I have a holley low pressure reg. Privacy Policy. 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. Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. Great feedback from a knowledgeable group, guys! As you can see in the photo it's gold, (the same colour as what's in the model 12-803) I called Holley directly and customer service is acting like they're unaware of the issue, even though I've read threads online going as far back as 2018 mentioning this. The float has a needle that projects through the top of the carburettor so it is possible to see whether the float is "floating" or not. near you They use gravity feed from vacuum tank mounted under the hood and directly over the exhaust manifold. They sold more gas than coal oil. I feel I am 95% there, and a slight improvement would be all I need - for now, that is unless the ethanal mix changes (your tax dollars at work). 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 . 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. Shipping was fairly fast. Some have reported more power, easier starting and cooler running especially in very low compression cars of the twenties and early 30s. So this thread has been a great find for me particularly at this time. Learn more about our From that time on octane ratings slowly rose, helped by the addition of more and more tetraethyl lead. ;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 Please try again later. 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. I do wish there were some stamped values on the adjustment screw like other models I have seen. Gasoline at the pump is a blend of different chemicals. I cannot help you - and no one can without knowing the exact make up of the gasoline being refined where you are. Show details do you have a picture of it hooked up? Sorry, we were unable to perform your search at this time. It is not intended to be sold or used for any other purpose. 4.25 out of 5 stars. Boy am I glad to have happened on this thread. Browse In Stock and Ready to Ship Alternatives, Universal Fit, 1-4 Fuel Pressure Rating (psi), Aluminum. Sign up for a new account in our community. See Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia. Copyright 2023, Antique Automobile Club of America. Will rise to above 180 degrees on the Temperature gauge. 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 i'm trying to figure out why you are running a T when there are two outlets. Was actually disappointed with the quality of the regulator. The 12-804 is made from durable aluminum and has a satin chrome finish that is extremely resilient to corrosion and abrasive chemicals. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. I will be fitting a pressure regulator, it can only help and will have to wait for the next vapor lock to occur to see if it overcomes the flooding. . So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. . Gasoline vaporizes according to fuel system pressure. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. Purchased the regulator from Baxter, unit arrived in 4 days.. Brands like MSD, Flowmaster, Hurst, Accel and many more make up the offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and drivers. Turn the screw out to lower the pressure. Designed using state-of-the-art technology and with customers in mind. 12-804) is a Low Pressure (1-4 PSI) regulator. 9517377223. Includes initial monthly payment and selected options. The engine was running. There is no hard and fast cutoff for any of these. I have found IMCT is a happy medium that does both in the right quantities - raise boiling point and octane just enough to be a "goldie-locks" kind of additive to help prevent vapor lock. I wanted to upload the map, but at 2.73mb, it was too big. Is it a product that would be sold by a panel beater's supply shop? Overview. 10 in stock. $41.19. 0 Product very good. It's unlikely that anything's stuck. Use with standard pump only -not recommended for maximum pressure pumps. 4.9. . The BP article does not address how to re-blend your own fuel, and indeed - each batch of gasoline - and even how long it has been sitting in a tank will change it's properties as certain things evaporate out of the fuel changing it's properties if in a vented tank. In theory the vapor carburetor was the way to go in that day - with lower flash point fuels like poor grade fuels that all pretty much resembled the weight of kerosene in that early day of motor fuels. Please refresh and try again. Post in the forum instead. The ethyl acetate in the IMCT loosens hydrogen bonds on the gasoline making it easier to light to burn, but the "oil" - heavier hydro-carbon nature keeps the vapor point higher and flash point still low enough to give good performance. 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. I have heard true lead (LeadMax2000 or simillar) may do this as well? It does however produce an irritating fume that irritates the eyes and mucous membranes when burning in gasoline. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Two Port To see our price, add these items to your cart. Starting in 1970 leaded gas was taken off the market resulting in the gas we have today. The first opportunity to try it occurred recently. Holley's instructions say, ". Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising. ,