Check "Reid Vapor Pressure" in Wikipedia, or similar. Mr. Gasket 1561 Fuel Pressure Gauge 1.500 in. Adjusting Holley Fuel Pressure Regulator? | Hot Rod Forum I am intrigued by you statement, "Once these chemicals are blended - the over-all resulting chemical properties - especially boiling point under pressure is changed - they are NO LONGER SEPARATE boiling points in play.". This item cannot be shipped to your selected delivery location. 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. Shipping was fairly fast. Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. Rusty said any heavier hydrocarbon WILL raise the boiling point - and I said Rusty is correct and OD is wrong. Purchased the regulator from Baxter, unit arrived in 4 days.. Can anyone speak to the validity of this or is anyone currently using an additive for this? Please choose a different delivery location. This product is made of high-quality materials to serve you for years to come. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. 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. By the way, I had an excellent service from this seller (5 stars!). Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. Refining of oil is basically heating it into vapors and then capturing those vapors various degrees of cooling - at the top is "propane" - at the bottom is "pitch" or "road or roof tar". Holley 12-803 Holley Fuel Pressure Regulators | Summit Racing . 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. 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. . IMCT is found in the paint isle of any hardware or home improvement store usually in quart or gallon cans. WARNING! The issue is simple that one is seeking to "re-blend" their own gasoline from one already sold. If you purchased April gas when you take your Antique out of winter storage it is only a month until the switch from 124 deg F to 140 deg F. This might explain a lot of problems in early summer. Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. The engine was running. . Can i install a fuel pressure guage on the unit itself? In the later 1960s, it was somewhat common for people who were going on vacation, in the summer, to add a gallon or two of diesel to a full tank of gasoline for their trip. My car runs and idles fine with no flooding when running with the electric pump, the flooding only occurred once when it vapor locked. Worked well out of the box. if you run a holley blue pump it is set at 14psi from the factory and you must run the regulator that came with the pump . I feel I am 95% there, and a slight improvement would be all I need - for now, that is unless the ethanal mix changes (your tax dollars at work). 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. We are sorry. Vapor lock was just a fact of life for the Fords. Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 I have found IMCT is a happy medium that does both in the right quantities - raise boiling point and octane just enough to be a "goldie-locks" kind of additive to help prevent vapor lock. % Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. 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. Can you adjust the fuel pressure? Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . There is no hard and fast cutoff for any of these. Unfortunately, this fuel pressure regulator does not even come close to regulating the pressure and keeping the pressure down. But the heavier elements will raise the boiling point of the mixture. Thinking Kerosene is probably the way I will go at this point. Holley 12-804 Adjustable Fuel Pressure Regulator, 1-4 PSI - Speedway Motors You would'nt just be reading the inlet pressure would you? Inlet from fuel pump is at bottom. Point and secure it into a clean container Inlet pressure of 7 psi limitation means your pump can not put out more than 7 psi to the regulator for it to properly operate. [endif]-->. One must understand the chemical reactions and interactions of blending other hydrocarbons into what we call gasoline and then still have it able to have the same properties desired of the product called gasoline. Find many great new & used options and get the best deals for Holley 26-137 Adjustable Secondary Idle Lever at the best online prices at eBay! 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. Is there a brand name? Most regulators need to be flowing to set pressure. Holley HOL 12-804 12-804 Fuel Pressure Regulator. Plain WATER has great cooling properties, but under pressure will boil at a lower temperature than anti-freeze mixed with water - up to a certain point. Holley 12-804 Fuel Pressure Regulator - amazon.ca Discussion in 'The Hokey Ass Message Board' started by oldrelics, Oct 12, 2010. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability, Holley HOL 12-804 12-804 Fuel Pressure Regulator. At first it seemed fine, set it to 1.5 PSI and away we go. Gasoline at the pump is a blend of different chemicals. holley blue fuelpump pressure erratic. There are two kinds and they look the same. If I wait a hour for the system to cool to ambient temperature then it starts easy. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Holley's instructions say, ". Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. There was a problem adding this item to Cart. I did, works great & looks beautiful. Includes initial monthly payment and selected options. There is a light spring that helps push the ball against the the seat in the direction of the fuel flow. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports. The BP article explains causes - not how to change fuel formulations - so for this discussion it explains nothing. 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 Holley Carburetor Fuel Pressure Regulator 1 To 4 Psi Bottom Inlet Sides I will be fitting a pressure regulator, it can only help and will have to wait for the next vapor lock to occur to see if it overcomes the flooding. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . Shop Fuel Pressure Regulators at Summit Racing. You can do a Google search for it, though. Easy to read. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. We tend to speak of pressure as higher or lower than atmospheric however it is a relative measure and pressure applies under all conditions. Usually, just runs really lean for a couple of minutes, and will not go above idle until fresh fuel finally clears through. couple more questions, Rusty, what exactly are "heavy ends"? But, . To add the following enhancements to your purchase, choose a different seller. No mention of vapor lock issues, but engine de-carbon activities. . Adjustable from 1 to 4 PSI. . Join Date: Nov 2007 Posts: 22035 Share Tweet #2 P/N 12-803, 12-803BP, & 12-804 Installation Instructions 199R7914-3 NOTE: 12-803BP IS NOT TO BE USED WITH MECHANICAL FUEL PUMPS! Refineries have been doing this for decades. Troubleshooting Carburetor Problems and Vaporlock Blues Revisited - Hagerty Lifestyle. 12-804) is a Low Pressure (1-4 PSI) regulator. In those days before 1905 kerosene had a strong piercing odor and coal oil lamps sometimes exploded. Take a look at the article below. FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. 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 I remember when I was a teen in the 50's and everyone had a flathead Ford V8 or a Chevy stovebolt 6. Like many others, I have been considering what to do recently. %PDF-1.4 Yes, you will need to buy the type of connection you want to use such as hose barb, compre. Please refresh and try again. Depending what your compression is you could add 5% kerosene up to 25% for cars from the 20s with very low compression, like 5:1 or less. 