holley 12 804 adjustment

IMCT is found in the paint isle of any hardware or home improvement store usually in quart or gallon cans. . 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. Q: This will ensure that the pump will not continue to operate after the engine is . . I do wish there were some stamped values on the adjustment screw like other models I have seen. Reviewed in the United States on June 5, 2022. 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. $12.15: ac000400: Front Axle Beam Bushing Reamer For 1.34 Up To 1.50 Diameter . I prefer to keep things simple but I appreciate the more correct technical approach. What we call gasoline - as Rusty showed; is blended today - and the various chemicals blended into it for the various regions and state laws make it a special product where you BUY it. Fuel pump regulator has 3/8" NPT inlet/outlet ports. Was actually disappointed with the quality of the regulator. It's a diaphram with a spring. It is a measure, as I understand it, of how readily the fuel will evaporate in open air. Any of these heavier than gasoline petroleum distillates above will raise the vapor point of gasoline if mixed into it. 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. Note also that PURE ethylene glycol is also flammable but also miscible with water. By 1913 it was the other way around. You'll find they both have the same initial boiling point - been there and done it. #2. But the heavier elements will raise the boiling point of the mixture. I do not think we hi-jacked the thread - the article is not even available anymore online to read. This approach is not recommended for higher compression cars made from the mid fifties onwards. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. Accurate description. The regulator that was shipped to me has an internal spring from a different model of regulator, the spring should be red. 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 fuel pressure in at the top, fuel pressure out on each side. It takes a lot to hurt today's stainless steel valves, but in an older car be careful - and an exhaust gas temperature gauge is not a bad idea to invest in. We dont share your credit card details with third-party sellers, and we dont sell your information to others. Rusty, thanks so much for this information. It is not intended to be sold or used for any other purpose. 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. I got all of my supplies in the Home Depot fittings section. Why does this occur only under increased pressure? Too much anti-freeze - (typically ethylene glycol) causes the opposite effect even under pressure of the cooling system. Interesting theory. Posts: 32372. If youre looking to dial it in accurately its not going to do it. 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 The carburettor was flooding, the electric pump was still running. Gasoline vaporizes according to fuel system pressure. Holley 804 fuel pressure regulator install - YouTube 0:00 / 5:58 Holley 804 fuel pressure regulator install Schnebs Garage 2.42K subscribers Join Subscribe 72 Share Save 15K views 3 years ago. Average for the last 12 months. On occasions here in NZ, we get extreme heat and old cars vaporlock. 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 still looking for the reg in this pic. should be one inlet in two outlets out, i've seen very smart mechanically inclined people hook the carb to one outlet and the pressure in to the other, it's easy to do, not saying anything bad but could be a a possibility. Ships from and sold by Performance Guarantee. Use with standard pump only - not recommended for maximum pressure pumps. Driving on a warm day in heavy stop start traffic it started vapor locking on a climb - using 10% ethanol fuel with no additive . It needed a bit of adjusting for my purpose, but other than that, it performed perfectly. Some can be used for either - or. CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. It makes no discernible difference to power but if the conditions are sufficiently adverse it will still vapour lock and then you just have to wait until it cools. We work hard to protect your security and privacy. Remember STILL transporting fuels was a dangerous thing - and higher grade fuel could just as easily have exploded on it's way to the fueling station or in those glass top hand operated early gas pumps on a hot day. Like many others, I have been considering what to do recently. Holley 12-804 Fuel Pressure Regulator 3/8 pipe thread ports 7/32 restriction Pressure ranges from 1 to 4 PSI Includes mounting bracket Satin finish 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. 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. If so how? Lower octane will not hurt your car if the compression is low. Pre-set at 2.8 PSI So the goal is to raise the vapor point temperature without lowering the auto-ignition temperature or flash point or flame spread speed - or increasing the flame spread speed too much. Find an Automotive Service Professional Enhancements you chose aren't available for this seller. Chemistry does NOT work that way - just like adding more any one ingredient to a cake mix will make the cake better. . I would welcome your advice on this - with apologies for the length of this post. That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. 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. I've had some luck using LeadMax2000 but it's not a 100% cure. 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 . Everything does just fine, until temperatures rise above 80 degrees or so, as they are soon to do. 4.25 out of 5 stars. I cannot help you - and no one can without knowing the exact make up of the gasoline being refined where you are. [endif]--> Many thanks for taking the time to clarify this interesting subject . Spring clothes pins, aluminium foil, wet burlap, etc. NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. finish) . neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . Q: Holley Carburetor Fuel Pressure Regulator 1 To 4 Psi Bottom Inlet Sides Are Outlets from Pacific Customs Unlimited your best source for Street, Off Road, Sandrail, Dune Buggy, Manx, Rock Crawler, Volksrod, or Mud Buggy VW Parts. Join Date: Nov 2007 Posts: 22035 Share Tweet #2 I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Thinking Kerosene is probably the way I will go at this point. 12-804 : Quantity: Share : . CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. 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. 9 really is max. 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). A small amount of IMCT in gasoline - depending on whether it is the winter or summer blend - depending on what that is as a fuel where you are - raises the boiling point like kerosene or diesel - but also raises or maintains the octane level slightly as ethyl acetate tends to loosen the hydrogen bonds and lets mixture burn more completely without causing pre-ignition we call "detonation" - which is really simply a slight lowering of the "autoignition temperature". 