Quick & Hassle Free. I realize this is an old post - but when people write things that are WRONG - it leaves the next Joe who comes along thinking that is the correct answer when especially in this case - it is NOT. What if any additives would do this and why? The other possibility is that it is due to the higher pump pressure. This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. Then, we got what was loosely described as winter gas, all year round, with RFG. It's unlikely that anything's stuck. I now think that what was happening was that there was sufficient heat in the carburettor to boil the fuel, the vapor from the boiling increased the pressure above the float preventing it from rising and shutting off the supply. Rusty, thanks so much for this information. 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). Yes. Does this mean that we are back to the situation described by OD where the lower boiling point additive reduces only the average boiling point? 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.". I would like to try IMCT, how is it sold? I turned into a side street and opened the hood. Copyright 2008-2023 OReilly You need to be a member in order to leave a comment. 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. Troubleshooting Carburetor Problems and Vaporlock Blues Revisited - Hagerty Lifestyle. Thanks again fellows, for such informative posts. 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". The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. I recall when Texaco used to advertise their "customized for your area" gasoline, in the earlier 1960s. [endif]--> Many thanks for taking the time to clarify this interesting subject . neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . fuel pressure in at the top, fuel pressure out on each side. Tags: None TheSilverBuick ALMOST Spidey ! The summer gasoline vaporizes in the line and the heat soak is quicker and longer on hot day's. 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. #2. Is there a brand name? 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. Holley Carburetor Fuel Pressure Regulator 1 To 4 Psi Bottom Inlet Sides Are Outlets from Pacific Customs Unlimited your best source for Street, Off Road, Sandrail, Dune Buggy, Manx, Rock Crawler, Volksrod, or Mud Buggy VW Parts. Mounting Bracket Included. Easy to read. Reviewed in the United States on January 15, 2021. 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. 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. Spring clothes pins, aluminium foil, wet burlap, etc. 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 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. 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. Vapor lock was just a fact of life for the Fords. Why does this occur only under increased pressure? There was a problem completing your request. Today's fuel is made for high compression engines - and it has an intentionally lower vapor point, with a higher flash point and autoignition point. You refer to the problem of the additive increasing the propensity for the fuel to self ignite however in my case the compression ratio of the cars is so low (around 4 : 1) that I doubt that it would be a problem. Product very good. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. YES the boiling point of gasoline can be raised (or lowered) by an additive - depending on what it is - as can the autoignition temperature which will increase "knock" - using the right additive for the fuel you just bought and put in your tank is the trick and it is always going to be hit and miss - depending on what refinery produced the gasoline in the first place. There is clearance around the needle which I would have thought would be enough to vent the increased pressure but maybe not. Gasoline at the pump is a blend of different chemicals. 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. Please make sure that you are posting in the form of a question. http://www.frontieroil.com/attachments/contentmanagers/106/PrdctsSpec_UnleadGasSpecs.pdf. Works and does the job. 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. This diaphragm repair kit is for 12-803 and 12-804 regulators. Remember STILL transporting fuels was a dangerous thing - and higher grade fuel could just as easily have exploded on it's way to the fueling station or in those glass top hand operated early gas pumps on a hot day. Chemistry does NOT work that way - just like adding more any one ingredient to a cake mix will make the cake better. They use gravity feed from vacuum tank mounted under the hood and directly over the exhaust manifold. CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. One is a deadhead and one is a by-pass. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. store It IS variable and a result of the various fuel blend components. The lower I can get with this pressure is 3.5 psi (at max adjustment). Holley 12-804 Holley Fuel Pressure Regulators JEGS 41040 JEGS Fuel Pressure Gauges Now you need fittings. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing. 