The lower I can get with this pressure is 3.5 psi (at max adjustment). (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. This item: Holley HOL 12-886 Regulator $13129 MEASUREMAN 1-1/2" Dial Size, 304 Stainless Steel case, Liquid Filled Fuel Pressure Gauge, 0-100Psi, 3-2-3%, 1/8"NPT Center Back Mount $2597 Moroso 65380 Fuel Line Fitting $1701 Total price: $174.27 Add all three to Cart Some of these items ship sooner than the others. 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. if you were packing them in boxes they would look identical. All kinds of remedies were tried. Ships from and sold by Performance Guarantee. Works, don't use a liquid filled gauge in an engine compartment! All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. Recommended Parts. Unfortunately, this fuel pressure regulator does not even come close to regulating the pressure and keeping the pressure down. To ensure this condition, the installation of a Holley 12-810 oil pressure safety switch is recommended It's easy! Rusty, thanks so much for this information. Eligible for Return, Refund or Replacement within 30 days of receipt. Refineries have been doing this for decades. A long time ago it was in use in the oil business. 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. Typically there are "winter" and "summer" blends with different vapor pressures to promote atomization at cold temps and to discourage vapor lock at hot temps. store I have the one I have set up in a deadhead setup. Will buy again if I need another one for a different project. It was not. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. In theory the vapor carburetor was the way to go in that day - with lower flash point fuels like poor grade fuels that all pretty much resembled the weight of kerosene in that early day of motor fuels. I can only say acetone will lower flash point (light easier) but also lower auto-ignition temperature and thus create knock into too much of a quantity - while a very little bit will raise octane but not lower auto-ignition - so if you go TOO low with kerosene or diesel you can bring back some kick to the fuel with SMALL amounts of acetone. Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Can you adjust the fuel pressure? 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. http://www.jalopyjournal.com/forum/showthread.php?t=386155, Kingman, Arizona - The place on the way to other p, http://www.holley.com/types/Fuel%20Pressure%20Regulators%20-%20Carbureted.asp, (You must log in or sign up to reply here. The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. Overview. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. i'm trying to figure out why you are running a T when there are two outlets. Your question might be answered by sellers, manufacturers, or customers who bought this product. . The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. No issues. Use with standard pump only - not recommended for maximum pressure pumps. For more information go to www.P65Warnings.ca.gov/passenger-vehicle, WARNING: This product can expose you to chemicals including Styrene which is known to the State of California to cause cancer. To keep it on simple terms, several people have confirmed that adding some kerosene, diesel fuel or stove oil will reduce the tendency to vapor lock and will NOT hurt an older model, low compression engine. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability, Holley HOL 12-804 12-804 Fuel Pressure Regulator. Kerosene diesel fuel or stove oil will work. Find an Automotive Service Professional Call 800.979.0122, 7am-10pm, everyday. What if any additives would do this and why? Easier said than done - especially without a "chemistry set", OD says a simple high school chemistry experiment will show this - BUT I said the boiling points will appear the same under STP (Standard Temperature and Pressure - which is one atmosphere of pressure at 77 degrees F - commonly room temperature ) - BUT under pressure in a fuel line the boiling point (vapor point) will be raised enough to prevent vapor lock at higher temperatures. Average for the last 12 months. 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 $11.9 3000 501 Also services earlier models (1953 to 1964) using swinging drawbar: NAA 600 For Ford Tractors 2000 4000 (1965 and up) Jubilee . Check "Reid Vapor Pressure" in Wikipedia, or similar. Please try again later. . LOW PRESSURE REGULATOR 12-804 quantity. The pressure regulator works fine when mounted flat, but should work ok when mounted on it. order In fractional distillation (the refining of oil) - what we call "mineral spirits", "paint thinner", "kerosene" and "diesel fuel" all ALL "heavier" hydrocarbons (pretty much in that order) than what we call gasoline - in that they occur lower in the distillation tower and condense at lower temperatures back into liquid before what we call "gasoline" does. (Maybe this arrangement was intentional to assist in vaporising the fuels of the day but it is all bad in hot weather with today's fuels). The owner had tried all practical means to reduce the heat gain of the fuel system but with little improvement. ). I appreciate it. I would like to try IMCT, how is it sold? Join Date: Nov 2007 Posts: 22035 Share Tweet #2 Boy am I glad to have happened on this thread. [endif]-->. Contact Us - DO NOT EMAIL CAR QUESTIONS. 