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. ***The inlet pressure limitation is 7 psi. Q: ${cardName} not available for the seller you chose. Fuel pump regulator has 3/8" NPT inlet/outlet ports. 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 . I have a holley low pressure reg. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . Overview. The Holley 12-804 is a 1 to 4 range PSI regulator. What if any additives would do this and why? 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. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. I prefer to keep things simple but I appreciate the more correct technical approach. Enhancements you chose aren't available for this seller. I still suspect the flooding was due at least in part to fuel boiling in the carburettor bowl and venting the vapor above the float could assist. For over a century Holley has driven the cutting edge of fuel-system design. Wouldn't the water still evaporate at the same temp? . If you put in too much you can return the fuel to some "kick" without knock with a small amount of acetone. The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. [endif]-->. near you ", So . Gasoline was so light if you left the cap off a gallon can it would all evaporate in a few days. Shipping cost, delivery date, and order total (including tax) shown at checkout. Applications. the cause for your fuel pressure fluxuation is because the fuel pressure is bumping up against the regulator and the extra fuel has no where to go , the quick fix is run a return line . By Note also that PURE ethylene glycol is also flammable but also miscible with water. $41.19. There was a problem completing your request. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. Our payment security system encrypts your information during transmission. They sold more gas than coal oil. 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? CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. 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. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Recommended Parts. It was about this time that car makers lowered the compression ratios, went to long stroke motors, and developed hot spots and vaporizers on their intakes to burn the new low grade or low octane gas. Steve_Mack_CT Holley(R) has been the undisputed leader in fuel systems for over 100 years. Does this need to be mounted upright or is it ok on its side? Got a gauge on the FPR to monitor, and at first it was great. 1 oz per gallon - not more than 2 is usually in the right "goldie-locks" range. LOW PRESSURE REGULATOR 12-804 quantity. Holley 12-804 Holley Fuel Pressure Regulators JEGS 41040 JEGS Fuel Pressure Gauges Now you need fittings. So they started putting more of the low grade gas, or high grade kerosene into the gas. Great feedback from a knowledgeable group, guys! Call 800.979.0122, 7am-10pm, everyday. Just open the hood and let things cool. Fuel Pressure Regulators Instruction Sheet (42712804), Designed to be used with standard pump only, Measures 2-1/2" wide and 1-1/2" tall and deep, This low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI, It includes mounting bracket with 2 each self-tapping screws for regulator to bracket installation purposes and 3 screws for bracket to vehicle installation, 1-3/4" hole spacing to mount the regulator to the bracket. 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. Yes you can adjust fuel pressure with this regulator. As the car is parked Temperature. 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. In some areas, according to the map, RVP can vary from about 7.0 to 9.0 in some of the fuels. For now, in 70 degrees ambient, the bowls are 100 F. at shut-down and after 15 minutes they rise to 115 F. At these temperatures the engine starts back up fine, but I believe another ten degrees will be in the problem zone. The Holley 12-804 fuel pressure regulator is adjustable from 1-4 psi. 4.25 out of 5 stars. We encountered an error while updating this page. What we call gasoline - as Rusty showed; is blended today - and the various chemicals blended into it for the various regions and state laws make it a special product where you BUY it. I'm suggesting to raise the boiling point by adding heavier or oilier substances such as kerosene. 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. Was actually disappointed with the quality of the regulator. 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. They put everything they could into the coal oil including what we would consider low grade gasoline. Holley 12-804 Fuel Pressure Regulator 3/8 pipe thread ports 7/32 restriction Pressure ranges from 1 to 4 PSI Includes mounting bracket Satin finish 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. Privacy Policy. I put it . 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! Decrease pressure by turning the adjustment screw counter-clockwise. 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. Terms of Service. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. You can do a Google search for it, though. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. [endif]-->. 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. 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