Under High fuel demand or when G-force loads are high, the bypass loads the pump and the pump steps up to give the fuel line those pressure increases needed to keep your carb or nitrous fuel pressure rock solid. BUT, when G-forces or fuel demand is low... like when you slow back down or are driving around, the return style system takes the load off the pump. This layout reduces wear, eliminates heating/boiling of the fuel, simplifies plumbing and reduces battery draw.
- Out of stock
THIS UNIT IS CURRENTLY OUT OF STOCK Part # 8804-C If you are looking for a fuel pump that will feed big power AND is easy to plumb. Our #8804 fuel pump and regulator combo does the trick. This is a carefully selected combination of parts designed to eliminate the high side pressure design fuel systems. These antiquated layouts simply wear the pump out, heat the fuel up and drain your battery. Our #8804 Fuel pump and regulator combo operates on a return setup. This greatly increases pump life and greatly improves fuel pressure accuracy. 
Part # 8805 If you are looking for the most consistent fuel pressure with minimal pressure drop under a load, you need to use a Bypass regulator.This regulator is setup to be used with our Vacuum operated regulator system on our carbs that offers a variable fuel pressure (typically 3-7 psi at idle and 10-11 psi downtrack)BUT it can also be used for steady fuel pressure requirements.The regulator is a simple hook up and go setup that can be plumbed in many different ways.Includes 3 -8AN fittings as shown.Check out our 440 Fuel pump page (in our Racing Parts section) for various plumbing diagrams for the 8805 regulator.Note: Is designed for fuel pumps 450gph or smaller.
This high flow regulator has been modified by PRO SYSTEMS to work with our valved vacuum setup on our carburetors. You simply hook a vacuum hose from the regulator to the special port located on our carburetor. You will now have fuel pressure control to allow you pressures in the 3-7 psi range at idle and 10-11 psi at wide open throttle! This is employed for high powered carbs on gasoline, Ethanol (E85/E98) and alcohol carburetors. Note: It will not work on carburetors not machined/designed for this setup.