Lightweight Ceramic Valve, Hard Anodized Billet, .250” Orifice
The Race Pumps fuel pressure regulator installs between the fuel pump and the carburetor.
The lower port is -8 AN O-ring, this is the inlet from the fuel pump.
The side ports are -8 AN O-ring, these are outlet ports to the carburetor. You may use just one or both of these ports.
The -4 port on the side of the regulator is the idle bleed. This line must be returned to the fuel cell. This reduces the fuel pressure at idle by 1-4 PSI. It accepts a standard Holley jet. The Race Pumps regulator damps out the pulses normally seen in a fuel system. This allows the carburetor to idle at higher pressures than fuel systems without the Race Pumps regulator.
The -3 port for the boost reference is also the pressure adjuster. Screwing it in increases fuel pressure, out decreases fuel pressure. Set the fuel pressure at 1500 RPMs with the boost reference disconnected. Most carburetors work well with 7 PSI on gasoline and 9 PSI on methanol.