This has worked perfectly for 15 years with zero failure. THE APD DIAPHRAGM BYPASS REGULATORS ARE COMPACT LIGHTWEIGHT UNITS DESIGNED TO REGULATE FUEL PRESSURE WHEN USING AN APD MECHANICAL FUEL PUMP #6100 OR OTHER AFTERMARKET BELT DRIVE FUEL PUMP. Black. If the injectors are below the throttle blades (as in a multi-point EFI system), then you should connect the vacuum/pressure port . Carbureted Regulator. This is a return-style fuel kit. Can a car run without a fuel pump? 5 psi. THE APD REGULATORS FEATURE A BLACK ANODIZED FINISH, WITH 3/8 NPT INLETS, A #8 AN O-RING OUTLET, AND A 1/8" NPT FUEL PRESSURE GAUGE PORT. What you see is what you get in the photos. I assume because its easy to set and monitor the pressure. Using a fuel pressure regulator for carburetor with bypass capabilities is another way to adjust fuel pressure for carburetor applications. PART #: HOL-12-804. The bypass regulator will work fine as it will allow cool fuel to enter the carb and keep it from boiling in the carb. You can do a diy says and restrict the return line but IMO you are better off feeding one side of the regulator to each carb and not returning fuel. Regulator comes in four different pressure ranges covering applications between 4 and 80 PSI. For sale is a Barry Grant 4 Port Fuel Pressure Regulator with all the necessary AN Fitting and Caps. Quick Fuel Technology 30-900QFT Quick Fuel Bypass Regulator. 5 - 9 psi; preset to 6. The hose barb on the left side of the black section is the "output" that is only functional when the pressure exceeds the set valve pressure. INSTRUCTION Sheets. Some car models have the fuel pressure regulator in the fuel tank near the fuel pump, and this will cause it to be much more difficult to reach and replace. -NEW-Five - port Bypass. This kit is not recommended for pumps that flow over 255 LPH. Carb Bypass Fuel Pressure Regulator will sometimes glitch and take you a long time to try different solutions. The real is the weight of the fuel in the fuel line. Hope this clears things up a bit. Free Shipping; $250.30. Opening and closing of the bypass valve is limited by a spring (D). Oil/fuel bypass regulator complete #9570, $ 129.00, Oil/fuel bypass regulator complete #9570, Add to cart, Categories: All Waste Oil Parts, By-Pass Regulator, Lanair Parts, Description, Additional information, Reviews (0) Description, Oil/fuel bypass regulator complete #9570, Fits all Lanair models. It opens and closes to adjust properly to allow for an even and steady fuel delivery. Estimated Ship Date: Today. way. Also included in this kit is the plug so the regulator can be plumbed before or after the engine. The original inlet becomes the return outlet and the original outlets connect to the carb and fuel pump. Hey, Swapping from a MSD Atomic system to Proflo 4. Aug 24, 2018 #6, Cope Fusing with fire FABO Gold Member, to use it backwards as a bypass regulator. 12-804 Holley Chrome Carburated Fuel Pressure Regulator . This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations. Description. Fuel from the fuel pump flows into the inlet and exits the outlet of the regulator to the carburetor or fuel injection system. No bypass, from the regulator to a fuel block (with psi gauge before the block) from 4 way block to each bowl on the dual 750 Holley 4150 carbs. The only catch i can think of is that it would not work as well if you had 2 tanks. With the bypass capability over 5 GPM at 5 PSI, this regulator can handle blow through carbureted applications well over 1800 HP, and for EFI applications using belt driven fuel pumps; even further (with a flattened regulation slope). Select a store to see pricing & availability Material: Aluminum. 130+ GPH pumps are available when maximum fuel delivery is desirable. Select a store to see pricing & availability Compare. Fuel Pressure Regulator confusion. PRODUCTS . Quieter fuel pump operation. Bosch Fuel Pressure Sensor . Finally, it flows to the fuel bowls or fuel rails. The regulator is adjustable in pressure from 35-90 PSI. For example, you can use the inlet as the outlet and the outlet as the inlet with no negative effects on the fuel pressure regulator operation. 1/2" i. Fuel Pressure Regulators, Fuel Injected, Carbureted, Service Kits, Pro-Series EFI Regulator (No Fittings) SKU: 13145, A1000 Carbureted Return Style Regulator, SKU: 13204, A1000 Injected return style Regulator, SKU: 13101, A1000, 4-Port Carbureted Return Style Regulator, SKU: 13224, A1000-6 Injected return style Regulator, SKU: 13109, 1.70 1.425 .420 in. So the, flow would be even less than the 7/32" hole could possibly pass. 3/8" inlet and outlet ports are utilized and, with fuel shut-off pressure in the area of 6-1/2 - 8 PSI, a regulator is not required. A bypass-regulator can also react much quicker to sudden fuel flow changes and correct a potential lean condition before it's too late. 100% agree - Would recommend. Free Shipping. Both items are in great condition. What is a bypass fuel pressure regulator? BG wants the larger return line because the fuel isn't under as much pressure on the return side of the bypass