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Holley 12-804 Fuel Pressure Regulator - amazon.ca 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. Plain WATER has great cooling properties, but under pressure will boil at a lower temperature than anti-freeze mixed with water - up to a certain point. Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . 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? Terms of Service. . None of them worked. The issue is simple that one is seeking to "re-blend" their own gasoline from one already sold. Holley 804 fuel pressure regulator install - YouTube You'll find they both have the same initial boiling point - been there and done it. If yes what size should I, A: Holley 12-804 1-4 Psi Carbureted Two Port Fuel Pressure Regulator i'm trying to figure out why you are running a T when there are two outlets. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. The Holley Fuel Pressure Regulator (Part No. 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. ${cardName} unavailable for quantities greater than ${maxQuantity}. Any thoughts on this? LASTLY on your first issue of understanding vapor lock and boiling point. TURNING THE ADJUSTMENT SCREW ALL THE WAY IN WILL RESULT IN EXCESSIVE FUEL PRESSURE . Holley HOL 12-886 Regulator, Pressure Regulators - Amazon Canada Brief content visible, double tap to read full content. YES the boiling point of gasoline can be raised (or lowered) by an additive - depending on what it is - as can the autoignition temperature which will increase "knock" - using the right additive for the fuel you just bought and put in your tank is the trick and it is always going to be hit and miss - depending on what refinery produced the gasoline in the first place. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holleys commitment to its customers and their cars is at the core of everything we do. The 12-803 BP is a By-Pass design of the same style. I have adjusted a 6-9 lbs pump down. Most certainly it will be my plan to fully explore the possibility of "treating the Fuel", with hopes that diesel fuel will make just enough difference to avoid any re-engineering. 3 0 obj <>stream So, I take the reg apart to see if it is all clean and looks good. The issue is boiling points UNDER PRESSURE we are talking about here - though the BP article speaks to other issues of engine and carburetor design contributing to the vapor lock problem. #2. 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. Exclusive, high-quality Global Featured Holley Transmission Kickdown Cable Bracket 20-121; Gold Zinc Steel for 700R4 . The seller gratefully sent me a replacement part but the result was the same. This item cannot be shipped to your selected delivery location. OD says the Boiling point of gasoline cannot be raised by adding a heavier hydrocarbon - such as kerosene or diesel - and points to a high school chemistry class experiment as his proof. Can you adjust the fuel pressure? All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. I am having problems understanding why you say OD is wrong and Rusty is correct, it seems to me you are all saying much the same and that is that gasoline is made up of many components each having different boiling points and the components with the lowest boiling point are the cause of vapour lock. Somewhat of an inconvenience but that's why it's probably cheaper than other places selling the same part number. Much of the excess engine heat will end up soaking the fuel system under the hood. 4.25 out of 5 stars. This Holley FPR (12-804) use to be a perfect choice to solve the "too much fuel pressure" produced by the aftermarket fuel pumps on vintage VW. Auto Parts v 6c02f45cd (2fvgn) cv1440. Gasoline vaporizes according to fuel system pressure. It is not intended to be sold or used for any other purpose. It appears this one needs 40 to 50 minimum. Please try again. Of course you may already have this setup - that is the first issue. 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. Walk back over and looked again, 9lbs. It's easy! This experience ties with that the owner of a very early Twin Six Packard. Fuel Pressure Regulator; Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. The BALL shuts off the fuel flow until the pressure on the other side of it lets fuel get past it to keep the pressure constant. 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. So this thread has been a great find for me particularly at this time. To see our price, add these items to your cart. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. For now, in 70 degrees ambient, the bowls are 100 F. at shut-down and after 15 minutes they rise to 115 F. At these temperatures the engine starts back up fine, but I believe another ten degrees will be in the problem zone. 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 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. Please choose a different delivery location. finish) . . Holley 26-137 Adjustable Secondary Idle Lever 90127547045 | eBay 3/8Inch Npt Ports 1 Inch 2 Out. [endif]-->. Point and secure it into a clean container Inlet pressure of 7 psi limitation means your pump can not put out more than 7 psi to the regulator for it to properly operate. 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. There's always a catch with bargains, Reviewed in the United States on July 9, 2022. Holley 12-804 Adjustable Fuel Pressure Regulator, 1-4 PSI - Speedway Motors The other part numbers utilize an AN O-ring inlet, outlet, & return ports, and do not require any sealer on the threads. 12-804 Part Type: Fuel Pressure Regulators Product Line: Holley Fuel Pressure Regulators Summit Racing Part Number: HLY-12-804 UPC: 090127020234 Regulator Pressure (psi): 1-4 Regulator Style: Non-return Regulator Location: Inline Boost/Vacuum Reference Port: No Gauge Port: No Inlet Quantity: 1 Regulator Inlet Size: 3/8 in. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. When it burns however, it is an eye and throat irritant, even though it raises octane, burns hotter, easier, and cleaner. Shop Fuel Pressure Regulators at Summit Racing. 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 => https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. Some parts are not legal for use in California or other states with similar regulations. If you put in too much you can return the fuel to some "kick" without knock with a small amount of acetone. I feel lucky that this did not damage my generator because at one point I saw 30lbs of pressure while trying to start the generator. Call 800.979.0122, 7am-10pm, everyday. You may receive a partial or no refund on used, damaged or materially different returns. If so how? On occasions here in NZ, we get extreme heat and old cars vaporlock. If I wait a hour for the system to cool to ambient temperature then it starts easy. I'm suggesting to raise the boiling point by adding heavier or oilier substances such as kerosene. From start to finish, Holley has the parts to make your dream a reality. Today's fuel is made for high compression engines - and it has an intentionally lower vapor point, with a higher flash point and autoignition point. It will meet your needs and deliver great quality at an affordable cost. 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. Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 for Holley : Amazon.com.au: Automotive Features: Adjustable from 4.5-9 psi for precise fuel pressure adjustments Constructed of billet aluminum with a black anodized base and clear anodize top for good looks Used in systems where a return line is not needed Use with electric or mechanical pumps Holley carburetors have powered every NASCAR(R) Sprint(R) Cup team and nearly every NHRA(R) Pro-Stock champion for four decades. It works but not as well as some of the off brands like spectre. The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. The '54 Bentley already has an electric SU pump back near the tank, and it's low pressure output is just about right for the two SU H6 type carbs. One must understand the chemical reactions and interactions of blending other hydrocarbons into what we call gasoline and then still have it able to have the same properties desired of the product called gasoline. Shipping was fairly fast. 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. Could you explain a little more about how you would run the bypass? Talk to the experts. .