Will rise to above 180 degrees on the Temperature gauge. 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. Please make sure that you are posting in the form of a question. I Have problems with the fuel temp in my 1937 Buick. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports. 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 This is another vexing problem with Ethanol mix, which is about all you can get here in CT. Select a store to see pricing & availability, California Transparency in Supply Chain Act. Copyright 2023, Antique Automobile Club of America. $41.19. 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. This will ensure that the pump will not continue to operate after the engine is . Going to check my VW bus fuel pump pressure. In answer to Rusty's comment about adding anti freeze to water, the difference is that water is only one material, H2O, with a single boiling point (varied only by pressure). the installation of a Holley 12-810 oil pressure safety switch is recommended for installation into the wiring circuit. 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. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. One common problem is when you have an abnormally warm day in the winter, and the low vapor pressure gasoline in the car will vapor lock on that hot day. 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". Show details From the manufacturer Please try again. For over a century Holley has driven the cutting edge of fuel-system design. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. the cause for your fuel pressure fluxuation is because the fuel pressure is bumping up against the regulator and the extra fuel has no where to go , the quick fix is run a return line . 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. 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. Adjustable fuel regulation from 1 to 4 psi, Holley 12-804 Reg, Fuel Press 1-4 Psi Pol. 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. couple more questions, Rusty, what exactly are "heavy ends"? I have adjusted a 6-9 lbs pump down. Eligible for Return, Refund or Replacement within 30 days of receipt. (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. 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). Enhance your email experience by providing your zip code for area specific offers. Q: 12-804) is a Low Pressure (1-4 PSI) regulator. Driving on a warm day in heavy stop start traffic it started vapor locking on a climb - using 10% ethanol fuel with no additive . 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. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. I have the one I have set up in a deadhead setup. Usually, just runs really lean for a couple of minutes, and will not go above idle until fresh fuel finally clears through. HWYoF~Ta77[Z4"bG K=yK 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. So with that vapor fueling system - you are stuck "downgrading it" to a lower quality fuel. Yes the light elements will still be in there. . We tend to speak of pressure as higher or lower than atmospheric however it is a relative measure and pressure applies under all conditions. 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. No mention of vapor lock issues, but engine de-carbon activities. I wanted to upload the map, but at 2.73mb, it was too big. See also Tom Ogle's "modern" vapor fueling system - google it. It looks like WhatsApp is not installed on your phone. The '54 Bentley already has an electric SU pump back near the tank, and it's low pressure output is just about right for the two SU H6 type carbs. 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. Installation was made more complicated by the absence of a port for a pressure gauge, which means Does this need to be mounted upright or is it ok on its side? But, . Discussion in 'The Hokey Ass Message Board' started by striper, Aug 12, 2009. ", So . It is not intended to be sold or used for any other purpose. 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. Reviewed in the United States on June 5, 2022. Please use a different way to share. Shiny Finish. Fuel pressure regulators are used to adjust for fuel pressure requirements of various carburetors. Your question might be answered by sellers, manufacturers, or customers who bought this product. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. The first opportunity to try it occurred recently. Please try again later. I have used up to 20% kerosene with no discernible change and have spoken to people who told me that years ago on farms these old cars would run fine if started on gasoline then switched to 100% kerosene. Two 3/8" nipples/hose connections and a 3/8" to 1/8" reducer. loyalty program This product is universal and applies to all vehicles. Joined: Apr 7, 2008 Posts: 1,727. I still think they sent you the high pressure one. Is there a brand name? It will get you close. do you have a picture of it hooked up? Boy am I glad to have happened on this thread. 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. In a deadhead design the fuel comes into the regulator from the bottom past a check ball which is held open by a pin on the diaphragm. It needed a bit of adjusting for my purpose, but other than that, it performed perfectly. Try it, I think you will find it works. Please refresh and try again. Note also that PURE ethylene glycol is also flammable but also miscible with water. Does it come with the hose fittings or to be bought separately? 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. We work hard to protect your security and privacy. $12.15: ac000400: Front Axle Beam Bushing Reamer For 1.34 Up To 1.50 Diameter . Will buy again if I need another one for a different project. The Holley 12-804 fuel pressure regulator is adjustable from 1-4 psi. Bobburns thank you for the confirmation and technical explanation. I like the attached simple explanation of the issue. Most regulators need to be flowing to set pressure. Is it a product that would be sold by a panel beater's supply shop? OD says the Boiling point of gasoline cannot be raised by adding a heavier hydrocarbon - such as kerosene or diesel - and points to a high school chemistry class experiment as his proof. If you have it plumbed up "dead headed", lowering the pressure might not react very quickly. I found this document on my local Oil Refinery's web site and it may help explain some of the problems with vapor lock and hard start. You can wire a by-pass switch for priming if it is really required. What if any additives would do this and why? Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. A long time ago it was in use in the oil business. 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. There are two kinds and they look the same. Sign up for a new account in our community. I ordered the 12-804 regulator online because I couldn't find one locally, this is for an engine on a piece of equipment that I make my living with. