30 Mar

holley 12 804 adjustment

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. fuel pressure problem - holley blue pump & reg | Hot Rod Forum 9517377223. Fuel Pressure Regulator - Walmart.com They sold more gas than coal oil. Is it a product that would be sold by a panel beater's supply shop? Never tried it with my old Model A Ford but I heard that they will actually run on Kerosene.. Holley HOL 12-886 Regulator, Pressure Regulators - Amazon Canada The issue is simple that one is seeking to "re-blend" their own gasoline from one already sold. 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. 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. I do wish there were some stamped values on the adjustment screw like other models I have seen. By the way, I had an excellent service from this seller (5 stars!). Holly Fuel pressure regulator install | Jeep Enthusiast Forums Holley Fuel Pressure Regulator 12-804 - Advance Auto Parts Bobburns thank you for the confirmation and technical explanation. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. [endif]-->. I am not going to quote all you said, but the flooding from the electric pump was caused by too much fuel pressure over coming the needle seat (or whatever kind of seat it has for the bowl) of the carburetor. 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. Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO", Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia, https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. You can wire a by-pass switch for priming if it is really required. In fractional distillation (the refining of oil) - what we call "mineral spirits", "paint thinner", "kerosene" and "diesel fuel" all ALL "heavier" hydrocarbons (pretty much in that order) than what we call gasoline - in that they occur lower in the distillation tower and condense at lower temperatures back into liquid before what we call "gasoline" does. I cannot help you - and no one can without knowing the exact make up of the gasoline being refined where you are. Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part number. the installation of a Holley 12-810 oil pressure safety switch is recommended for installation into the wiring circuit. 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. Holley 12 803 instructions - United States manuals Step-by-step Tutorials Please use a different way to share. As an example water would boil and thus "vapor lock" at a really low temperature without ethylene glycol. Shipping cost, delivery date, and order total (including tax) shown at checkout. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. 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". By NPT Inlet Attachment: So they started putting more of the low grade gas, or high grade kerosene into the gas. MFG. 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. 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. Holley Fuel Pressure Regulators 12-803 HLY-12-803. The pressure regulator works fine when mounted flat, but should work ok when mounted on it. Yes, you will need to buy the type of connection you want to use such as hose barb, compre. This will ensure that the pump will not continue to operate after the engine is . Find an Automotive Service Professional NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. Sign up for a new account in our community. readings of the carb. So with that vapor fueling system - you are stuck "downgrading it" to a lower quality fuel. But the heavier elements will raise the boiling point of the mixture. . 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. Holley 26-137 Adjustable Secondary Idle Lever 90127547045 | eBay Holley carburetors have powered every NASCAR(R) Sprint(R) Cup team and nearly every NHRA(R) Pro-Stock champion for four decades. Holley 12-804 1-4 Psi Carbureted Two Port Fuel Pressure Regulator: Item #: HLY12-804 : Quantity: Price: $53.99 Add to cart . [endif]-->. US $57.76 Finish:Gold Zinc billet aluminum bracket that conveniently mounts a 12-803 Black anodized 12-804 or 12-803BP fuel pressure regulator utilizing the passenger side carb studs on any 4150 / 4160 style carburetor. For cars that require 4.5 to 9 PSI, the Holley 12-803 is the right model. . May God's grace bless you in the Lord Jesus Christ. This diaphragm repair kit is for 12-803 and 12-804 regulators. Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 for Holley : Amazon.com.au: Automotive Post in the forum instead. 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. Easy to read. It is not intended to be sold or used for any other purpose. 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. We tend to speak of pressure as higher or lower than atmospheric however it is a relative measure and pressure applies under all conditions. 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.Regulator has a 3/8" NPT . 