holley 12 804 adjustment

I have a holley low pressure reg. I turned into a side street and opened the hood. Please try again later. readings of the carb. That's where the pressure was going. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. I did, works great & looks beautiful. 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. Part Number: HLY-12-803. That work continues today through Holleys EFI products as well as through Holleys family of brands. One is a deadhead and one is a by-pass. 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. Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part number. Product very good. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. Copyright 2008-2023 OReilly But, . [endif]-->. . 0 I realize this is an old post - but when people write things that are WRONG - it leaves the next Joe who comes along thinking that is the correct answer when especially in this case - it is NOT. . Purchased the regulator from Baxter, unit arrived in 4 days.. Steve_Mack_CT 9 really is max. Holley HOL 12-804 12-804 Fuel Pressure Regulator. Typically there are "winter" and "summer" blends with different vapor pressures to promote atomization at cold temps and to discourage vapor lock at hot temps. Holley Fuel Pressure Regulator Rebuild 12-804 - YouTube 0:00 / 37:53 Holley Fuel Pressure Regulator Rebuild 12-804 DurocShark 309 subscribers Subscribe 10K views 3 years ago I walk through. How much should I add to every gallon of gas.I believe they are adding about 5% ethanol to the fuel here. Auto Parts v 6c02f45cd (2fvgn) cv1440. Wont be good for a finicky carb. There is no hard and fast cutoff for any of these. This satin finish regulator feature 3/8 pipe thread . I ordered the 12-804 regulator online because I couldn't find one locally, this is for an engine on a piece of equipment that I make my living with. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. If youre looking to dial it in accurately its not going to do it. It is an experimental thing and MORE IS NOT BETTER - less is better until you find the happy medium based the fuel you buy or have in the tank already. Boy am I glad to have happened on this thread. Thanks to all contributors, particularly the information from Rusty, Bob and David. 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. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. 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. ", So . . Also I fitted a modern soft seat to the carburettor to assist in shutting off the higher pressure from the pump - the original shut off is a brass tapered needle on a brass seat. At first it seemed fine, set it to 1.5 PSI and away we go. Much of the excess engine heat will end up soaking the fuel system under the hood. 3 0 obj <>stream I appreciate it!! The only difference that the Holley tech told me between the two springs is the color. finish) . MFG. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. In this document is a chart for Seasonal Gasoline Specifications. So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. I recently fitted an electric fuel pump to one of the cars. . Our payment security system encrypts your information during transmission. Part #: 12-807. . To see our price, add these items to your cart. . The Holley 12-804 is one of the most popular low fuel pressure regulators that works perfectly for setups that require 1 to 4 PSI. 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 issue is simple that one is seeking to "re-blend" their own gasoline from one already sold. Reviewed in the United States on April 2, 2022. Also, what is it about Kerosine, and possibly the products like LeadMx or Marvel Mystery Oil (mentioned specifically in the article) that drive some improvement? 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 just this Spring started taking temp. Will rise to above 180 degrees on the Temperature gauge. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. What you write in post 12 is NOT correct. I do wish there were some stamped values on the adjustment screw like other models I have seen. 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. The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles: WARNING: It is against the law to install this part on an Emissions Controlled Vehicle. 12-804 12-500 Low-Pressure Fuel Regulator (std. In fact I can completely remove the adjusting screw and it still does not go down to 3psi. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Profile Page . Like many others, I have been considering what to do recently. I have no idea - you are in uncharted territory. Holley 12-840 4.5-9 PSI Adjustable Billet Fuel Pressure Regulator with 3/8" NTP Ports,Black Anodized Brand: Holley 24 ratings | 11 answered questions $10902 & FREE Returns The package length is 9.652 centimeters The package height is 6.604 centimeters The package width is 9.144 centimeters Package Weight : 0.2 pounds See more product details 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. CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. It IS variable and a result of the various fuel blend components. Check "Reid Vapor Pressure" in Wikipedia, or similar. None of these contain lead and so should not damage a catalytic converter if you have one, HOWEVER too much IMCT will prolong the burn and may result in unburnt - STILL burning HOT gas being exhausted in the exhaust cycle. What if any additives would do this and why? if you run a holley blue pump it is set at 14psi from the factory and you must run the regulator that came with the pump . Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. You may receive a partial or no refund on used, damaged or materially different returns. 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 . the cause for your fuel pressure fluxuation is because the fuel pressure is bumping up against the regulator and the extra fuel has no where to go , the quick fix is run a return line . $41.19. The Holley Fuel Pressure Regulator (Part No. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. If you have it plumbed up "dead headed", lowering the pressure might not react very quickly. ;b DK%*DO[%A IPd?Q~]=n1)E1D*q`D fF-"4N3i4\1uOn(@%c0IHQg`~uKVf{/r0d2}XVXi1-tpE1K[T*3"IS0v27UfTajff`"(dJD0fFlvryT{?:VUusSqD?R$LlalK&@$8q'qbSEv [endif]--> Many thanks for taking the time to clarify this interesting subject . Regards, Mike. So they started putting more of the low grade gas, or high grade kerosene into the gas. Q: Steve, gasoline isn't a single chemical compound but a mixture of hundreds of individual chemical compounds which have a large range of boiling points. I still suspect the flooding was due at least in part to fuel boiling in the carburettor bowl and venting the vapor above the float could assist. I have used up to 20% kerosene with no discernible change and have spoken to people who told me that years ago on farms these old cars would run fine if started on gasoline then switched to 100% kerosene. Reasonable . Interesting that the writer suggests certain additives can raise boiling point of gas in the first section. Walk back over and looked again, 9lbs. 4.9. 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". Eligible for Return, Refund or Replacement within 30 days of receipt. 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. The Holley 12-804 fuel pressure regulator is adjustable from 1-4 psi. Add to cart. P/N 12-803, 12-803BP, & 12-804 Installation Instructions 199R7914-3 NOTE: 12-803BP IS NOT TO BE USED WITH MECHANICAL FUEL PUMPS! Reviewed in the United States on June 20, 2021. Holley 12-803 Two Port Chrome Fuel Pressure Regulator - 1-4 PSI. Spring clothes pins, aluminium foil, wet burlap, etc. You can wire a by-pass switch for priming if it is really required. I mix Industrial Maintenance Coating Thinner (IMCT) around 1 oz per gallon - which is basically a blend of petroleum distillate in the paint thinner / mineral spirits (once called also "white gas") family and ethyl acetate and not only does it cure vapor lock it increases octane because you can feel it in the power and acceleration. You would'nt just be reading the inlet pressure would you? I had hoped that the cooler fuel from the electric pump would solve the problem but it did not. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. 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. Gasoline at the pump is a blend of different chemicals. Shiny Finish. May God's grace bless you in the Lord Jesus Christ. couple more questions, Rusty, what exactly are "heavy ends"? ${cardName} not available for the seller you chose. We work hard to protect your security and privacy. As an example water would boil and thus "vapor lock" at a really low temperature without ethylene glycol. In refining crude oil they distill it to separate out the different products. Privacy Policy. [endif]-->