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Was actually disappointed with the quality of the regulator. . 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. On occasions here in NZ, we get extreme heat and old cars vaporlock. Please choose a different delivery location. Adding some additives can raise the AVERGE boiling point but cannot remove the lower-boiling components, so regardless of what higher ends are present, the initial boiling point will remain that of the most volatile components. It is a measure, as I understand it, of how readily the fuel will evaporate in open air. 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. No issues. 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. Free shipping for many products! 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. The term heavy ends may be old fashioned and obsolete. and a rotary click style one here on the shelf pete, you are welcome to borrow them to troubleshoot your problem.. let me Know. The seller gratefully sent me a replacement part but the result was the same. Steve, gasoline isn't a single chemical compound but a mixture of hundreds of individual chemical compounds which have a large range of boiling points. 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. Some Holley 12-803 4.5-9 psi and 12-804 1-4 psi regulators mislabeled from factory. IMCT is a "new product" from Klean-Strip they call "Industrial Maintenance Coating Thinner" that provides good solvency and can be used in place of MEK, Toluene, Xylene and VM&P Naphtha for thinning Industrial Maintenance Coatings. If you put in too much you can return the fuel to some "kick" without knock with a small amount of acetone. Add to cart. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. They put everything they could into the coal oil including what we would consider low grade gasoline. i'm trying to figure out why you are running a T when there are two outlets. 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. Thinking Kerosene is probably the way I will go at this point. The chemistry class experiment you are referring to will yield the approximate boiling (vapor) point at STP - Standard Temperature and Pressure ONLY. Q: . 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. Wont be good for a finicky carb. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. I adjust it up to 2.5 pounds and clean my hands. So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. The thinner, lighter products are at the light end of the scale the thicker heavier products are at heavy end. The carburettor was flooding, the electric pump was still running. Troubleshooting Carburetor Problems and Vaporlock Blues Revisited - Hagerty Lifestyle. There is clearance around the needle which I would have thought would be enough to vent the increased pressure but maybe not. 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. 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. There is no hard and fast cutoff for any of these. Ships from and sold by Performance Guarantee. The regulator is a Holley 12-804, I was told it went down to 1 psi and I have a stock mechanical fuel pump. Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. 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. This product is made of high-quality materials to serve you for years to come. Of course you may already have this setup - that is the first issue. [endif]-->. 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. 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. I prefer to keep things simple but I appreciate the more correct technical approach. I do wish there were some stamped values on the adjustment screw like other models I have seen. 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. holley blue fuelpump pressure erratic. Holley's instructions say, ". Chemistry does NOT work that way - just like adding more any one ingredient to a cake mix will make the cake better. 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. 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! Also I fitted a modern soft seat to the carburettor to assist in shutting off the higher pressure from the pump - the original shut off is a brass tapered needle on a brass seat. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. Some have reported more power, easier starting and cooler running especially in very low compression cars of the twenties and early 30s. Most certainly also, should that be successful, I will then experiment with IMCT as well. 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. These will raise the boiling point of the fuel but reduce the octane. I appreciate it!! The check ball is held shut with the diaphragm and spring and once the desired fuel pressure builds up it opens that valve and allows fuel to go back to the tank. In the fuel use map in the Exxon or Mobil gasoline websites, there are a few places where the Reid Vapor Pressure spec is varied from other fuels. Adjustable Fuel Regulation From 1 To 4 PSI.220 Inch 7/32 Inch Restriction. I tried to bring the 0-140 pressure feed regulator down to 30 by adjusting the two - to up the return flow and lower the feed pressure - but the 15 psi reg I had just worked on started to climb past 9. Sorry, you're using a web browser that is no longer supported. The reg takes 3/8" fittings and the gauge takes 1/8" fittings. $5 Off Your $100 Mobile App Purchase . 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. At first it seemed fine, set it to 1.5 PSI and away we go. Could you explain a little more about how you would run the bypass? The only difference that the Holley tech told me between the two springs is the color. It is not all the same. Part Number: HLY-12-803. "Pure" Ethyl Acetate could be called an "alcohol" as Ethyl acetate is the ester of ethanol and acetic acid; and it is manufactured on a large scale for use as a solvent. 1 oz per gallon - not more than 2 is usually in the right "goldie-locks" range. Enhancements you chose aren't available for this seller. FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. In fact I can completely remove the adjusting screw and it still does not go down to 3psi. Shop Fuel Pressure Regulators at Summit Racing. This item cannot be shipped to your selected delivery location. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. One is a deadhead and one is a by-pass. I remember when I was a teen in the 50's and everyone had a flathead Ford V8 or a Chevy stovebolt 6. te4cmCbGnt]&~`N@RPyBTa$=~fo:/T 92YE)3Uofo4Ou].-zowDt*ae^qf9z/?. Talk to the experts. Thanks for the comments, I am aware of the need for a regulating valve to reduce the pump pressure and would have fitted one except that I was advised by the owner of an identical car to mine that his car does not flood using the same electric pump without a regulator, it is only a 2.5 -4 psi pump.
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