Worked well out of the box. 100% Satisfaction Guaranteed CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000 satisfaction guarantee the daily low price westernnorthndc.org, US $11.9 3000 501 Also services earlier models (1953 to 1964) using swinging drawbar: NAA 600 For Ford Tractors 2000 4000 (1965 and up) Jubilee . the cause for your fuel pressure fluxuation is because the fuel pressure is bumping up against the regulator and the extra fuel has no where to go , the quick fix is run a return line . 9 really is max. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. There is clearance around the needle which I would have thought would be enough to vent the increased pressure but maybe not. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Reviewed in the United Kingdom on January 31, 2016, Reviewed in Canada on January 27, 2023, Reviewed in Canada on December 18, 2019, Reviewed in Canada on November 10, 2020, Automotive Performance Fuel Injection Systems, Automotive Replacement Fuel Injection Pressure Regulators, Learn more how customers reviews work on Amazon, Holley 12-804 Reg, Fuel Press 1-4 Psi Pol. Depending on what kind of electric fuel pump you used you will need a regulator - or series of regulators to step down the pressure getting to the carburetor like a Holley 12-803 type at the very least. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. Copyright 2023, Antique Automobile Club of America. [endif]-->. Decrease pressure by turning the adjustment screw counter-clockwise. That is why fuel injection systems push usually 45 to 60 psi on the fuel at all times with a by-pass line - to keep it liquid and keep it moving - so it cannot turn to vapor in the lines. I like the attached simple explanation of the issue. I recently fitted an electric fuel pump to one of the cars. The higher the RVP, the greater the tendency to vaporize or vapor lock. The vapor lock issues that I have are with 1920's Packards where the fuel system is essentially at atmospheric pressure throughout. I have adjusted a 6-9 lbs pump down. Use with standard pump only -not recommended for maximum pressure pumps. Adjustable from 1 to 4 PSI. In some areas, according to the map, RVP can vary from about 7.0 to 9.0 in some of the fuels. I am having problems understanding why you say OD is wrong and Rusty is correct, it seems to me you are all saying much the same and that is that gasoline is made up of many components each having different boiling points and the components with the lowest boiling point are the cause of vapour lock. Average for the last 12 months. the installation of a Holley 12-810 oil pressure safety switch is recommended for installation into the wiring circuit. The BALL shuts off the fuel flow until the pressure on the other side of it lets fuel get past it to keep the pressure constant. Designed using state-of-the-art technology and with customers in mind. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Going to check my VW bus fuel pump pressure. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Some parts are not legal for use in California or other states with similar regulations. I can start my car instantly after sitting in a cool garage at about 75 deg F. Drive 30 miles and then park for 20 minutes. The following vehicles are considered Emissions Controlled Vehicles: *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. No mention of vapor lock issues, but engine de-carbon activities. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. here's one installed,same holley low pressure regulator, line pressure in the top, one side is hooked to the fuel pressure sender, other to the line going to the fuel block. Please try again later. . It is not intended to be sold or used for any other purpose. In the fuel use map in the Exxon or Mobil gasoline websites, there are a few places where the Reid Vapor Pressure spec is varied from other fuels. Please refresh and try again. Why does this occur only under increased pressure? Copyright 2023, Antique Automobile Club of America. You may receive a partial or no refund on used, damaged or materially different returns. For the best experience please upgrade or visit the site on another browser. [endif]-->. Join Date: Nov 2007 Posts: 22035 Share Tweet #2 Seems like the first "RFG" was closer to the old "winter" blend, which had more higher-end distillates so it'd vaporize nicely in cooler weather. I put it . . The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. on this design the adjusting screw all the way out should decrease the pressure the most - IF the ball valve will seat TIGHT, When I adjusted pressure below 30 - it would not seat any longer even with the adjustment screw all the way out. As the car is parked Temperature. and a rotary click style one here on the shelf pete, you are welcome to borrow them to troubleshoot your problem.. let me Know. All kinds of remedies were tried. => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. Ships from and sold by Performance Guarantee. LASTLY on your first issue of understanding vapor lock and boiling point. This Holley universal low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI. I have no idea - you are in uncharted territory. Refineries have been doing this for decades. It is a measure, as I understand it, of how readily the fuel will evaporate in open air. (see reg-setp.pdf), This is the same design as a Holley 12-803 or 804 knock off, so I looked up Holley's instructions. So they started putting more of the low grade gas, or high grade kerosene into the gas. . bowls after each run, just to see exactly at what temperature the problems become apparent. Shipping cost, delivery date, and order total (including tax) shown at checkout. A quart of diesel added to the gas tank solves the problem without any more in side effects than a slight smell from the exhaust. