Abstract: An automatic thermal pressure regulator and balancing system adapted for use in an internal combustion engine having a fuel supply conduit connecting a fuel supply and a carburetor. The regulator includes a hollow housing interposed with the fluid supply conduit between the fuel supply and the carburetor. A metallic tubular member is disposed within the housing and includes an inlet disposed in fluid communication with the fuel supply conduit and a pair of outlets communicating with the interior of the housing. A heating element is mounted within the tubular member for heating the fuel flowing between the inlet and outlets of the tubular member. First, second and third co-linear chambers are formed within the housing, with the first and third chambers filled with a metallic mesh material and the second chamber filled with a catalytic agent material reactive with the fuel.