So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. "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. Powered by Invision Community, http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf. (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. Most certainly it will be my plan to fully explore the possibility of "treating the Fuel", with hopes that diesel fuel will make just enough difference to avoid any re-engineering. Check "Reid Vapor Pressure" in Wikipedia, or similar. Holley 804 fuel pressure regulator install - YouTube 0:00 / 5:58 Holley 804 fuel pressure regulator install Schnebs Garage 2.42K subscribers Join Subscribe 72 Share Save 15K views 3 years ago. Some can be used for either - or. One needs to have studied Chemistry as I have to actually know how this works. 4.9. I have used kerosene to avoid vapor lock and there is no doubt it helps, the more the better up to 20% in a low compression 1920's car. Had to reset to Zero. Turn the screw out to lower the pressure. wrapped around the fuel lines. Joined: Apr 7, 2008 Posts: 1,727. Regards, Mike. Purchased the regulator from Baxter, unit arrived in 4 days.. So they started putting more of the low grade gas, or high grade kerosene into the gas. Learn more about our Designed using state-of-the-art technology and with customers in mind. . Putting kerosene into gasoline - while both are hydrocarbons - and they will blend - the lighter oil nature of the kerosene to the solvent of gasoline; in an amount of 5% is not enough to change the STP vapor point of the gasoline, but it will weaken the octane rating of the gasoline enough to feel it under acceleration AND under pressure will raise the vapor point enough to perhaps prevent vapor lock depending on the ambient and under hood temperatures of where one is located. I'm suggesting to raise the boiling point by adding heavier or oilier substances such as kerosene. Driving on a warm day in heavy stop start traffic it started vapor locking on a climb - using 10% ethanol fuel with no additive . Is there a brand name? Shopping Cart Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. 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. It IS variable and a result of the various fuel blend components. So with that vapor fueling system - you are stuck "downgrading it" to a lower quality fuel. The fuel pressure is at 1 - 3 psig since the pump is not running. #2. That's where the pressure was going. Applications. Log In / Register Order Status. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. 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. Reviewed in the United States on June 5, 2022. Shipping was fairly fast. 12-804 12-500 Low-Pressure Fuel Regulator (std. Take a look at the article below. 3/8Inch Npt Ports 1 Inch 2 Out. We are sorry. Use with standard pump only - not recommended for maximum pressure pumps. 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. 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. Click here to find a Can i install a fuel pressure guage on the unit itself? [endif]-->. 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. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. 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. 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. Please try again. Sorry, you're using a web browser that is no longer supported. Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. 0 Please try again later. Boy am I glad to have happened on this thread. 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. This satin finish regulator feature 3/8 pipe thread . This approach is not recommended for higher compression cars made from the mid fifties onwards. My car runs and idles fine with no flooding when running with the electric pump, the flooding only occurred once when it vapor locked. Though I once has it working with only two 0-140 regulators, and since I had messed with the 0-140 regulator on the carb feed side trying to get it to work previously - it popped up to 50 psi - but the 15 psi reg held at 9 psi to the carb - for about 5 minutes, until I tried to reduce the 0-140 below 50 psi. Rusty, thanks so much for this information. NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . I put it . I had hoped that the cooler fuel from the electric pump would solve the problem but it did not. 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. This will ensure that the pump will not continue to operate after the engine is . 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. Otherwise it's good. Worked well out of the box. However I would welcome you advice on the following. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports. Show details From the manufacturer I cannot help you - and no one can without knowing the exact make up of the gasoline being refined where you are. It is an experimental thing and MORE IS NOT BETTER - less is better until you find the happy medium based the fuel you buy or have in the tank already. Average for the last 12 months. 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? I prefer to keep things simple but I appreciate the more correct technical approach. on this design the adjusting screw all the way out should decrease the pressure the most - IF the ball valve will seat TIGHT, When I adjusted pressure below 30 - it would not seat any longer even with the adjustment screw all the way out. