loyalty program All kinds of remedies were tried. 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. The carburettor was flooding, the electric pump was still running. 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. Once the fuel fills up the float bowls in the carburetor and the needles and seats shut, it starts to build pressure, pushing the diaphragm against the adjustment spring under the adjustment screw and allowing the ball to go "up" against the seat, effectively shutting off fuel flow to the carb. No mention of vapor lock issues, but engine de-carbon activities. There is no "chemistry set" method to measure fuel vapor points. Adding some additives can raise the AVERGE boiling point but cannot remove the lower-boiling components, so regardless of what higher ends are present, the initial boiling point will remain that of the most volatile components. Note also that PURE ethylene glycol is also flammable but also miscible with water. Designed using state-of-the-art technology and with customers in mind. 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. ESPECIALLY a 10% ethanol blend - once generically called the gasohol summer blend in that vapor system would really be a problem. Free Shipping - Holley Fuel Pressure Regulators with qualifying orders of $99. 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. 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. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . That's where the pressure was going. I would welcome your advice on this - with apologies for the length of this post. . 03-28-2012, 03:04 AM. Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part number. The check ball is held shut with the diaphragm and spring and once the desired fuel pressure builds up it opens that valve and allows fuel to go back to the tank. This will ensure that the pump will not continue to operate after the engine is . ${cardName} not available for the seller you chose. Street/Strip Carbureted Applications 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. near you The Holley Fuel Pressure Regulator (Part No. Needs you to make/tap your own threads for screws, Reviewed in the United States on February 4, 2023. The vapor lock issues that I have are with 1920's Packards where the fuel system is essentially at atmospheric pressure throughout. It is no different than mixing water with ethylene glycol to make what we call anti freeze or with methanol to make windshield washer fluid - you get a completely different product - it is not just water any more; and nor can you separate them back into their original separate entities - so you cannot think of them that way any more either. I do not think we hi-jacked the thread - the article is not even available anymore online to read. It is a measure, as I understand it, of how readily the fuel will evaporate in open air. We currently do not have an estimate when this item will ship. Holley HOL 12-804 12-804 Fuel Pressure Regulator Brand: Holley 436 ratings | 33 answered questions Amazon's Choice in Automotive Replacement Fuel Injection Pressure Regulators by Holley $4119 FREE Returns Adjustable fuel regulation from 1 to 4 psi .220" (7/32") restriction 3/8" NPT ports ( 1 in, 2 out) Mounting bracket included Pre-set at 2.8 PSI This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Reasonable . Check "Reid Vapor Pressure" in Wikipedia, or similar. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability, Holley HOL 12-804 12-804 Fuel Pressure Regulator. The 12-804 is made from durable aluminum and has a satin chrome finish that is extremely resilient to corrosion and abrasive chemicals. Walk back over and looked again, 9lbs. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports. ***The inlet pressure limitation is 7 psi. 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. Posts: 32372. Copyright 2023, Antique Automobile Club of America. Browse In Stock and Ready to Ship Alternatives, Universal Fit, 1-4 Fuel Pressure Rating (psi), Aluminum. You need to be a member in order to leave a comment. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. Some can be used for either - or. Applications. Refining of oil is basically heating it into vapors and then capturing those vapors various degrees of cooling - at the top is "propane" - at the bottom is "pitch" or "road or roof tar". Please use a different way to share. So, I take the reg apart to see if it is all clean and looks good. Interesting that the writer suggests certain additives can raise boiling point of gas in the first section. 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. Works and does the job. 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. 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. Interesting theory. If I wait a hour for the system to cool to ambient temperature then it starts easy. Holley Manufacturer Part Number 12-804 Manufacturer Holley Assembled Product Dimensions (L x W x H) 3.50 x 3.50 x 2.50 Inches Warranty Warranty information 90 DAY REPLACEMENT IF DEFECTIVE Warnings Warning Text proposition 65 reasons:titanium dioxide, other chemicals WARNING - California Proposition 65 None Report incorrect product information I wanted to upload the map, but at 2.73mb, it was too big. Discussion in 'The Hokey Ass Message Board' started by oldrelics, Oct 12, 2010. Tags: None TheSilverBuick ALMOST Spidey ! Two Port THE SECOND ISSUE - the vapor system on the Packard is going to be a problem no matter what today. Rusty, thanks so much for this information. To add the following enhancements to your purchase, choose a different seller. The higher the RVP, the greater the tendency to vaporize or vapor lock. [endif]--> http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf,