Cool. 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. I feel lucky that this did not damage my generator because at one point I saw 30lbs of pressure while trying to start the generator. 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. Works, don't use a liquid filled gauge in an engine compartment! It works but not as well as some of the off brands like spectre. I wanted to upload the map, but at 2.73mb, it was too big. The higher the RVP, the greater the tendency to vaporize or vapor lock. #2. In refining crude oil they distill it to separate out the different products. Gasoline at the pump is a blend of different chemicals. WARNING! Vapor lock is caused by usually a fuel that vaporizes too easily at too low a pressure (in the line) due to under-hood heat and not enough pressure on it - which would run great if it could make it to the combustion chamber first. There's always a catch with bargains, Reviewed in the United States on July 9, 2022. 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. This diaphragm repair kit is for 12-803 and 12-804 regulators. Please refresh and try again. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. Profile Page . 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. Use with standard pump only - not recommended for maximum pressure pumps. Purchased the regulator from Baxter, unit arrived in 4 days.. The following vehicles are considered Emissions Controlled Vehicles: *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. 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. Holley Fuel Pressure Regulator Rebuild 12-804 - YouTube The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Volatility is a measure of the gasolines tendency to vaporize under a given set of conditions. At first it seemed fine, set it to 1.5 PSI and away we go. Free Shipping - Holley Fuel Pressure Regulators with qualifying orders of $99. Discussion in 'The Hokey Ass Message Board' started by oldrelics, Oct 12, 2010. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. LASTLY on your first issue of understanding vapor lock and boiling point. => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. It takes a lot to hurt today's stainless steel valves, but in an older car be careful - and an exhaust gas temperature gauge is not a bad idea to invest in. Also in Tools, Shop Equipment & Chemicals, Cataclean - Fuel and Exhaust System Cleaner, Cataclean Diesel - Fuel and Exhaust System Cleaner, Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Mr. Gasket Fuel Pressure Gauge - 0-15 PSI - 1-1/2 Inch Diameter, Mr. Gasket Fuel Block with 0-15 PSI Liquid Filled Fuel Pressure Gauge, 25 GPH Holley Mighty Mite Electric Fuel Pump, 1.5-4 PSI, Earl's Fem.1/8" NPT to Male 3/8" NPT Pipe Bushing Reducer. Then I got this good one, to try to get 1.5 PSI to the Kadrons. This product is universal and applies to all vehicles. Does this need to be mounted upright or is it ok on its side? fuel pressure problem - holley blue pump & reg | Hot Rod Forum I have no idea - you are in uncharted territory. 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. Otherwise it's good. 2-Port Carbureted Fuel Pressure Regulator (12-804) by Holley. Reviewed in the United States on September 4, 2017. "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. The owner had tried all practical means to reduce the heat gain of the fuel system but with little improvement. [endif]-->. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. 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. Did not like having to reset to zerobut I did. I appreciate it!! Holley 12 803 instructions - United States manuals Step-by-step Tutorials Add some heavy ends. The carburettor was flooding, the electric pump was still running. They put everything they could into the coal oil including what we would consider low grade gasoline. I would like to try IMCT, how is it sold? . Holley 26-137 Adjustable Secondary Idle Lever 90127547045 | eBay Two Port Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part number. The Holley Fuel Pressure Regulator (Part No. The 12-803 4.5-9 psi spring is plain, (just the gold colored plating) the spring is accessible and replacable The cheap dial units are terrible. You can do a Google search for it, though. The regulator is a Holley 12-804, I was told it went down to 1 psi and I have a stock mechanical fuel pump. [endif]--> Many thanks for taking the time to clarify this interesting subject . Refineries have been doing this for decades. 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. 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. If I wait a hour for the system to cool to ambient temperature then it starts easy. Will buy again if I need another one for a different project. Mounting Bracket Included. 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. Talk to the experts. Never tried it with my old Model A Ford but I heard that they will actually run on Kerosene.. 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. Inlet from fuel pump is at bottom. Click here to find a 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. 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. Rusty said any heavier hydrocarbon WILL raise the boiling point - and I said Rusty is correct and OD is wrong. That's not to say that adding something like kersene won't help, but it can't eliminate the volatile components. Works and does the job. . It is not intended to be sold or used for any other purpose. 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. They use gravity feed from vacuum tank mounted under the hood and directly over the exhaust manifold. Q: I would welcome your advice on this - with apologies for the length of this post. Ships from and sold by Performance Guarantee. http://www.frontieroil.com/attachments/contentmanagers/106/PrdctsSpec_UnleadGasSpecs.pdf. Second, you adjust this regulator by turning the hex screw on top - does anyone happen to know how many pounds one or more full turns would produce etc? My car runs and idles fine with no flooding when running with the electric pump, the flooding only occurred once when it vapor locked. This item cannot be shipped to your selected delivery location. Q: Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. On occasions here in NZ, we get extreme heat and old cars vaporlock. I like the attached simple explanation of the issue. 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. Amazon has encountered an error. So, I take the reg apart to see if it is all clean and looks good. Holley low pressure reg woes #12-804 | The H.A.M.B. 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. It looks like WhatsApp is not installed on your phone. Thinking Kerosene is probably the way I will go at this point. Takes a little time to peel back the rubber case then remove the glass with a fine blade screwdriver, reset to zero. Holley Fuel Pressure Regulators 12-803 HLY-12-803. 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? This is another vexing problem with Ethanol mix, which is about all you can get here in CT. 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. [{"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. Mr. Gasket 1561 Fuel Pressure Gauge 1.500 in. None of them worked. I will be fitting a pressure regulator, it can only help and will have to wait for the next vapor lock to occur to see if it overcomes the flooding. 4.25 out of 5 stars. Worked well out of the box. Kerosene diesel fuel or stove oil will work. . 12-804 Part Type: Fuel Pressure Regulators Product Line: Holley Fuel Pressure Regulators Summit Racing Part Number: HLY-12-804 UPC: 090127020234 Regulator Pressure (psi): 1-4 Regulator Style: Non-return Regulator Location: Inline Boost/Vacuum Reference Port: No Gauge Port: No Inlet Quantity: 1 Regulator Inlet Size: 3/8 in. What you write in post 12 is NOT correct. It IS variable and a result of the various fuel blend components. 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. The first opportunity to try it occurred recently. Brands like MSD, Flowmaster, Hurst, Accel and many more make up the offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and drivers. Try it, I think you will find it works. This satin finish regulator feature 3/8 pipe thread . If so how? It is not all the same. fuel pressure in at the top, fuel pressure out on each side. #1 Holley 12-803 Fuel Pressure Regulator January 16, 2011, 11:41 AM Can it be mounted upside down (adjustment screw pointing down) and still work properly? We tend to speak of pressure as higher or lower than atmospheric however it is a relative measure and pressure applies under all conditions. 4.9. MFG. But, . Holley 12-804 Holley Fuel Pressure Regulators | Summit Racing Overview. Street/Strip Carbureted Applications
