Going to check my VW bus fuel pump pressure. So - you cannot just say whether it will work or not. Holley recommends applying PTFE paste to the NPT thread of the fittings before installation on these applications. NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. Add some heavy ends. It seemed to work fine for a while after I dialed it into 2psi at idle, but now it reads 6psi and it won't adjust down to 3psi. My plan was to install a fuel pressure regulator on the line going to the generator so that the bypass valve needs less fine tuning to maintain the same pressure in all temperatures. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. . I had hoped that the cooler fuel from the electric pump would solve the problem but it did not. loyalty program Privacy Policy. This will keep your pressure steady and have instant pressure change when adjusting. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. Some cars are much more apparent to vapor locking than others, I"ve never experienced here in NJ with either of my older Packards which see all kind of hot summer driving conditions. i'm trying to figure out why you are running a T when there are two outlets. Click here to find a Quadrajets should have 6 to 9 at the inlet or they flood past the needle seats. Includes initial monthly payment and selected options. 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. There is no "chemistry set" method to measure fuel vapor points. If so how? Regulator Box showed signs of being opened and clumsily closed and the advertised Rubber Gasket or Gaskets that were mentioned in the instructions were missing. The unit however is working fine but am curious about the missing gaskets and how important they are? I did, works great & looks beautiful. I would welcome your advice on this - with apologies for the length of this post. and a rotary click style one here on the shelf pete, you are welcome to borrow them to troubleshoot your problem.. let me Know. 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 Holley 12-804 Fuel Pressure Regulator Brand: Holley 415 ratings -11% $6614 Was: $73.94 3/8" pipe thread ports 7/32" restriction Pressure ranges from 1 to 4 PSI Includes mounting bracket Satin finish See more product details + + Total price: $115.81 Add all three to Cart These items are shipped from and sold by different sellers. 03-28-2012, 03:04 AM. Wouldn't the water still evaporate at the same temp? Installation was made more complicated by the absence of a port for a pressure gauge, which means Another thing you can do is wire the fuel pump to be hot in run and start through an oil pressure switch - so if the motor shuts off or looses oil pressure the fuel pump shuts off too. Accurate description. I adjust it up to 2.5 pounds and clean my hands. . Some parts are not legal for use in California or other states with similar regulations. That work continues today through Holleys EFI products as well as through Holleys family of brands. Steve_Mack_CT Will buy again if I need another one for a different project. 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. You can wire a by-pass switch for priming if it is really required. The Holley 12-804 is a 1 to 4 range PSI regulator. 4.9. Gasoline vaporizes according to fuel system pressure. What you write in post 12 is NOT correct. Holley's instructions say, ". I still think they sent you the high pressure one. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. A larger tank might need two quarts. Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. 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. You need to be a member in order to leave a comment. If youre looking to dial it in accurately its not going to do it. 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.". With this set up, pressures throughout system varies only very slightly from atmospheric, lower up to the vacuum tank and higher in the gravity feed from the vacuum tank to the carburettor. In the later 1960s, it was somewhat common for people who were going on vacation, in the summer, to add a gallon or two of diesel to a full tank of gasoline for their trip. Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . But, . . This part is Backordered. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. We are sorry. Please try again. Eligible for Return, Refund or Replacement within 30 days of receipt. Applications. That's not to say that adding something like kersene won't help, but it can't eliminate the volatile components. I found this document on my local Oil Refinery's web site and it may help explain some of the problems with vapor lock and hard start. Shipping cost, delivery date, and order total (including tax) shown at checkout. Adjustable from 1 to 4 PSI. 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 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. Needs you to make/tap your own threads for screws, Reviewed in the United States on February 4, 2023. 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 How much should I add to every gallon of gas.I believe they are adding about 5% ethanol to the fuel here. LOW PRESSURE REGULATOR 12-804 quantity. Thus the "lowest boiling point are the cause of vapour lock" is also NOT CORRECT thinking. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. Free shipping for many products! Reviewed in the United States on January 15, 2021. Boy am I glad to have happened on this thread. ***The inlet pressure limitation is 7 psi. What if any additives would do this and why? Works, don't use a liquid filled gauge in an engine compartment! A vapor lock condition would be caused. Then I got this good one, to try to get 1.5 PSI to the Kadrons. The term heavy ends may be old fashioned and obsolete. On the Holley 12-804 fuel pressure regulator, the factory preset is supposed to be 2.8 pounds - can anyone say is Holley usually pretty accurate on these presets? Holley(R) has been the undisputed leader in fuel systems for over 100 years. (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). This will ensure that the pump will not continue to operate after the engine is . Shiny Finish. 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Never tried it with my old Model A Ford but I heard that they will actually run on Kerosene.. [endif]-->,
