Press Release

Load Sensitive Fuel Pressure for Carbureted Engines

Thomasville, NC - Race Pumps Billet Fuel Pressure Regulators are now available with a “Load Sensitive” feature. Fuel pressure is deceased at idle, high RPM off throttle, and anytime the engine has intake manifold vacuum. This simple feature delivers a fuel pressure map similar to computerized Engine Management Systems.

Carburetors often require 7 – 12 PSI to operate properly when the engine is under load, these same carburetors don’t function well at idle, high RPM off throttle, and low load at these higher fuel pressures. Fortunately the engine gives us a simple signal that it’s not under load…..intake manifold vacuum. The engine has no intake manifold vacuum when it’s under load and has maximum vacuum when it’s not. The vacuum is even reduced proportionately under partial load (cruising). The perfect signal!

The new “Load Sensitive” Race Pumps Billet Fuel Pressure Regulators feature a vacuum reference port that is connected by a 1/8” vacuum hose to a port on the carburetor base plate, carburetor spacer, or the intake. Fuel pressure is reduced proportionate to intake manifold vacuum…….1:1. Fuel pressure is commonly measured in PSI (pounds per square inch) while intake manifold vacuum is measured in in.Hg (inches of mercury), 1 inHg is approximately equal to -.5 PSI. 10 inches of intake manifold vacuum will thus decrease fuel pressure by 5 PSI.

A simple solution to a complex problem.

For more information on Race Pumps’ line of Bulletproof Fuel Systems visit RacePumps.com or call 336-476-9583