) should be half the area of the sub. Though it looked more like you meant the over all port volume in the pics and then more or less backed that idea as you continued your tutorial. I think some rewording may make it easier especially for a noobie. In my designs and even some of the MFG specs the port mouth has been close to 1/3 of the overall surface area of the sub which leaves the port several inches longer than the sub and keeps the air pressure low enough not to need worrying over port noise caused by too small of a port..
I hope that said what I mean since I have barely finished a cup of coffee this morning.
Your friendly neighborhood subaru freak!