Will buy again if I need another one for a different project. Will changing the orientation change the preset pressure setting (checkball falling instead of raising)? He finally achieved significant improvement by fitting a vent to the carburettor top (which is routed away and under the car for safety). 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. Purchased the regulator from Baxter, unit arrived in 4 days.. That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. The point is the 0-140 regulators (they are all coming out of China now-a-days) will not regulate lower than about 20 reliably so you need a staged system - and even Holley says so on the 803BP design set up. Rich boys replaced their 216 stovebolt 6's with GMC 270 or 302 sixes with a performance "full race" cam. The other possibility is that it is due to the higher pump pressure. Reviewed in the United States on September 4, 2017. At first it seemed fine, set it to 1.5 PSI and away we go. 03-28-2012, 03:04 AM. Please refresh and try again. It looks like WhatsApp is not installed on your phone. Discussion in 'The Hokey Ass Message Board' started by striper, Aug 12, 2009. I commented that it was already vented by the clearance around where the float needle projects through the top but he advised that this was not enough and the vent needed to be at least a 1/4" tube and that he could see it venting vapor. Sign up for a new account in our community. We work hard to protect your security and privacy. I do wish there were some stamped values on the adjustment screw like other models I have seen. Refineries have been doing this for decades. 1 oz per gallon - not more than 2 is usually in the right "goldie-locks" range. You'll find they both have the same initial boiling point - been there and done it. Designed using state-of-the-art technology and with customers in mind. To add the following enhancements to your purchase, choose a different seller. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Ships from and sold by Performance Guarantee. Recommended Parts. I would welcome your advice on this - with apologies for the length of this post. Estimated Ship Date: Today. Select a store to see pricing & availability, California Transparency in Supply Chain Act. Q: Octane is an actual chemical which would be at the light end of the scale for gas, kerosene would be at the heavy end. Driving on a warm day in heavy stop start traffic it started vapor locking on a climb - using 10% ethanol fuel with no additive . If yes what size should I, A: Enhancements you chose aren't available for this seller. Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. I have just this Spring started taking temp. 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. . The intent being to get "cool" fuel to the carburettor bypassing the areas where the system heats the fuel. I would like to try IMCT, how is it sold? Discussion in 'The Hokey Ass Message Board' started by oldrelics, Oct 12, 2010. Please make sure that you are posting in the form of a question. My bypass line has a shut-off valve that I can use to manually adjust the pressure, but when air bubbles develop within the input fuel line, this valve requires adjustment to maintain the fuel pressure. As the car is parked Temperature. Includes initial monthly payment and selected options. 4.25 out of 5 stars. 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. => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. 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. 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. 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. Check the status of your Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. LOW PRESSURE REGULATOR 12-804 quantity. The pressure regulator works fine when mounted flat, but should work ok when mounted on it. WARNING! Holley part number for the kit is 12-807; Summit sells it for about $6. Applications. 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. Please try again. Mounting Bracket Included. order If I wait a hour for the system to cool to ambient temperature then it starts easy. From that time on octane ratings slowly rose, helped by the addition of more and more tetraethyl lead. Log In / Register Order Status. 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. 9 really is max. [endif]--> http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf, Many thanks for taking the time to clarify this interesting subject . Reviewed in the United States on April 2, 2022. As Raywith pointed out, you need to let the pressure go somewhere. Great feedback from a knowledgeable group, guys! Adjustable from 1 to 4 PSI. Some can be used for either - or. do you have a picture of it hooked up? MFG. Starting in 1970 leaded gas was taken off the market resulting in the gas we have today. 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 . Fuel Pressure Regulator; Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. 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. We currently do not have an estimate when this item will ship. Accurate description. The Holley 12-804 is one of the most popular low fuel pressure regulators that works perfectly for setups that require 1 to 4 PSI. TURNING THE ADJUSTMENT SCREW ALL THE WAY IN WILL RESULT IN EXCESSIVE FUEL PRESSURE . We dont share your credit card details with third-party sellers, and we dont sell your information to others. 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. 12-804 12-500 Low-Pressure Fuel Regulator (std. The Holley 12-804 is a 1 to 4 range PSI regulator. Privacy Policy. Tags: None TheSilverBuick ALMOST Spidey ! f9vxY"IpBQ? This ensures that it's set too low. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. How much should I add to every gallon of gas.I believe they are adding about 5% ethanol to the fuel here. 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. 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. 2-Port Carbureted Fuel Pressure Regulator (12-804) by Holley. Shopping Cart 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. 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. P/N 12-803, 12-803BP, & 12-804 Installation Instructions 199R7914-3 NOTE: 12-803BP IS NOT TO BE USED WITH MECHANICAL FUEL PUMPS! I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Holley 12-803 Two Port Chrome Fuel Pressure Regulator - 1-4 PSI. 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? It's a diaphram with a spring. 10 in stock. 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? Average for the last 12 months. You would'nt just be reading the inlet pressure would you? The owner had tried all practical means to reduce the heat gain of the fuel system but with little improvement. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. . . . . % i'm trying to figure out why you are running a T when there are two outlets. The two will be very close to the same just as would Water and Anti-Freeze boiled in an open pot.

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