0 It is no different than mixing water with ethylene glycol to make what we call anti freeze or with methanol to make windshield washer fluid - you get a completely different product - it is not just water any more; and nor can you separate them back into their original separate entities - so you cannot think of them that way any more either. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . I do wish there were some stamped values on the adjustment screw like other models I have seen. te4cmCbGnt]&~`N@RPyBTa$=~fo:/T 92YE)3Uofo4Ou].-zowDt*ae^qf9z/?. The issue is simple that one is seeking to "re-blend" their own gasoline from one already sold. and a rotary click style one here on the shelf pete, you are welcome to borrow them to troubleshoot your problem.. let me Know. Privacy Policy. The BP article does not address how to re-blend your own fuel, and indeed - each batch of gasoline - and even how long it has been sitting in a tank will change it's properties as certain things evaporate out of the fuel changing it's properties if in a vented tank. September 21, 2010 in Technical. 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. A: Adjustable from 1 to 4 PSI. This item cannot be shipped to your selected delivery location. Some have reported more power, easier starting and cooler running especially in very low compression cars of the twenties and early 30s. Gasoline at the pump is a blend of different chemicals. Q: Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. If I wait a hour for the system to cool to ambient temperature then it starts easy. This Holley universal low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI. Is there a brand name? Please try again. The thinner, lighter products are at the light end of the scale the thicker heavier products are at heavy end. . Fuel Pressure Regulator; Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. A by-pass style regulator has the fuel coming in the same side of the check ball as where the fuel comes out to the carb. Reasonable . There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. Designed using state-of-the-art technology and with customers in mind. Turn the screw out to lower the pressure. . The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. The issue is boiling points UNDER PRESSURE we are talking about here - though the BP article speaks to other issues of engine and carburetor design contributing to the vapor lock problem. Q: 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. Driving on a warm day in heavy stop start traffic it started vapor locking on a climb - using 10% ethanol fuel with no additive . I got all of my supplies in the Home Depot fittings section. If you put in too much you can return the fuel to some "kick" without knock with a small amount of acetone. I cannot help you - and no one can without knowing the exact make up of the gasoline being refined where you are. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. Volatility is a measure of the gasolines tendency to vaporize under a given set of conditions. For the best experience please upgrade or visit the site on another browser. Holley Manufacturer Part Number 12-804 Manufacturer Holley Assembled Product Dimensions (L x W x H) 3.50 x 3.50 x 2.50 Inches Warranty Warranty information 90 DAY REPLACEMENT IF DEFECTIVE Warnings Warning Text proposition 65 reasons:titanium dioxide, other chemicals WARNING - California Proposition 65 None Report incorrect product information I recently fitted an electric fuel pump to one of the cars. . http://www.frontieroil.com/attachments/contentmanagers/106/PrdctsSpec_UnleadGasSpecs.pdf. Octane is an actual chemical which would be at the light end of the scale for gas, kerosene would be at the heavy end. Lots of Chinese Holley 12-803, 804 etc knock-offs are available. Most certainly also, should that be successful, I will then experiment with IMCT as well. FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. All petroleum distillates have different chemical properties which change depending on what you mix them with. We will have the previous answer corrected. ***The inlet pressure limitation is 7 psi. Holley 12-804 1-4 Psi Carbureted Two Port Fuel Pressure Regulator: Item #: HLY12-804 : Quantity: Price: $53.99 Add to cart . ***The inlet pressure limitation is 7 psi. . Decrease pressure by turning the adjustment screw counter-clockwise. To see our price, add these items to your cart. 2023 Holley Performance Products, Inc. All Rights Reserved. [endif]--> Many thanks for taking the time to clarify this interesting subject . That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. If I could get 75-85 octane, non-ethanol, Regular gasoline that vaporized at above 180 deg F, I think my car would run fine all the time. Holley 12-840 4.5-9 PSI Adjustable Billet Fuel Pressure Regulator with 3/8" NTP Ports,Black Anodized Brand: Holley 24 ratings | 11 answered questions $10902 & FREE Returns The package length is 9.652 centimeters The package height is 6.604 centimeters The package width is 9.144 centimeters Package Weight : 0.2 pounds See more product details Enhance your email experience by providing your zip code for area specific offers. ;b DK%*DO[%A IPd?Q~]=n1)E1D*q`D fF-"4N3i4\1uOn(@%c0IHQg`~uKVf{/r0d2}XVXi1-tpE1K[T*3"IS0v27UfTajff`"(dJD0fFlvryT{?:VUusSqD?R$LlalK&@$8q'qbSEv . Some Holley 12-803 4.5-9 psi and 12-804 1-4 psi regulators mislabeled from factory.
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