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. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. 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. Use with standard pump only -not recommended for maximum pressure pumps. 2-Port Carbureted Fuel Pressure Regulator (12-804) by Holley. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. As you can see in the photo it's gold, (the same colour as what's in the model 12-803) I called Holley directly and customer service is acting like they're unaware of the issue, even though I've read threads online going as far back as 2018 mentioning this. Holley low pressure reg woes #12-804. Copyright 2008-2023 OReilly I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Part Number: HLY-12-803. 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. Show details From the manufacturer What we call gasoline - as Rusty showed; is blended today - and the various chemicals blended into it for the various regions and state laws make it a special product where you BUY it. . Boy am I glad to have happened on this thread. Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. The regulator is a Holley 12-804, I was told it went down to 1 psi and I have a stock mechanical fuel pump. Reviewed in the United States on April 2, 2022. Got a gauge on the FPR to monitor, and at first it was great. The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles: WARNING: It is against the law to install this part on an Emissions Controlled Vehicle. The reg takes 3/8" fittings and the gauge takes 1/8" fittings. You can wire a by-pass switch for priming if it is really required. . The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. Holley 804 fuel pressure regulator install - YouTube I adjust it up to 2.5 pounds and clean my hands. The only difference that the Holley tech told me between the two springs is the color. It's not the vendor's fault, these things should have been recalled, or the vendors made aware of the issue so that they could be inspected before they're sold. Works and does the job. . The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. I have already been thinking about switching over to a modern fuel pump, say the Mallory 110, plumbing in a regulator just downstream of the carbs, and taking the bypass fuel back to the fuel tank. Please use a different way to share. 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. Yes you can adjust fuel pressure with this regulator. It works but not as well as some of the off brands like spectre. I mix Industrial Maintenance Coating Thinner (IMCT) around 1 oz per gallon - which is basically a blend of petroleum distillate in the paint thinner / mineral spirits (once called also "white gas") family and ethyl acetate and not only does it cure vapor lock it increases octane because you can feel it in the power and acceleration. Thus the "lowest boiling point are the cause of vapour lock" is also NOT CORRECT thinking. The 12-804 is made from durable aluminum and has a satin chrome finish that is extremely resilient to corrosion and abrasive chemicals. PDF ELECTRIC FUEL PUMPS P/N 12-801-1, 712-801-1, 12-802-1, 712-802 - Holley HOLLEY pressure reg. PROBLEMS | The H.A.M.B. 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. Use with standard pump only - not recommended for maximum pressure pumps. 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 None of them worked. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Some of these items ship sooner than the others. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Performance/Engines/Transmissions - TheSamba.com Sapulpa Herald (Sapulpa, Okla.), Vol. 9, No. 74, Ed. 1 Tuesday In this document is a chart for Seasonal Gasoline Specifications. Quick & Hassle Free. I do wish there were some stamped values on the adjustment screw like other models I have seen. MFG. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. Amazon has encountered an error. 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 fuel pump and fuel line setting top center of the engine was not only in the hottest ambient temp, except for the exhaust manifolds, under the hood they acted as a heat sink transferring heat from the block to the air. loyalty program I turned into a side street and opened the hood. Exclusive, high-quality Global Featured Holley Transmission Kickdown Cable Bracket 20-121; Gold Zinc Steel for 700R4 . As an example water would boil and thus "vapor lock" at a really low temperature without ethylene glycol. I have a holley low pressure reg. The 12-803 4.5-9 psi spring is plain, (just the gold colored plating) the spring is accessible and replacable The cheap dial units are terrible. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. 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. 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. Takes a little time to peel back the rubber case then remove the glass with a fine blade screwdriver, reset to zero. 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. . Holley 12-803 Fuel Pressure Regulator - The BangShift.com Forums Reviewed in the United States on January 15, 2021. The Holley 12-804 is a 1 to 4 range PSI regulator. 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? 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. 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. Much of the excess engine heat will end up soaking the fuel system under the hood. So the goal is to raise the vapor point temperature without lowering the auto-ignition temperature or flash point or flame spread speed - or increasing the flame spread speed too much. Prewar cars have very low compression and will run better on gas that has some kerosene added. If yes what size should I, A: Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. Holly Fuel pressure regulator install | Jeep Enthusiast Forums Yes the light elements will still be in there. CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. Spring clothes pins, aluminium foil, wet burlap, etc. Purchased the regulator from Baxter, unit arrived in 4 days.. Enhancements you chose aren't available for this seller. As Raywith pointed out, you need to let the pressure go somewhere. LOW PRESSURE REGULATOR 12-804 - Allstate Carburetor => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. Will rise to above 180 degrees on the Temperature gauge. 10 in stock. Log In / Register Order Status. ${cardName} unavailable for quantities greater than ${maxQuantity}. Reviewed in the United States on September 4, 2017. If you put in too much you can return the fuel to some "kick" without knock with a small amount of acetone. the fuel pressure gage needs to be in the line going to carbs. Will changing the orientation change the preset pressure setting (checkball falling instead of raising)? Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO". 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. For over a century Holley has driven the cutting edge of fuel-system design. There was a problem completing your request. We will have the previous answer corrected. Call 800.979.0122, 7am-10pm, everyday. 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. Interesting theory. 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. If this is true, how come adding antifreeze to water raises the boiling point? Kerosene diesel fuel or stove oil will work.