Regulator Box showed signs of being opened and clumsily closed and the advertised Rubber Gasket or Gaskets that were mentioned in the instructions were missing. This product is intended only for the thinning of industrial maintenance coatings. 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 . Can i install a fuel pressure guage on the unit itself? It works but not as well as some of the off brands like spectre. Lots of Chinese Holley 12-803, 804 etc knock-offs are available. This satin finish regulator feature 3/8 pipe thread . 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. 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. Needs you to make/tap your own threads for screws, Reviewed in the United States on February 4, 2023. 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. 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. Product very good. Lower octane will not hurt your car if the compression is low. Is it a product that would be sold by a panel beater's supply shop? Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. Steve_Mack_CT You set it to the exact fuel pressure you want. 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. The 12-803 BP is a By-Pass design of the same style. . Our payment security system encrypts your information during transmission. $12.15: ac000400: Front Axle Beam Bushing Reamer For 1.34 Up To 1.50 Diameter . The seller gratefully sent me a replacement part but the result was the same. Lots of Chinese Holley 12-803, 804 etc knock-offs are available. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Your question might be answered by sellers, manufacturers, or customers who bought this product. Right & left, Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.Learn more how customers reviews work on Amazon. Then, we got what was loosely described as winter gas, all year round, with RFG. 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. Holley HOL 12-804 12-804 Fuel Pressure Regulator. Please refresh and try again. Spring clothes pins, aluminium foil, wet burlap, etc. It needed a bit of adjusting for my purpose, but other than that, it performed perfectly. Amazon has encountered an error. I will be trying one of these but am curious what is the active ingredient(s). 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. 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. Then I got this good one, to try to get 1.5 PSI to the Kadrons. MFG. I would like to try IMCT, how is it sold? I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. Try it, I think you will find it works. May God's grace bless you in the Lord Jesus Christ. % I think we have hijacked Steve's thread where he asked the question about raising the boiling point of gas which hopefully has been fully answered by these side issues. Like many others, I have been considering what to do recently. 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. Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . If I wait a hour for the system to cool to ambient temperature then it starts easy. Shipping was fairly fast. 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.Regulatorhas a 3/8" NPT tapped fuel pressure gauge port and requires reducer 617-6157 to install the gauge. Many thanks for taking the time to clarify this interesting subject . What I would do, is with the car off, (or electric pump off), turn the screw a good ways out. THE SECOND ISSUE - the vapor system on the Packard is going to be a problem no matter what today. 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. Starting in 1970 leaded gas was taken off the market resulting in the gas we have today. All kinds of remedies were tried. As you can see in the photo it's gold, (the same colour as what's in the model 12-803) I called Holley directly and customer service is acting like they're unaware of the issue, even though I've read threads online going as far back as 2018 mentioning this. [endif]-->. 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. Keep in mind that when there is pressure in the line, backing off on the adjustment isn't going to make the pressure go down. Talk to the experts. bowls after each run, just to see exactly at what temperature the problems become apparent. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. In those days before 1905 kerosene had a strong piercing odor and coal oil lamps sometimes exploded. Holley(R) has been the undisputed leader in fuel systems for over 100 years. Pre-set at 2.8 PSI 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. It is a measure, as I understand it, of how readily the fuel will evaporate in open air. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. [endif]-->, . You may receive a partial or no refund on used, damaged or materially different returns. Error posting question. 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 project involved installing a 250LPH electric fuel pump on a relay system and then T off to a bypass line and a fuel pressure regulator on the fuel line going to the generator. Reviewed in the United States on June 20, 2021. Recommended Parts. 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. use a 1/16 - 1/8" restrictor in the end of your fuel line to see if you can set the pressure then. There's always a catch with bargains, Reviewed in the United States on July 9, 2022. Dorman 55241 Fuel Line Filter Kit Universal Fit, EVIL ENERGY 6AN Female to 6AN Female Straight Swivel Coupler Union Fitting Adapter Aluminum Black, Beck Arnley 036-1360 Valve Cover Gasket Set, JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket, Electric Fuel Pump - Compatible with Mercury Marine Carb Models - Mercruiser, 1998 4.3L 262, 2000 5.0L 305, 2000 5.7L 350, MCM/MIE 4.3L V6, 5.0L V8 Gen+ - Replaces 861155A3, 861156A1, 18-8868, UKCOCO Propane Gas Regulator with Pressure Gauge Manometer Level Gauge for BBQ Camping Cookers Caravan Plumber (Green), TEMSONE Adjustable Fuel Pressure Regulator Set Universal EFI FPR with 30-70 Psi Gauge 6AN - 6AN Feed & Return Fuel Line Hose Fitting Connectors Kit Blue & Red, MEANLIN MEASURE 1/4 Inch NPT Air Compressor Regulator with Gauge, 0-150 PSI AR2000 Air Gauge Regulator Inline for Air Compressor and Pneumatic Tools, took a long time to arrive. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Of course you may already have this setup - that is the first issue. the fuel pressure gage needs to be in the line going to carbs. [endif]-->