[CobraEd]

The concept of anti-reversion makes sense to me. When that intake valve slams closed at high rpm, the reversion wave can go back up thru the carburator instead of resonating in the intake manifold and actually causing an increase in flow velocity at the other ports. This is the essence of designing a well "tuned" intake manifold. It is not only about flow. This plate helps keep the resonence in the manifold, and not backing up into the carb. Webers have a haze of fuel/air mixture over them at high speed because there is no tuned plenum manifold to use the reversion for increased power. So when the intake valve slams shut, the reversion goes back out the carb bore and caused a gas haze. That is why Webers are bad for top end rpm horsepower.

http://www.magnafuel.com/products/ac...ates/index.htm

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