Power plate

Apparatus for reducing and minimizing the effects of shockwaves and pressure differentials occurring in an intake manifold of an internal combustion engine, said engine having a combustion chamber communicating with the intake manifold and a carburetor, said carburetor having air passing therethrough to receive a material amount of fuel, all of which flows to the combustion chamber, the apparatus comprising:

• a plenum chamber means disposed intermediate adjacent spaced portions of the intake manifold at a location between the combustion chamber and carburetor and communicating directly with the intake manifold for absorbtion of shockwaves and pressure differential passing through the intake manifold,
• said plenum chamber means including a first and a second plate, said plates being generally concentrically disposed about and having annular sections extending radially outwardly from the intake manifold and forming a circumferential chamber in said annular sections in communication along its inner circumference with the intake manifold via a slot, the first plate forming one side of the circumferential chamber having a contoured recess containing said slot comprising a curved surface in a direction facing away from said combustion chamber and the second plate forming an opposing substantially flat side of the circumferential chamber, the first and second plates being secured together and to the respective adjacent portions of the intake manifold in a generally air tight manner with said first plate being located between said carburetor and said second plate so as to enhance said absorbtion during back flow.