A long time ago it was in use in the oil business. It is not intended to be sold or used for any other purpose. I put it . If the carbs are drawing fuel and you lower the pressure at the reg, it should show on the gauge. 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. Full content visible, double tap to read brief content. Add some heavy ends. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. It's unlikely that anything's stuck. Click here to find a It looks like WhatsApp is not installed on your phone. Holley recommends applying PTFE paste to the NPT thread of the fittings before installation on these applications. Shop Fuel Pressure Regulators at Summit Racing. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. TURNING THE ADJUSTMENT SCREW ALL THE WAY IN WILL RESULT IN EXCESSIVE FUEL PRESSURE . . Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part Great product from holley, but these do not come with the supplied tap that's suppose to be in box for the 2 machine screws that mount the regulator to the bracket. Powered by Invision Community, http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf. THE SECOND ISSUE - the vapor system on the Packard is going to be a problem no matter what today. Part #: 12-807. . If I wait a hour for the system to cool to ambient temperature then it starts easy. Putting kerosene into gasoline - while both are hydrocarbons - and they will blend - the lighter oil nature of the kerosene to the solvent of gasoline; in an amount of 5% is not enough to change the STP vapor point of the gasoline, but it will weaken the octane rating of the gasoline enough to feel it under acceleration AND under pressure will raise the vapor point enough to perhaps prevent vapor lock depending on the ambient and under hood temperatures of where one is located. Please use a different way to share. In fact I can completely remove the adjusting screw and it still does not go down to 3psi. Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO", Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia, https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. Talk to the experts. Its a bypass arrangement with non return valves to prevent reverse flow and is operated by a switch for use in event of vapor lock. For cars that require 4.5 to 9 PSI, the Holley 12-803 is the right model. The Holley 12-804 is a 1 to 4 range PSI regulator. One needs to have studied Chemistry as I have to actually know how this works. Does it come with the hose fittings or to be bought separately? Holley 12-807 Fuel Pressure Regulator Diaphragm Repair Kit made by Holley, for as low as $9.21. We are sorry. We dont share your credit card details with third-party sellers, and we dont sell your information to others. 4.25 out of 5 stars. Chemistry does NOT work that way - just like adding more any one ingredient to a cake mix will make the cake better. I am not going to quote all you said, but the flooding from the electric pump was caused by too much fuel pressure over coming the needle seat (or whatever kind of seat it has for the bowl) of the carburetor. 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. finish) . One is a deadhead and one is a by-pass. the fuel pressure gage needs to be in the line going to carbs. Most certainly also, should that be successful, I will then experiment with IMCT as well. 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. Overview. Holley 12-804 Holley Fuel Pressure Regulators JEGS 41040 JEGS Fuel Pressure Gauges Now you need fittings. Steve_Mack_CT couple more questions, Rusty, what exactly are "heavy ends"? It is not all the same. Much of the excess engine heat will end up soaking the fuel system under the hood. Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. ). I do not think we hi-jacked the thread - the article is not even available anymore online to read. There is no hard and fast cutoff for any of these. In a deadhead design the fuel comes into the regulator from the bottom past a check ball which is held open by a pin on the diaphragm. I have already been thinking about switching over to a modern fuel pump, say the Mallory 110, plumbing in a regulator just downstream of the carbs, and taking the bypass fuel back to the fuel tank. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. A quart of diesel added to the gas tank solves the problem without any more in side effects than a slight smell from the exhaust. This part is Backordered. 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. Chrome Finish. The other part numbers utilize an AN O-ring inlet, outlet, & return ports, and do not require any sealer on the threads. Designed using state-of-the-art technology and with customers in mind. Holley(R) has been the undisputed leader in fuel systems for over 100 years. Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. I did, works great & looks beautiful. 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. I take this to mean that the separate boiling points of the constituents occur at atmospheric pressure but at higher pressure the resulting mix has a single boiling point. 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 . I like the attached simple explanation of the issue. http://www.frontieroil.com/attachments/contentmanagers/106/PrdctsSpec_UnleadGasSpecs.pdf. Shopping Cart Works, don't use a liquid filled gauge in an engine compartment! Q: Copyright 2023, Antique Automobile Club of America. 03-28-2012, 03:04 AM. Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. 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. Works and does the job. Joined: Apr 7, 2008 Posts: 1,727. Can anyone speak to the validity of this or is anyone currently using an additive for this? LOW PRESSURE REGULATOR 12-804 quantity. It will meet your needs and deliver great quality at an affordable cost. 12-804 12-500 Low-Pressure Fuel Regulator (std. 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. . You can do a Google search for it, though. [endif]-->
