Air filter on webers

[bobcowan]

Originally Posted by zrayr

your testing with the wool thread, while admirable, has led you to the wrong conclusions. The rear end of hood scoops, just forward of the windshield has long been known to be a high pressure area.

Z.

Yes, and no. The high pressure area has always been at the base of the windshield. And that means the small area right at the base. It's not a very big zone. On an older Mustang, that would be at the cowl vent area. As you move further away from the base, you lose that small high pressure zone.

The yarn test is pretty accurate and doesn't lie; where the yarn goes is where the air flows. It show that the back of the hood scoop on the Capri is probably feeding that high pressure zone.

Look at the cowl unduction hoods on a Camaro that's designed to work, and not just look good. The opening is moved back as far as possible to get it into that zone, and still allow the hood to open. If you wanted to take advantage of that high pressure zone on a Cobra, you'de have to get your air from the same place. Extend the air cleaner back, and create a new opening at the cowl; or extend the rear opening hood scoop back to within a few inches of the windshield.

Look at the air cleaner set ups for a cup car. It actually gets all it's air from the cowl area, directly at the base of the windshield.