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 # VIDTUNING 101This video teaches you the important tuning information you need to know to properly:Adjust your carburetorAdjust your air bleedsMake main jetting changesRead spark plugsSelect and read fuelsAnd more...
Part # PN7785 If you have an SV1 and want to install an air cleaner our Billet air cleaner bracket makes the install easy. Its strong too, cycled over 1000 times with a 100 lb. load without failure. The bracket extends up and away from the venturi to allow incoming air to fill and straighten. $24.00 includes mounting hardware.
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.
Part # 7742 The SV1 keeps getting better and better. Fresh off the win at Hot Rod Drag Week, Dual SV1's powered the fastest Naturally aspirated car to ever win the event. The SV1 then won a heads up shootout against the best in the business in a independent dyno competition. Well a new development in boosters for the SV1 has entered the arena. If you have a real tight converter and your car leaves real lazy or worse yet, you cant even get the car to jump up on the converter when you stomp it? We got the answer. Are you looking for more torque and a carb(s) that will instantly jump to the chip when staging? Our SV1's are now available with Power boosters. Our new SV1 Power boosters massively expand the low rpm fuel cone and they incredibly strengthen low speed signal for improved low rpm atomization and instant response to throttle movement and shift recovery. These things are wicked!! Available now for all model SV1's. $29.00 per booster (2 per carb required).
Part # PN 7790 Simplify the installation of a Wide open throttle switch on your SV1 with this heavy duty bracket and Micro switch.
Part # 7111 **Available now as an upgrade for all Pro Systems 4150, SV1 and Dominator carburetors. $79.00 per block.
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.
Part # SPK1 Stop guessing! This is the best scope available for reading spark plugs. We're racers, so we even upgrade this one to have a super white light to make locating porcelain heat, timing marks and misting even easier. You say you don't know how to read all the information a spark plug provides? Well, you will now. Our tuning video is included. This video gives you an intense series of lessons in reading spark plugs and tuning your engine. You will watch this video over and over. Now you have the knowledge and the equipment...go tune that engine! Check out this link regarding reading spark plugs.
Part # P7765 The Mach 2 Phenolic Shear plate for 4500 series intake manifolds is 1/2" tall. If you are mounting your SV1 on a 4500 series intake or Dual carb intake, the Mach 2 is just the ticket for maximizing power and throttle response. The Mach 2 is designed for the 110mm blade equipped SV1 to increase horsepower, improve low speed signal on low signal engine programs, increase throttle response and drastically improve part throttle signal generation. PLUS its phenolic so it acts as a heat insulator as well. A typical 700-900 h.p. engine will consistently show a 7-12 h.p. gain when employing the Mach 2 Shear plate.
Part # P26158 Fuel Lines, designed for Holley Dominator and SV1 series carburetors, feature braided -8AN inlet and -4AN fitting for a fuel pressure gauge.
Part # P26156 Fuel Lines, designed for Holley dual feed carburetors, feature braided -8AN line with a -4AN fitting for a fuel pressure gauge. Fuel line is 9-5/16” center to center.