regulator. You basically gut the regulator and use the diaphragm and pressure spring to control the bypass. $150.90 New. $142.99. The range is, however, perfect for most of the vehicles out there. Part #: 12-841 Line: HLY. AVAILABLE IN TWO . With a bypass style regulator, fuel enters through the inlet port (A) and travels past a fuel bypass valve/fuel return line port (which governs fuel flow and pressure) (B) and then is distributed through an outlet port to the carburetor (C). This second fuel pressure regulator from Holley ranks number 4 on the list of the best fuel pressure regulator for carburetors. LoginAsk is here to help you access Carb Bypass Fuel Pressure Regulator quickly and handle each specific case you encounter. Apr 8, 2013, #3, The regulator is a simple hook up and go setup that can be plumbed in many different ways. $129.38. Base fuel pressure is adjustable from 40-75psi. Aeromotive 13129 Mustang EFI Bypass Fuel Pressure Regulator (9) Total Ratings 9. Decreases pump noise and increases pump efficiency compared to dead-head style regulator. Full deadhead system. As far as your gauge, I believe your intended operating pressure should be in the middle of your gauge scale, so for a carbureted application you would want maybe a 0-15 or 0-20 psi. All FUELAB regulators are machined from 6061-T6 billet aluminum, hand assembled, serialized, and come with a 2 year limited warranty. A bypass regulator creates pressure by restricting flow from the pump, forcing the pump to produce pressure up to the regulator's set point. Dimensions. Reviews, Only registered users can write reviews. More Buying Choices, $173.94 (23 new offers) See Emissions Details, We Suggest, quick fuel, Billet Regulator Manifold 4 Port, $135.86, Part# 30-4QFT, Eliminates "creep" at low RPM without affecting fuel flow. The pump feeds the regulator side high pressure. A 1/2 has more weight and volume that the 3/8 line. Furthermore, you can find the "Troubleshooting Login Issues" section which can answer your unresolved . Weldon A2040-281-A-200 adjustable fuel bypass regulator, Malossi 360 intake manifold, Malossi VL13, Marchald Double Layer Fusion pod filter, Castrol Power RS TTS, 20mm throttle body mod, Malossi TC unit, 2013 SR 50 HGT 86cc build in the works, 09-19-2013, 06:12 PM #5, Dubb, apriliaforum prov-nov, Join Date, Jul 2013, Location, Canada, Posts, 72, We have packaged this regulator along with the ORB to -6AN adapter fittings needed to run -6AN fuel line. Designed only for carburetor use. Re: Bypass fuel regulator. Size: -06. 375" 3/8" restriction. Fuel Pressure Bypass Regulator, X1 Series, 0.313 in. Add to Cart. Any excess pressure, and unused fuel is allowed to return to the tank. Boost reference port available for forced induced setup- raises fuel pressure 1lb Each lb of boost (1:1 ratio) Note- boost reference port should be left unplugged (atmospheric) if setup is naturally aspirated. This regulator comes from the factory with a .040" idle bleed jet. Most quality fuel pressure regulators have a bypass returning fuel to the tank. $120.89 Used. As Al noted, the return bypass regulator on the post side of a fuel log/rail maintains fuel pressure as a function of the return (which is one of the reasons why it's important to have a relatively large return line on high pressure pump applications), maintaining open flow to the pressure set at the regulator - this is how I ran my system in . Fuel Pressure Regulator, TFX, 3-60 psi, Black Anodized, Carburetor, MFI, Gasoline, Each. Note: -6AN is .294", -8AN is .392" inside diameter. Engine Hp: 2,000+ at 28psi. I replaced the 12-841 regulator with a 12-803 non-bypass regulator. How does it work? Quick Fuel Technology - Compatible for use with gas, alcohol and E85 fuels. Holley 12-841 4.5-9 PSI Adjustable Bypass Billet Fuel Pressure Regulator. Weight. Conclusion, Mr. Gasket Fuel Pressure Regulator Kit . Add to Wish List. Large (.375" diameter) internal orifice reduces flow restriction. In the real sense, there is no . Once enough pressure is created the regulator bypass is forced open, allowing excess flow onto the return line. Features: Adjustable fuel regulation from 4-1/2 to 9 psi, Preset to 7psi, 3/8" NPT ports (1 in, 1 out, 1 bypass or return) Used in systems with a return line back to the fuel tank, Quieter fuel pump operation, Designed only for carburetor use, The stock regulator has a .174" (.184" in Accufab one) id in the stand pipe that ALL the returned fuel must pass through. When the boost is applied to the top of the regulator, then the diaphragm that is attached to the bypass valve is forced down by a spring to reduce excess . You would have to do some testing to get the right amount of fuel back to both tanks and it would require some extra plumbing to make it all work well. Seat, 3-20 psi, Black Anodized, Universal, Each. But check out if the range is enough for your . Part Number: TFS-27001. $97.00 (38 new offers) Edelbrock 174133 Fuel Pressure Regulator Bypass Style 160GPH Black, 10, $13795, Get it as soon as Mon, Aug 29, FREE Shipping by Amazon, Only 5 left in stock (more on the