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. May God's grace bless you in the Lord Jesus Christ. What you write in post 12 is NOT correct. 3 0 obj <>stream Most certainly also, should that be successful, I will then experiment with IMCT as well. Depending what your compression is you could add 5% kerosene up to 25% for cars from the 20s with very low compression, like 5:1 or less. We will have the previous answer corrected. 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. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Yes the light elements will still be in there. Yes, you will need to buy the type of connection you want to use such as hose barb, compre. When it does light - the flame spread is faster but not so fast as to "knock" or be a violent explosive hard burn of the fuel. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. . Conversely if you go too high and it knocks - you can bring it down with kerosene or the paint thinner family. September 21, 2010 in Technical. I wanted to upload the map, but at 2.73mb, it was too big. This product is universal and applies to all vehicles. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. 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. 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". 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 Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Quick & Hassle Free. Will rise to above 180 degrees on the Temperature gauge. I have just this Spring started taking temp. do you have a picture of it hooked up? No issues. There are two kinds and they look the same. 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. They sold more gas than coal oil. LOW PRESSURE REGULATOR 12-804 quantity. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have. "Pure" Ethyl Acetate could be called an "alcohol" as Ethyl acetate is the ester of ethanol and acetic acid; and it is manufactured on a large scale for use as a solvent. It appears this one needs 40 to 50 minimum. %PDF-1.4 A: Got a gauge on the FPR to monitor, and at first it was great. It looks like WhatsApp is not installed on your phone. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. This product is intended only for the thinning of industrial maintenance coatings. 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. In fact I can completely remove the adjusting screw and it still does not go down to 3psi. Use with standard pump only -not recommended for maximum pressure pumps. At first it seemed fine, set it to 1.5 PSI and away we go. Lots of Chinese Holley 12-803, 804 etc knock-offs are available. Shop Fuel Pressure Regulators at Summit Racing. Recommended Parts. Can you adjust the fuel pressure? Now my equipment sits idle while I wait for a response from the vendor. Sorry, we were unable to perform your search at this time. Octane is an actual chemical which would be at the light end of the scale for gas, kerosene would be at the heavy end. Amazon has encountered an error. ", So . All petroleum distillates have different chemical properties which change depending on what you mix them with. Please try again. Chrome Finish. order I can only say acetone will lower flash point (light easier) but also lower auto-ignition temperature and thus create knock into too much of a quantity - while a very little bit will raise octane but not lower auto-ignition - so if you go TOO low with kerosene or diesel you can bring back some kick to the fuel with SMALL amounts of acetone. Purchased the regulator from Baxter, unit arrived in 4 days.. Google ethyl acetate and pay attention to it's "pure" boiling point, and remember IMCT is a blend of a white gas family of a petroleum distillate and ethyl acetate. 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. 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. Log In / Register Order Status. Too much fuel pressure for a given needle and seat . Tags: None TheSilverBuick ALMOST Spidey ! the installation of a Holley 12-810 oil pressure safety switch is recommended for installation into the wiring circuit. Then, we got what was loosely described as winter gas, all year round, with RFG. . Rusty said any heavier hydrocarbon WILL raise the boiling point - and I said Rusty is correct and OD is wrong. So with that vapor fueling system - you are stuck "downgrading it" to a lower quality fuel. Post in the forum instead. on this design the adjusting screw all the way out should decrease the pressure the most - IF the ball valve will seat TIGHT, When I adjusted pressure below 30 - it would not seat any longer even with the adjustment screw all the way out. . THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING THE . 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. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. To add the following enhancements to your purchase, choose a different seller. holley blue fuelpump pressure erratic. Copyright 2023, Antique Automobile Club of America. There was a problem completing your request. bowls after each run, just to see exactly at what temperature the problems become apparent. In some areas, according to the map, RVP can vary from about 7.0 to 9.0 in some of the fuels. 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? loyalty program 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. Once the fuel fills up the float bowls in the carburetor and the needles and seats shut, it starts to build pressure, pushing the diaphragm against the adjustment spring under the adjustment screw and allowing the ball to go "up" against the seat, effectively shutting off fuel flow to the carb. Reviewed in the United States on September 4, 2017. 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. Sorry, you're using a web browser that is no longer supported. Gauge looks small..it is not. Easy to read. Try it, I think you will find it works. It will meet your needs and deliver great quality at an affordable cost. The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. I recently fitted an electric fuel pump to one of the cars. I tried to bring the 0-140 pressure feed regulator down to 30 by adjusting the two - to up the return flow and lower the feed pressure - but the 15 psi reg I had just worked on started to climb past 9. 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. 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. In refining crude oil they distill it to separate out the different products. Does it come with the hose fittings or to be bought separately? I still think they sent you the high pressure one. Purchased the regulator from Baxter, unit arrived in 4 days.. Yes. Please try again later. Our payment security system encrypts your information during transmission. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. I have heard true lead (LeadMax2000 or simillar) may do this as well? Talk to the experts. and a rotary click style one here on the shelf pete, you are welcome to borrow them to troubleshoot your problem.. let me Know. What Rusty writes IS correct. Holley HOL 12-804 12-804 Fuel Pressure Regulator. Much of the excess engine heat will end up soaking the fuel system under the hood. [endif]-->,