for Part Number 5040 Fuel Pressure Regulator for Carburetors (7-15 PSI)

Lightweight Ceramic Valve, Hard Anodized Billet

250" Orifice For Smoother Fuel Pressure at Lower Demand

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 1/8” barbed fitting may be used as a vent by installing a short piece of vacuum hose to a clean/dry area.

Plumbing the 1/8” barbed fitting to a vacuum port below the carburetor base plate will reduce fuel pressure at high RPM off throttle conditions (corner entry). This will make the engine “cleaner” when you pick up the throttle on corner exit. Idle pressure will also be reduced.

The socket head set screw on the top of the regulator adjusts the fuel pressure. Screwing it in increases fuel pressure, out decreases fuel pressure. Set the fuel pressure with the vacuum hose disconnected. Most carburetors work well with 7 PSI on gasoline and 9 PSI on methanol.