Originally Posted by Gordy
OK, here is my attempt
All this did was to move the roar from around 75-80 MPH down to the 65-70 MPH range.
I may try opening the holes more.
Gordy, I know this is a bit late, but just holes may not equalize the air pressure. I have seen others use a NACA duct style pattern cut to help the air flow. Ricky did that a few years ago and posted about it.
Here is a stock photo of an after market NACA duct. I have seen tiny ones around someplace.