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. Can anyone speak to the validity of this or is anyone currently using an additive for this? I'm suggesting to raise the boiling point by adding heavier or oilier substances such as kerosene. I adjust it up to 2.5 pounds and clean my hands. The carb should not flood even with the pump running unless it is putting out enough pressure to over come the float bowl shut off mannerism mechanism of the carb. 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. Browse In Stock and Ready to Ship Alternatives, Universal Fit, 1-4 Fuel Pressure Rating (psi), Aluminum. 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. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. I have heard true lead (LeadMax2000 or simillar) may do this as well? The unit however is working fine but am curious about the missing gaskets and how important they are? I have adjusted a 6-9 lbs pump down. I suspect as the article suggests even with all these steps you can still get the crap gas to boil if it is hot enough under the hood. Please try again later. Open the unit and check the spring color, Reviewed in the United States on April 9, 2018. Works, don't use a liquid filled gauge in an engine compartment! Some have reported more power, easier starting and cooler running especially in very low compression cars of the twenties and early 30s. 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. Show details From the manufacturer The seller gratefully sent me a replacement part but the result was the same. These cars have the carburettor mounted in "V" of the engine with exhaust manifolds running along each side of the carburettor which combined with under hood engine heat makes these cars very susceptible to vapor lock. They sold more gas than coal oil. It was not. I think we have hijacked Steve's thread where he asked the question about raising the boiling point of gas which hopefully has been fully answered by these side issues. The reg takes 3/8" fittings and the gauge takes 1/8" fittings. Yes the light elements will still be in there. Is it a product that would be sold by a panel beater's supply shop? That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. Then I got this good one, to try to get 1.5 PSI to the Kadrons. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 for Holley : Amazon.com.au: Automotive This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Your question might be answered by sellers, manufacturers, or customers who bought this product. Shiny Finish. Joined: Apr 7, 2008 Posts: 1,727. P/N 12-803, 12-803BP, & 12-804 Installation Instructions 199R7914-3 NOTE: 12-803BP IS NOT TO BE USED WITH MECHANICAL FUEL PUMPS! 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. Octane is an actual chemical which would be at the light end of the scale for gas, kerosene would be at the heavy end. If you have it plumbed up "dead headed", lowering the pressure might not react very quickly. Post in the forum instead. $41.19. Part Number: HLY-12-803. Adjustable Fuel Regulation From 1 To 4 PSI .220 Inch 7/32 Inch Restriction. . But, . . A larger tank might need two quarts. Some Holley 12-803 4.5-9 psi and 12-804 1-4 psi regulators mislabeled from factory. Decrease pressure by turning the adjustment screw counter-clockwise. Will changing the orientation change the preset pressure setting (checkball falling instead of raising)? To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. 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. The intent being to get "cool" fuel to the carburettor bypassing the areas where the system heats the fuel. There is no "chemistry set" method to measure fuel vapor points. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. Q: bowls after each run, just to see exactly at what temperature the problems become apparent. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. 9517377223. Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. 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. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Some cars are much more apparent to vapor locking than others, I"ve never experienced here in NJ with either of my older Packards which see all kind of hot summer driving conditions. At first it seemed fine, set it to 1.5 PSI and away we go. Dorman 55241 Fuel Line Filter Kit Universal Fit, EVIL ENERGY 6AN Female to 6AN Female Straight Swivel Coupler Union Fitting Adapter Aluminum Black, Beck Arnley 036-1360 Valve Cover Gasket Set, JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket, Electric Fuel Pump - Compatible with Mercury Marine Carb Models - Mercruiser, 1998 4.3L 262, 2000 5.0L 305, 2000 5.7L 350, MCM/MIE 4.3L V6, 5.0L V8 Gen+ - Replaces 861155A3, 861156A1, 18-8868, UKCOCO Propane Gas Regulator with Pressure Gauge Manometer Level Gauge for BBQ Camping Cookers Caravan Plumber (Green), TEMSONE Adjustable Fuel Pressure Regulator Set Universal EFI FPR with 30-70 Psi Gauge 6AN - 6AN Feed & Return Fuel Line Hose Fitting Connectors Kit Blue & Red, MEANLIN MEASURE 1/4 Inch NPT Air Compressor Regulator with Gauge, 0-150 PSI AR2000 Air Gauge Regulator Inline for Air Compressor and Pneumatic Tools, took a long time to arrive. http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf,