Carburetor scoops do they make a difference?

We did an experiment on my 70 Dart for fun years ago. We taped little pieces of yarn all over the hood to see exactly where this big hole was going to get cut. After driving at all speeds... well. I never cut the hole. I'm not saying they don't work. But from what I saw... it was bad. Some of the yard pointed forward about mid way up the hood. It was very strange. That will take you a few minutes and a drive and you will think twice. I think cold air is the difference... not ram air. Many people think that scoop really rams the air. It's very turbulent plus it may even make a low pressure area in front of the scoop where the air jumps up over the hood leading edge. Try it. You'll see.