I have a holley low pressure reg. Check the status of your Remember STILL transporting fuels was a dangerous thing - and higher grade fuel could just as easily have exploded on it's way to the fueling station or in those glass top hand operated early gas pumps on a hot day. 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. 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. 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. You would'nt just be reading the inlet pressure would you? Shiny Finish. But, . 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 BP article explains causes - not how to change fuel formulations - so for this discussion it explains nothing. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Q: So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. 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. It needed a bit of adjusting for my purpose, but other than that, it performed perfectly. They put everything they could into the coal oil including what we would consider low grade gasoline. Rich boys replaced their 216 stovebolt 6's with GMC 270 or 302 sixes with a performance "full race" cam. finish) . Does this need to be mounted upright or is it ok on its side? 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. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. . See Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. HWYoF~Ta77[Z4"bG K=yK Prewar cars have very low compression and will run better on gas that has some kerosene added. That's where the pressure was going. 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. . Lots of Chinese Holley 12-803, 804 etc knock-offs are available. Check "Reid Vapor Pressure" in Wikipedia, or similar. This Holley universal low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI. 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. It will meet your needs and deliver great quality at an affordable cost. We work hard to protect your security and privacy. Holley 12-804 low pressure regulator, Weber, jeep etc. 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. (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 seat. I do not have a pressure regulating valve to reduce the pressure from the pump but it works fine with no flooding under normal conditions and I have fitted a modern soft seat to the float cut off needle. Does it come with the hose fittings or to be bought separately? Thanks again fellows, for such informative posts. All petroleum distillates have different chemical properties which change depending on what you mix them with. The fuel pump and fuel line setting top center of the engine was not only in the hottest ambient temp, except for the exhaust manifolds, under the hood they acted as a heat sink transferring heat from the block to the air. use a 1/16 - 1/8" restrictor in the end of your fuel line to see if you can set the pressure then. (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 . This ensures that it's set too low. Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. Too much fuel pressure for a given needle and seat . Gasoline at the pump is a blend of different chemicals. holley blue fuelpump pressure erratic. Please use a different way to share. Holley part number for the kit is 12-807; Summit sells it for about $6. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. There's always a catch with bargains, Reviewed in the United States on July 9, 2022. 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. 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. Adjustable fuel regulation from 1 to 4 psi, 1965 and older U.S. manufactured California Certified vehicles, 1967 and older U.S. manufactured Federally Certified vehicles, 1967 and older Foreign manufactured vehicle, 1966 and newer U.S. manufactured California Certified vehicles, 1968 and newer U.S. manufactured Federally Certified vehicles, 1968 and newer Foreign manufactured vehicle. Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. They sold more gas than coal oil. (Maybe this arrangement was intentional to assist in vaporising the fuels of the day but it is all bad in hot weather with today's fuels). 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 . Spring clothes pins, aluminium foil, wet burlap, etc. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. In those days before 1905 kerosene had a strong piercing odor and coal oil lamps sometimes exploded. So in an open cup the boiling points would also appear the same as water but under pressure the boiling point is different. 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 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. Starting in 1970 leaded gas was taken off the market resulting in the gas we have today. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Seems like the first "RFG" was closer to the old "winter" blend, which had more higher-end distillates so it'd vaporize nicely in cooler weather. wrapped around the fuel lines. [endif]-->