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. Part #: 12-807. . 12-804) is a Low Pressure (1-4 PSI) regulator. You set it to the exact fuel pressure you want. Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . Otherwise it's good. finish) . This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles. Is it a product that would be sold by a panel beater's supply shop? I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. I have no idea - you are in uncharted territory. Auto Parts v 6c02f45cd (2fvgn) cv1440. He finally achieved significant improvement by fitting a vent to the carburettor top (which is routed away and under the car for safety). This satin finish regulator feature 3/8 pipe thread . Ships from and sold by Performance Guarantee. The 12-804 is made from durable aluminum and has a satin chrome finish that is extremely resilient to corrosion and abrasive chemicals. [endif]--> Many thanks for taking the time to clarify this interesting subject . It does however produce an irritating fume that irritates the eyes and mucous membranes when burning in gasoline. Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. [endif]--> http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf, , . It is not all the same. Holley 12-804 Holley Fuel Pressure Regulators JEGS 41040 JEGS Fuel Pressure Gauges Now you need fittings. You refer to the problem of the additive increasing the propensity for the fuel to self ignite however in my case the compression ratio of the cars is so low (around 4 : 1) that I doubt that it would be a problem. This Holley universal low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI. Lots of Chinese Holley 12-803, 804 etc knock-offs are available. Reviewed in the United States on January 15, 2021. 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.