Reply to "Weber air filters"

The phenomenon described above is not unique to Webers and is called reversion. It is typically exaggerated by high overlap cam profiles. A similar event happens at the converging point of exhaust headers. Merge collectors help minimize that.

Properly sized air filters cause minimal negitive back pressure (restriction). On the engine dyno my Weber equipped engine experienced no power loss with a well designed air filter system. The problem is that the space above the Webers in a Pantera is limited. The top of the air filter needs to be minimum 2.5~3 inches above the velocity stack opening and the air filters need to be properly sized. Agreed, stacks are the coolest looking. Nobody wants to mess with the aesthetics.

There were many factory Weber equippped and aftermarket Weber equipped road cars on the street in past years. Not so much now. I don’t remember any fires directly caused by air filters. Could just be an age thing though.