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. LOW PRESSURE REGULATOR 12-804 - Allstate Carburetor Holley HOL 12-804 12-804 Fuel Pressure Regulator I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. Cool. (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 . Mr. Gasket 1561 Fuel Pressure Gauge 1.500 in. the fuel pressure gage needs to be in the line going to carbs. Holley 12-804 - 2-Port Carbureted Fuel Pressure Regulator Copyright 2023, Antique Automobile Club of America. Take a look at the article below. One needs to have studied Chemistry as I have to actually know how this works. From start to finish, Holley has the parts to make your dream a reality. Thanks again fellows, for such informative posts. Please refresh and try again. This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles. and a rotary click style one here on the shelf pete, you are welcome to borrow them to troubleshoot your problem.. let me Know. Generally speaking if your car was made before 1953 it has low compression. This ensures that it's set too low. We encountered an error while updating this page. A long time ago it was in use in the oil business. I can only say acetone will lower flash point (light easier) but also lower auto-ignition temperature and thus create knock into too much of a quantity - while a very little bit will raise octane but not lower auto-ignition - so if you go TOO low with kerosene or diesel you can bring back some kick to the fuel with SMALL amounts of acetone. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have. Holley 12-804 Fuel Pressure Regulator | Fuel Pump Shop The 12-804 is made from durable aluminum and has a satin chrome finish that is extremely resilient to corrosion and abrasive chemicals. Is there a brand name? The Holley 12-804 fuel pressure regulator is adjustable from 1-4 psi. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability, Holley HOL 12-804 12-804 Fuel Pressure Regulator. The unit however is working fine but am curious about the missing gaskets and how important they are? Can you adjust the fuel pressure? At first it seemed fine, set it to 1.5 PSI and away we go. When it burns however, it is an eye and throat irritant, even though it raises octane, burns hotter, easier, and cleaner. . The seller gratefully sent me a replacement part but the result was the same. Holley 12-804 Fuel Pressure Regulator Installation Instructions . To ensure this condition, the installation of a Holley 12-810 oil pressure safety switch is recommended Works and does the job. PDF Holley 12-803BP Fuel Pressure Regulator Installation Instructions - JEGS It's unlikely that anything's stuck. Boiling is a violent version of vaporizing. Holley HOL 12-804 12-804 Fuel Pressure Regulator Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. 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. Rusty, thanks so much for this information. Gasoline was so light if you left the cap off a gallon can it would all evaporate in a few days. The two will be very close to the same just as would Water and Anti-Freeze boiled in an open pot. ). The chemistry class experiment you are referring to will yield the approximate boiling (vapor) point at STP - Standard Temperature and Pressure ONLY. i'm trying to figure out why you are running a T when there are two outlets. 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. ***The inlet pressure limitation is 7 psi. WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. Usually, just runs really lean for a couple of minutes, and will not go above idle until fresh fuel finally clears through. 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. Some have reported more power, easier starting and cooler running especially in very low compression cars of the twenties and early 30s. 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. Kerosene diesel fuel or stove oil will work. Holley low pressure reg woes #12-804 | The H.A.M.B. Just open the hood and let things cool. Q: I will be trying one of these but am curious what is the active ingredient(s). Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. The lower I can get with this pressure is 3.5 psi (at max adjustment). 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. Call 800.979.0122, 7am-10pm, everyday. If so how? 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. 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. 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". neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . It's easy! THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING THE . Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Copyright 2023, Antique Automobile Club of America. Wouldn't the water still evaporate at the same temp? 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'm still looking for the reg in this pic. By 1913 it was the other way around. Product very good. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. 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 does however produce an irritating fume that irritates the eyes and mucous membranes when burning in gasoline. 3/8 Inch NPT Ports 1 Inch 2 Out. . Holley Fuel Pressure Regulator 12-804 | O'Reilly Auto Parts Does this need to be mounted upright or is it ok on its side? here's one installed,same holley low pressure regulator, line pressure in the top, one side is hooked to the fuel pressure sender, other to the line going to the fuel block. 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. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. Open the unit and check the spring color, Reviewed in the United States on April 9, 2018. 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. Log In / Register Order Status. Amazon has encountered an error. A vapor lock condition would be caused. 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. Much of the excess engine heat will end up soaking the fuel system under the hood. As Raywith pointed out, you need to let the pressure go somewhere. 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.