It was not. We are sorry. Needs you to make/tap your own threads for screws, Reviewed in the United States on February 4, 2023. Was actually disappointed with the quality of the regulator. couple more questions, Rusty, what exactly are "heavy ends"? Holley(R) has been the undisputed leader in fuel systems for over 100 years. . Google ethyl acetate and pay attention to it's "pure" boiling point, and remember IMCT is a blend of a white gas family of a petroleum distillate and ethyl acetate. Most regulators need to be flowing to set pressure. 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. Holley Fuel Pressure Regulator Rebuild 12-804 - YouTube 0:00 / 37:53 Holley Fuel Pressure Regulator Rebuild 12-804 DurocShark 309 subscribers Subscribe 10K views 3 years ago I walk through. You set it to the exact fuel pressure you want. I put it . When it burns however, it is an eye and throat irritant, even though it raises octane, burns hotter, easier, and cleaner. Fuel pressure regulator includes mounting bracket with 2 each self-tapping screws for regulator to bracket installation purposes and 3 screws for bracket to vehicle installation.Regulatorhas a 3/8" NPT tapped fuel pressure gauge port and requires reducer 617-6157 to install the gauge. May God's grace bless you in the Lord Jesus Christ. Take a look at the article below. On occasions here in NZ, we get extreme heat and old cars vaporlock. At first it seemed fine, set it to 1.5 PSI and away we go. With this set up, pressures throughout system varies only very slightly from atmospheric, lower up to the vacuum tank and higher in the gravity feed from the vacuum tank to the carburettor. Post in the forum instead. This satin finish regulator feature 3/8 pipe thread . Most certainly also, should that be successful, I will then experiment with IMCT as well. Can i install a fuel pressure guage on the unit itself? Holley's instructions say, ". The carburettor was flooding, the electric pump was still running. Then, we got what was loosely described as winter gas, all year round, with RFG. Might have been along the same lines as adding a quart of atf to the engine oil to help quiet noisy hydraulic valve lifters, or for "sludge clean-up" activities? Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO", Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia, https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. 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. Log In / Register Order Status. (that is this one in the image below) The adjustment spring under the adjustment screw is pushing down on the diaphragm holding the ball off it's . Try it, I think you will find it works. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Powered by Invision Community, http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf. Talk to the experts. It appears this one needs 40 to 50 minimum. From that time on octane ratings slowly rose, helped by the addition of more and more tetraethyl lead. CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. The fuel pressure is at 1 - 3 psig since the pump is not running. How much should I add to every gallon of gas.I believe they are adding about 5% ethanol to the fuel here. 12-804 Part Type: Fuel Pressure Regulators Product Line: Holley Fuel Pressure Regulators Summit Racing Part Number: HLY-12-804 UPC: 090127020234 Regulator Pressure (psi): 1-4 Regulator Style: Non-return Regulator Location: Inline Boost/Vacuum Reference Port: No Gauge Port: No Inlet Quantity: 1 Regulator Inlet Size: 3/8 in. So they started putting more of the low grade gas, or high grade kerosene into the gas. You may receive a partial or no refund on used, damaged or materially different returns. The engine was running. There are two kinds and they look the same. Privacy Policy. i'm trying to figure out why you are running a T when there are two outlets. Recommended Parts. fuel pressure in at the top, fuel pressure out on each side. Please refresh and try again. Adjustable fuel regulation from 1 to 4 psi, 1965 and older U.S. manufactured California Certified vehicles, 1967 and older U.S. manufactured Federally Certified vehicles, 1967 and older Foreign manufactured vehicle, 1966 and newer U.S. manufactured California Certified vehicles, 1968 and newer U.S. manufactured Federally Certified vehicles, 1968 and newer Foreign manufactured vehicle. I have largely eliminated this problem with all fuel system components rebuilt, and an electric fuel pump but will get occasional stumble with a hot (after say, an hour run) engine idling or in traffic if it is say, 80 or hotter out. Reviewed in the United States on September 4, 2017. Please try again later. Its a bypass arrangement with non return valves to prevent reverse flow and is operated by a switch for use in event of vapor lock. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. So, I take the reg apart to see if it is all clean and looks good. Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 for Holley : Amazon.com.au: Automotive 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. What I would do, is with the car off, (or electric pump off), turn the screw a good ways out. The reliable, albiet slower, stovebolts never suffered vapor lock because the fuel pump and lines were up front in the airstream of the engine fan. Click here to find a Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. This will ensure that the pump will not continue to operate after the engine is . Too much fuel pressure for a given needle and seat . neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . It is not intended to be sold or used for any other purpose. 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. This went on until they developed the cracking process which allowed more flexibility in what they got out of the crude. The float has a needle that projects through the top of the carburettor so it is possible to see whether the float is "floating" or not. Free Shipping - Holley Fuel Pressure Regulators with qualifying orders of $99. Street/Strip Carbureted Applications 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 have used kerosene to avoid vapor lock and there is no doubt it helps, the more the better up to 20% in a low compression 1920's car. Spring clothes pins, aluminium foil, wet burlap, etc. It will meet your needs and deliver great quality at an affordable cost. To ensure this condition, the installation of a Holley 12-810 oil pressure safety switch is recommended It does however produce an irritating fume that irritates the eyes and mucous membranes when burning in gasoline. This part is Backordered. Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part Great product from holley, but these do not come with the supplied tap that's suppose to be in box for the 2 machine screws that mount the regulator to the bracket. 9517377223. Eligible for Return, Refund or Replacement within 30 days of receipt. 0 Full content visible, double tap to read brief content. It's unlikely that anything's stuck. NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. We will have the previous answer corrected. Does it come with the hose fittings or to be bought separately? This Holley FPR (12-804) use to be a perfect choice to solve the "too much fuel pressure" produced by the aftermarket fuel pumps on vintage VW.
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