way). This is because most carburetors only require around 6 psi to operate. I blocked one of the outlet ports on the 12-803 regulator and checked fuel flow - strong. Willy's Bypass Fuel Pressure Regulator. Opening and closing of the bypass valve is limited by a spring (D). Bypass design eliminates pressure creep and vapor lock. Capable of supporting applications up to 1000 HP, the 13129 EFI Bypass Regulator can handle high-flow EFI fuel pumps and the most aggressive street machines; especially those looking for a cleaner, lighter solution where performance is critical or where space is a premium. I usually see them mounted in the engine compartment. MP-9945-BLK. An EFI fuel pressure regulator, or fuel pump regulator, as it is sometimes called, features bypass capability as well. Part #: 2015KIT Line: MRG. 3/8" npt ports. - Features a removable holley jet to taylor your idle pressure and external adjustment for top end pressure. NOTE: P/N 12-842 is a bypass regulator with idle bleed jets intended for use with drive belt or high pressure alcohol fuel pumps. 100% agree - Would recommend. Kit Includes: 174053 Carbureted Bypass Regulator, R670840 -6 ORB to -6AN Adapter Fitting, R670650 (x2) -10 ORB to -6AN Adapter Fittings, 4.Holley 12-841. These regulators are also called "bypass" regulators. The stock fuel lines neck down to .253" in five (5) places before it gets into the fuel rail. The 3/8" aluminum tubing works well, but you will need a flaring tool and bending springs to fabricate the lines. Can't tell you which way is better, but there is an advantage to putting the reg AFTER the carb -- good fuel circulation. Sep 1, 2021. Part Number: AEI-13304. My question- could you install the regulator in the rear say you had the acess to read the gauge and . Adjustable from 4. The bypass fitting and hose allows that fuel to return to the tank. ( 6 ) Estimated Ship Date: Today. Placing the regulator after the carb is easy -- fuel supply to one end of a fuel log, fuel to the regulator and return line on the other end of the fuel log. 6 pounds on the regulator. While it may be possible, what I found inside was a, diaphragm and a spring and check ball. Any excess pressure beyond the 15-20 psi that the valve is set for, will "bypass" the valve in the black section and RETURN (to the left) back to the fuel tank. MP-9633-BLK . A 3/8 line has more fuel by weight and volume as the same length of 5/16 line. 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. :thumbsup, "110 GPH pumps are designed for street/strip applications where substantially higher than stock fuel delivery requirements are necessary. KSC2005 KSE BILLET BYPASS FUEL REGULATOR . Reply #1 on: December 31, 2009, 12:14:22 pm . Note I am also experimenting with another idea - this might alleviate the need for a bypass regulator after the carb feeds. The short answer was succinctly put by our friend David Page at Fuel Air Spark Technology . Check out our 440 Fuel . As the line from the pump to the carb gets bigger, you have to overcome the weight of the fuel in the line, or it will stand off. The BLP regulator features a spring-loaded poppet valve that is calibrated to produce a smooth fuel pressure curve. The Holley 12-803BP fuel pressure regulator features 3/8" NPT in/out ports and a 3/8" NPT return port. $23.77 New. Free Shipping; AEM Electronics High-Capacity Fuel Pressure Regulators 25-305BK. Braided hose is easy to run and route, but is much more expensive. The above setup will provide about 20 PSI regulated fuel flow, AND will AUTOMATICALLY open up to allow full fuel flow to bypass the setup if the pump fails! If you are going to return fuel you need to make sure you have about 15-18 psi in the number 8 line to the regulator or it will run out of fuel. Includes 3 -8AN fittings as shown. I will sell it for $100 if interested. For use with electric fuel pumps only. as long as the return line cannot get submerged inside the tank you are fine.they say that because if the return gets submerged it takes more presure for the fuel to return to the tank.possibly causing back presure in the system.for optimal operation the return line should be the same size as the feed for the same reason. Instruction sheets . - Anodized billet aluminum construction bypass regulator for gas or alcohol. But the orifice the fuel can flow through measures only, 7/32" and is obstructed by the check ball on one side and the diaphragm on the other. July 23, 2022 by Marc Reynolds. Requires a return line from the regulator back to the fuel tank/cell. Here are the elements, in order -, 1) mechanical fuel pump, 2) fuel pressure regulator - non bypass style, 3) fuel filter, 4) carburetor feeds, Once the pump builds max pressure it bypasses somewhere to keep from burning the pump up. The finished assembly looks like this: Amazon.com: bypass fuel regulator, 1-16 of 273 results for "bypass fuel regulator", RESULTS, Holley Performance 12-880 Adjustable Billet By-Pass Fuel Regulator, Black (12880) 20, $17395, Get it as soon as Wed, Aug 17, FREE Shipping by Amazon, Only 1 left in stock (more on the way).