. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. I can start my car instantly after sitting in a cool garage at about 75 deg F. Drive 30 miles and then park for 20 minutes. They use gravity feed from vacuum tank mounted under the hood and directly over the exhaust manifold. That's not to say that adding something like kersene won't help, but it can't eliminate the volatile components. Eligible for Return, Refund or Replacement within 30 days of receipt. I have largely eliminated this problem with all fuel system components rebuilt, and an electric fuel pump but will get occasional stumble with a hot (after say, an hour run) engine idling or in traffic if it is say, 80 or hotter out. Posts: 32372. The issue is simple that one is seeking to "re-blend" their own gasoline from one already sold. I think we have hijacked Steve's thread where he asked the question about raising the boiling point of gas which hopefully has been fully answered by these side issues. 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. From start to finish, Holley has the parts to make your dream a reality. It feeds fuel directly from the tank to the carburettor. Why does this occur only under increased pressure? If your having pressure controll issues with the Holley regulators you can eliminate most problems with stability by installing a by pass line back to the tank and usualy a street car can use 1/8 copper. #1 Holley 12-803 Fuel Pressure Regulator January 16, 2011, 11:41 AM Can it be mounted upside down (adjustment screw pointing down) and still work properly? Add some heavy ends. The intent being to get "cool" fuel to the carburettor bypassing the areas where the system heats the fuel. Wont be good for a finicky carb. None of them worked. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. So they started putting more of the low grade gas, or high grade kerosene into the gas. Stay up to date with the latest releases, events, promotions and more. September 21, 2010 in Technical. WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. If you have it plumbed up "dead headed", lowering the pressure might not react very quickly. You can wire a by-pass switch for priming if it is really required. If yes what size should I, A: Gasoline at the pump is a blend of different chemicals. I do not think we hi-jacked the thread - the article is not even available anymore online to read. 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 . CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. . 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". Thanks again fellows, for such informative posts. 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. It will meet your needs and deliver great quality at an affordable cost. This approach is not recommended for higher compression cars made from the mid fifties onwards. Holley part number for the kit is 12-807; Summit sells it for about $6. 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. This product is made of high-quality materials to serve you for years to come. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. couple more questions, Rusty, what exactly are "heavy ends"? I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Mounting Bracket Included. One common problem is when you have an abnormally warm day in the winter, and the low vapor pressure gasoline in the car will vapor lock on that hot day. 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. here's one installed,same holley low pressure regulator, line pressure in the top, one side is hooked to the fuel pressure sender, other to the line going to the fuel block. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. Some can be used for either - or. See also Tom Ogle's "modern" vapor fueling system - google it. It needed a bit of adjusting for my purpose, but other than that, it performed perfectly. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. Sign up for a new account in our community. If I wait a hour for the system to cool to ambient temperature then it starts easy. 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. loyalty program Easier said than done - especially without a "chemistry set", OD says a simple high school chemistry experiment will show this - BUT I said the boiling points will appear the same under STP (Standard Temperature and Pressure - which is one atmosphere of pressure at 77 degrees F - commonly room temperature ) - BUT under pressure in a fuel line the boiling point (vapor point) will be raised enough to prevent vapor lock at higher temperatures. As a single solution, or partnered with products from other Holley companies - Hooker Headers(R), Flowtech(R) Exhaust, NOS(R) Nitrous, Weiand(R), Earl's Performance Plumbing(R), or Diablosport(R)- Holley products can give you the edge you need over the competition. 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. It IS variable and a result of the various fuel blend components. Please try again later. My bypass line has a shut-off valve that I can use to manually adjust the pressure, but when air bubbles develop within the input fuel line, this valve requires adjustment to maintain the fuel pressure. Usually, just runs really lean for a couple of minutes, and will not go above idle until fresh fuel finally clears through. Ships from and sold by Performance Guarantee. The fuel pressure is at 1 - 3 psig since the pump is not running. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Purchased the regulator from Baxter, unit arrived in 4 days.. f9vxY"IpBQ? 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I've had some luck using LeadMax2000 but it's not a 100% cure. 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 inlet pressure limitation is 7 psi. Sorry, you're using a web browser that is no longer supported. All kinds of remedies were tried. do you have a picture of it hooked up? 03-28-2012, 03:04 AM. Now my equipment sits idle while I wait for a response from the vendor. 1 oz per gallon - not more than 2 is usually in the right "goldie-locks" range. The project involved installing a 250LPH electric fuel pump on a relay system and then T off to a bypass line and a fuel pressure regulator on the fuel line going to the generator. Browse In Stock and Ready to Ship Alternatives, Universal Fit, 1-4 Fuel Pressure Rating (psi), Aluminum. 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. Post in the forum instead. It was about this time that car makers lowered the compression ratios, went to long stroke motors, and developed hot spots and vaporizers on their intakes to burn the new low grade or low octane gas. What I would do, is with the car off, (or electric pump off), turn the screw a good ways out. Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising. So, I take the reg apart to see if it is all clean and looks good. Please choose a different delivery location. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. 10 in stock. 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. [endif]-->