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. The reg takes 3/8" fittings and the gauge takes 1/8" fittings. Otherwise it's good. Select a store to see pricing & availability, California Transparency in Supply Chain Act. It does however produce an irritating fume that irritates the eyes and mucous membranes when burning in gasoline. There was a problem adding this item to Cart. The Holley 12-804 is a 1 to 4 range PSI regulator. No issues. Great feedback from a knowledgeable group, guys! We are sorry. Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. I still think they sent you the high pressure one. To ensure this condition, the installation of a Holley 12-810 oil pressure safety switch is recommended It's unlikely that anything's stuck. Got a gauge on the FPR to monitor, and at first it was great. Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. We dont share your credit card details with third-party sellers, and we dont sell your information to others. Amazon has encountered an error. Part Number: HLY-12-803. WARNING! By 1913 it was the other way around. When I got it to down to 30 - then the 0-15 psi reg would not hold anymore and climbed to 15 flooding out the engine. If yes what size should I, A: He asked about issues and thoughts of what causes vapor lock, so it is just answered in more detail and suggested solutions on how to fix vapor lock. I take this to mean that the separate boiling points of the constituents occur at atmospheric pressure but at higher pressure the resulting mix has a single boiling point. That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. Holley 12-804 Carburetor Fuel Pressure Regulator 1 To 4 PSI Bottom Is Inlet Sides Are Outlets for a sandrail, rock Crawler, KOH, Ultra4, truck, UTV, side-by-side, dune buggy, mini buggy, manx, king of the hammers, 4x4, or Jeep. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holleys commitment to its customers and their cars is at the core of everything we do. I got all of my supplies in the Home Depot fittings section. The point is the 0-140 regulators (they are all coming out of China now-a-days) will not regulate lower than about 20 reliably so you need a staged system - and even Holley says so on the 803BP design set up. Any of these heavier than gasoline petroleum distillates above will raise the vapor point of gasoline if mixed into it. For more information go to www.P65Warnings.ca.gov, WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov, WARNING: This product can expose you to chemicals including 1,1,1,2-Tetrachloroethane which is known to the State of California to cause cancer. It will get you close. 9517377223. Never had it act up while running, but since E10 fuel came along it is borderline getting started after hot shutdowns. Please choose a different delivery location. Will buy again if I need another one for a different project. Wont be good for a finicky carb. What one is after is new "liquid" fuel which vaporizes easily in open air, lights easily and has a rapid flame spread but NOT a hot explosive one, and burns easily and completely under one atmosphere of pressure - what we call 14.7 to 1 - BUT - and this is most important; does not auto-ignite at a low temperature and WAITS to be lit by the spark after being compressed in the cylinder. . Take a look at the article below. A long time ago it was in use in the oil business. . I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Today's cars are all fuel injection so it doesn't matter how easily the gas evaporates, it is under pressure in a closed system from the tank to the intake. , Many thanks for taking the time to clarify this interesting subject . That's not to say that adding something like kersene won't help, but it can't eliminate the volatile components. If I wait a hour for the system to cool to ambient temperature then it starts easy. Putting kerosene into gasoline - while both are hydrocarbons - and they will blend - the lighter oil nature of the kerosene to the solvent of gasoline; in an amount of 5% is not enough to change the STP vapor point of the gasoline, but it will weaken the octane rating of the gasoline enough to feel it under acceleration AND under pressure will raise the vapor point enough to perhaps prevent vapor lock depending on the ambient and under hood temperatures of where one is located. Rusty, thanks so much for this information. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Vapor lock is caused by usually a fuel that vaporizes too easily at too low a pressure (in the line) due to under-hood heat and not enough pressure on it - which would run great if it could make it to the combustion chamber first. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. [endif]-->