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Cool. (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. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . . They put everything they could into the coal oil including what we would consider low grade gasoline. Adjustable Fuel Regulation From 1 To 4 PSI.220 Inch 7/32 Inch Restriction. . order Product very good. But, . holley blue fuelpump pressure erratic. 1 oz per gallon - not more than 2 is usually in the right "goldie-locks" range. Reviewed in the United States on September 4, 2017. Copyright 2008-2023 OReilly That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. store Also in Tools, Shop Equipment & Chemicals, Cataclean - Fuel and Exhaust System Cleaner, Cataclean Diesel - Fuel and Exhaust System Cleaner, Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Mr. Gasket Fuel Pressure Gauge - 0-15 PSI - 1-1/2 Inch Diameter, Mr. Gasket Fuel Block with 0-15 PSI Liquid Filled Fuel Pressure Gauge, 25 GPH Holley Mighty Mite Electric Fuel Pump, 1.5-4 PSI, Earl's Fem.1/8" NPT to Male 3/8" NPT Pipe Bushing Reducer. Octane is an actual chemical which would be at the light end of the scale for gas, kerosene would be at the heavy end. should be one inlet in two outlets out, i've seen very smart mechanically inclined people hook the carb to one outlet and the pressure in to the other, it's easy to do, not saying anything bad but could be a a possibility. Pre-set at 2.8 PSI For now, in 70 degrees ambient, the bowls are 100 F. at shut-down and after 15 minutes they rise to 115 F. At these temperatures the engine starts back up fine, but I believe another ten degrees will be in the problem zone. No issues. This item cannot be shipped to your selected delivery location. Log In / Register Order Status. Another thing you can do is wire the fuel pump to be hot in run and start through an oil pressure switch - so if the motor shuts off or looses oil pressure the fuel pump shuts off too. This diaphragm repair kit is for 12-803 and 12-804 regulators. WARNING! Does this need to be mounted upright or is it ok on its side? Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. That's where the pressure was going. . Two Port I have a electric pump at the tank to try and speed up the fuel cooling process but if you have a 100 deg F day you may have fuel near 100 deg F in the tank. Full content visible, double tap to read brief content. Exclusive, high-quality Global Featured Holley Transmission Kickdown Cable Bracket 20-121; Gold Zinc Steel for 700R4 . A long time ago it was in use in the oil business. Some parts are not legal for use in California or other states with similar regulations. Q: do you have a picture of it hooked up? Two 3/8" nipples/hose connections and a 3/8" to 1/8" reducer. Mr. Gasket 1561 Fuel Pressure Gauge 1.500 in. 10 in stock. Contact Us - DO NOT EMAIL CAR QUESTIONS. What Rusty writes IS correct. It is not intended to be sold or used for any other purpose. Gasoline at the pump is a blend of different chemicals. In this document is a chart for Seasonal Gasoline Specifications. The only difference that the Holley tech told me between the two springs is the color. If youre looking to dial it in accurately its not going to do it. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. Recommended Parts. I wanted to upload the map, but at 2.73mb, it was too big. September 21, 2010 in Technical. Free Shipping - Holley Fuel Pressure Regulators with qualifying orders of $99. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. 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. Joined: Apr 7, 2008 Posts: 1,727. Adjustable from 1 to 4 PSI. . Discussion in 'The Hokey Ass Message Board' started by striper, Aug 12, 2009. Q: Fuel pump regulator has 3/8" NPT inlet/outlet ports. As an example water would boil and thus "vapor lock" at a really low temperature without ethylene glycol. I still suspect the flooding was due at least in part to fuel boiling in the carburettor bowl and venting the vapor above the float could assist. See also Tom Ogle's "modern" vapor fueling system - google it. Holley 12-804 Fuel Pressure Regulator Brand: Holley 415 ratings -11% $6614 Was: $73.94 3/8" pipe thread ports 7/32" restriction Pressure ranges from 1 to 4 PSI Includes mounting bracket Satin finish See more product details + + Total price: $115.81 Add all three to Cart These items are shipped from and sold by different sellers. Purchased the regulator from Baxter, unit arrived in 4 days.. 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. Please try again. The ethyl acetate in the IMCT loosens hydrogen bonds on the gasoline making it easier to light to burn, but the "oil" - heavier hydro-carbon nature keeps the vapor point higher and flash point still low enough to give good performance. Posts: 32372. In refining crude oil they distill it to separate out the different products. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. 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. i'm trying to figure out why you are running a T when there are two outlets. Once the fuel fills up the float bowls in the carburetor and the needles and seats shut, it starts to build pressure, pushing the diaphragm against the adjustment spring under the adjustment screw and allowing the ball to go "up" against the seat, effectively shutting off fuel flow to the carb. BP cannot by law tell you what you can blend into fuel to change its properties - but any petroleum distillate can be used - and the ester family - many of the alcohols we call them - can also be used. Quadrajets should have 6 to 9 at the inlet or they flood past the needle seats. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. 