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 . TURNING THE ADJUSTMENT SCREW ALL THE WAY IN WILL RESULT IN EXCESSIVE FUEL PRESSURE . Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing. I cannot help you - and no one can without knowing the exact make up of the gasoline being refined where you are. . 3/8 pipe thread ports; 7/32 restriction; . By Easy to read. CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. The other part numbers utilize an AN O-ring inlet, outlet, & return ports, and do not require any sealer on the threads. One is a deadhead and one is a by-pass. I do not think we hi-jacked the thread - the article is not even available anymore online to read. Interesting theory. Tags: None TheSilverBuick ALMOST Spidey ! Holley 804 fuel pressure regulator install - YouTube 0:00 / 5:58 Holley 804 fuel pressure regulator install Schnebs Garage 2.42K subscribers Join Subscribe 72 Share Save 15K views 3 years ago. The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. Holley HOL 12-804 12-804 Fuel Pressure Regulator. 3 0 obj <>stream . You could arrange them on a scale from naptha gas, gasoline, kerosene, stove oil, diesel fuel, light lubricating oil, heavy lubricating oil, grease, asphalt. 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. Use with standard pump only -not recommended for maximum pressure pumps. The BP article explains causes - not how to change fuel formulations - so for this discussion it explains nothing. WARNING! For the best experience please upgrade or visit the site on another browser. bowls after each run, just to see exactly at what temperature the problems become apparent. Needs you to make/tap your own threads for screws, Reviewed in the United States on February 4, 2023. 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. Fuel pump regulator has 3/8" NPT inlet/outlet ports. I have found IMCT is a happy medium that does both in the right quantities - raise boiling point and octane just enough to be a "goldie-locks" kind of additive to help prevent vapor lock. ***The inlet pressure limitation is 7 psi. It is as said - of the "paint thinner" family in weight with ehtyl acetate blended in to make it's solvency properties a little "hotter " and stronger. 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! Features: Adjustable fuel regulation from 1 to 4 psi .220" (7/32") restriction 3/8" NPT ports ( 1 in, 2 out) Chrome finish Mounting bracket included Pre-set at 2.8 PSI About Holley store To see our price, add these items to your cart. That is why fuel injection systems push usually 45 to 60 psi on the fuel at all times with a by-pass line - to keep it liquid and keep it moving - so it cannot turn to vapor in the lines. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. Privacy Policy. I Have problems with the fuel temp in my 1937 Buick. Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part number. Please try again later. Holley part number for the kit is 12-807; Summit sells it for about $6. 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's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. Gasoline was so light if you left the cap off a gallon can it would all evaporate in a few days. In theory the vapor carburetor was the way to go in that day - with lower flash point fuels like poor grade fuels that all pretty much resembled the weight of kerosene in that early day of motor fuels. order Use with standard pump only - not recommended for maximum pressure pumps. He finally achieved significant improvement by fitting a vent to the carburettor top (which is routed away and under the car for safety). Check "Reid Vapor Pressure" in Wikipedia, or similar. A: IMCT is a "new product" from Klean-Strip they call "Industrial Maintenance Coating Thinner" that provides good solvency and can be used in place of MEK, Toluene, Xylene and VM&P Naphtha for thinning Industrial Maintenance Coatings. 12-804 12-500 Low-Pressure Fuel Regulator (std. HWYoF~Ta77[Z4"bG K=yK The only difference that the Holley tech told me between the two springs is the color. . Why does this occur only under increased pressure? Talk to the experts. I've had some luck using LeadMax2000 but it's not a 100% cure. If this is true, how come adding antifreeze to water raises the boiling point? near you 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. 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. When I got it to down to 30 - then the 0-15 psi reg would not hold anymore and climbed to 15 flooding out the engine. 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. It makes no discernible difference to power but if the conditions are sufficiently adverse it will still vapour lock and then you just have to wait until it cools. Yes. finish) . You may receive a partial or no refund on used, damaged or materially different returns. The carburettor was flooding, the electric pump was still running. What I would do, is with the car off, (or electric pump off), turn the screw a good ways out. In answer to Rusty's comment about adding anti freeze to water, the difference is that water is only one material, H2O, with a single boiling point (varied only by pressure). This Holley FPR (12-804) use to be a perfect choice to solve the "too much fuel pressure" produced by the aftermarket fuel pumps on vintage VW. We dont share your credit card details with third-party sellers, and we dont sell your information to others. Some can be used for either - or. The owner had tried all practical means to reduce the heat gain of the fuel system but with little improvement. Exclusive, high-quality Global Featured Holley Transmission Kickdown Cable Bracket 20-121; Gold Zinc Steel for 700R4 . All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. . The other possibility is that it is due to the higher pump pressure. I switched on the electric pump and it instantly picked up and ran for a few seconds then reverted to the classic vapor lock symptoms. Inlet from fuel pump is at bottom. 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. 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. Too much anti-freeze - (typically ethylene glycol) causes the opposite effect even under pressure of the cooling system. [endif]-->. There are two kinds and they look the same. Regards, Mike. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. The Holley 12-804 is a 1 to 4 range PSI regulator. A: Depending what your compression is you could add 5% kerosene up to 25% for cars from the 20s with very low compression, like 5:1 or less. In the early days of the oil business the demand was for kerosene or coal oil. 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. Average for the last 12 months. This part is Backordered. 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. From that time on octane ratings slowly rose, helped by the addition of more and more tetraethyl lead. f9vxY"IpBQ? The reliable, albiet slower, stovebolts never suffered vapor lock because the fuel pump and lines were up front in the airstream of the engine fan. Had to reset to Zero. use a 1/16 - 1/8" restrictor in the end of your fuel line to see if you can set the pressure then. So they started putting more of the low grade gas, or high grade kerosene into the gas. . So - you cannot just say whether it will work or not. Never tried it with my old Model A Ford but I heard that they will actually run on Kerosene.. You need to be a member in order to leave a comment. I am intrigued by you statement, "Once these chemicals are blended - the over-all resulting chemical properties - especially boiling point under pressure is changed - they are NO LONGER SEPARATE boiling points in play.". Profile Page . CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Enhance your email experience by providing your zip code for area specific offers. Sorry, we were unable to perform your search at this time. September 21, 2010 in Technical. Holley's instructions say, ". [endif]-->