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. It seemed to work fine for a while after I dialed it into 2psi at idle, but now it reads 6psi and it won't adjust down to 3psi. Talk to the experts. Fuel Pressure Regulator; Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. It was not. On the Holley 12-804 fuel pressure regulator, the factory preset is supposed to be 2.8 pounds - can anyone say is Holley usually pretty accurate on these presets? None of these contain lead and so should not damage a catalytic converter if you have one, HOWEVER too much IMCT will prolong the burn and may result in unburnt - STILL burning HOT gas being exhausted in the exhaust cycle. (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. December - February gas mixture begins to vaporize at 11-15psi at 105 deg F, April gasoline is 9-11.5 psi at 124 deg F. If you had winter gasoline in your Antique car on a 100 deg day you would only be about 5 degrees from vapor bubbles in the fuel. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. Yes you can adjust fuel pressure with this regulator. 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. The only difference that the Holley tech told me between the two springs is the color. Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. But, . Some have reported more power, easier starting and cooler running especially in very low compression cars of the twenties and early 30s. Posts: 32372. Auto Parts v 6c02f45cd (2fvgn) cv1440. It does however produce an irritating fume that irritates the eyes and mucous membranes when burning in gasoline. Recommended Parts. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holleys commitment to its customers and their cars is at the core of everything we do. Sign up for a new account in our community. In those days before 1905 kerosene had a strong piercing odor and coal oil lamps sometimes exploded. 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. 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. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. If yes what size should I, A: . 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. Too much anti-freeze - (typically ethylene glycol) causes the opposite effect even under pressure of the cooling system. 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. They sold more gas than coal oil. Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. However the part number on the box was 12-804 which should be a 1-4 psi regulator BUT the Part number etched on the unit was 12-804 4.5-9 psi which doesnt exist. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. For more information go to www.P65Warnings.ca.gov. [{"displayPrice":"$58.17","priceAmount":58.17,"currencySymbol":"$","integerValue":"58","decimalSeparator":".","fractionalValue":"17","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"UhTnfcw7IZxaNntXlJwDKCZdMn2swwW9Qa8PxzrWBz%2By8RC0ilxVsHIj8toGUO%2FPmmF8b2HD1iNYooZ7n4ER0XuKiQsQQvJG86lgqsni6KYZs%2FdLcIOIE0Ukulbz%2BJYBuUOC820ciUZxU2UEL9sUjtoq8gdk8bOPIZ3QChg8zpgyIZxlTaXQEA%3D%3D","locale":"en-US","buyingOptionType":"NEW"}]. 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. Kerosene diesel fuel or stove oil will work. 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. 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. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Did not like having to reset to zerobut I did. near you Tags: None TheSilverBuick ALMOST Spidey ! The reg takes 3/8" fittings and the gauge takes 1/8" fittings. See also Tom Ogle's "modern" vapor fueling system - google it. So, I take the reg apart to see if it is all clean and looks good. 3 0 obj <>stream I got all of my supplies in the Home Depot fittings section. None of them worked. CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. 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. Holley carburetors have powered every NASCAR(R) Sprint(R) Cup team and nearly every NHRA(R) Pro-Stock champion for four decades. 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. 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. Unfortunately, this fuel pressure regulator does not even come close to regulating the pressure and keeping the pressure down. There is a light spring that helps push the ball against the the seat in the direction of the fuel flow. if you were packing them in boxes they would look identical. Q: That's not to say that adding something like kersene won't help, but it can't eliminate the volatile components. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. A: A small amount of IMCT in gasoline - depending on whether it is the winter or summer blend - depending on what that is as a fuel where you are - raises the boiling point like kerosene or diesel - but also raises or maintains the octane level slightly as ethyl acetate tends to loosen the hydrogen bonds and lets mixture burn more completely without causing pre-ignition we call "detonation" - which is really simply a slight lowering of the "autoignition temperature". If youre looking to dial it in accurately its not going to do it. They put everything they could into the coal oil including what we would consider low grade 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! The regulator is a Holley 12-804, I was told it went down to 1 psi and I have a stock mechanical fuel pump. Yes the light elements will still be in there. 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. => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. 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. (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 . 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. [endif]-->