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. Too much anti-freeze - (typically ethylene glycol) causes the opposite effect even under pressure of the cooling system. Holley part number for the kit is 12-807; Summit sells it for about $6. 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. I switched on the electric pump and it instantly picked up and ran for a few seconds then reverted to the classic vapor lock symptoms. There's always a catch with bargains, Reviewed in the United States on July 9, 2022. . Show details From the manufacturer I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. Why does this occur only under increased pressure? Also, what is it about Kerosine, and possibly the products like LeadMx or Marvel Mystery Oil (mentioned specifically in the article) that drive some improvement? Lots of Chinese Holley 12-803, 804 etc knock-offs are available. $5 Off Your $100 Mobile App Purchase . 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. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Gasoline was so light if you left the cap off a gallon can it would all evaporate in a few days. We tend to speak of pressure as higher or lower than atmospheric however it is a relative measure and pressure applies under all conditions. Holley 12-804 Fuel Pressure Regulator 3/8 pipe thread ports 7/32 restriction Pressure ranges from 1 to 4 PSI Includes mounting bracket Satin finish This regulator is used to adjust to fuel pressure requirements of various carburetors and supplies the proper pressure to the needle and seat valve to prevent flooding or drivability problems. 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. Holley 12-804 Holley Fuel Pressure Regulators JEGS 41040 JEGS Fuel Pressure Gauges Now you need fittings. Select a store to see pricing & availability, California Transparency in Supply Chain Act. GENUINE Holley 12-804 CHROME 1-4 PSI Adjustable Fuel Pressure Regulator Kit $49.99 Free shipping Holley 12-804 Carbureted Fuel Pressure Regulator $37.07 +$14.99 shipping Holley 12-804 Chrome Street Strip Fuel Pressure Regulator 1-4 PSI $54.53 Free shipping Holley Performance 12-804 Fuel Pressure Regulator $54.53 Free shipping Holley 12-804 $55.86 (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 seat. . Reviewed in the United States on June 5, 2022. Interesting theory. You need to be a member in order to leave a comment. Regulator Box showed signs of being opened and clumsily closed and the advertised Rubber Gasket or Gaskets that were mentioned in the instructions were missing. I adjust it up to 2.5 pounds and clean my hands. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. [endif]--> Many thanks for taking the time to clarify this interesting subject . The vapor lock issues that I have are with 1920's Packards where the fuel system is essentially at atmospheric pressure throughout. It needed a bit of adjusting for my purpose, but other than that, it performed perfectly. . => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. . Holley low pressure reg woes #12-804. 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. ***The inlet pressure limitation is 7 psi. Shipping cost, delivery date, and order total (including tax) shown at checkout. Please try again. Too much fuel pressure for a given needle and seat . Sorry, we were unable to perform your search at this time. He finally achieved significant improvement by fitting a vent to the carburettor top (which is routed away and under the car for safety). I appreciate it. 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? In the early days of the oil business the demand was for kerosene or coal oil. It makes no discernible difference to power but if the conditions are sufficiently adverse it will still vapour lock and then you just have to wait until it cools. Refineries have been doing this for decades. It will meet your needs and deliver great quality at an affordable cost. I have no idea - you are in uncharted territory. To see our price, add these items to your cart. Will changing the orientation change the preset pressure setting (checkball falling instead of raising)? Applications. P/N 12-803, 12-501, 12-804, 12-500, & 15812NOS Installation Instructions WARNING! Neither the Holley instructions nor anywhere I can find says what the maximum inlet PSI should be allowed to the regulator - but I was told it was 16 psi and one other spot on the web says something similar. Holley HOL 12-804 12-804 Fuel Pressure Regulator Brand: Holley 436 ratings | 33 answered questions Amazon's Choice in Automotive Replacement Fuel Injection Pressure Regulators by Holley $4119 FREE Returns Adjustable fuel regulation from 1 to 4 psi .220" (7/32") restriction 3/8" NPT ports ( 1 in, 2 out) Mounting bracket included Pre-set at 2.8 PSI Right & left, Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.Learn more how customers reviews work on Amazon. The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. Average for the last 12 months. Wont be good for a finicky carb. As you can see from what it replaces - it is "hot" solvent - but not quite as hot as acetone in its ability to dissolve other things. I had hoped that the cooler fuel from the electric pump would solve the problem but it did not. I'm still looking for the reg in this pic. 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. Shipping was fairly fast. FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. As Raywith pointed out, you need to let the pressure go somewhere. Rusty, if you can find a cooperative local high school chemistry class, take a small amount of gasoline, split it into 2 portions, add 5% or so kerosene to one half, and have them do a fractional distillation on both. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator.