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. Please use a different way to share. No issues. Gasoline vaporizes according to fuel system pressure. To ensure this condition, the installation of a Holley 12-810 oil pressure safety switch is recommended In those days before 1905 kerosene had a strong piercing odor and coal oil lamps sometimes exploded. I have already been thinking about switching over to a modern fuel pump, say the Mallory 110, plumbing in a regulator just downstream of the carbs, and taking the bypass fuel back to the fuel tank. holley blue fuelpump pressure erratic. In answer to Rusty's comment about adding anti freeze to water, the difference is that water is only one material, H2O, with a single boiling point (varied only by pressure). So in an open cup the boiling points would also appear the same as water but under pressure the boiling point is different. Fuel pump regulator has 3/8" NPT inlet/outlet ports. Too much anti-freeze - (typically ethylene glycol) causes the opposite effect even under pressure of the cooling system. Holley HOL 12-804 12-804 Fuel Pressure Regulator. . I would like to try IMCT, how is it sold? I did, works great & looks beautiful. The summer gasoline vaporizes in the line and the heat soak is quicker and longer on hot day's. 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. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. Second, you adjust this regulator by turning the hex screw on top - does anyone happen to know how many pounds one or more full turns would produce etc? Stay up to date with the latest releases, events, promotions and more. Then I got this good one, to try to get 1.5 PSI to the Kadrons. Take a look at the article below. Includes initial monthly payment and selected options. Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. 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. Rusty, thanks so much for this information. I still think they sent you the high pressure one. Depending on what kind of electric fuel pump you used you will need a regulator - or series of regulators to step down the pressure getting to the carburetor like a Holley 12-803 type at the very least. if you were packing them in boxes they would look identical. Does this mean that we are back to the situation described by OD where the lower boiling point additive reduces only the average boiling point? There was a problem completing your request. $41.19. Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO". The vapor lock issues that I have are with 1920's Packards where the fuel system is essentially at atmospheric pressure throughout. It is not intended to be sold or used for any other purpose. Regards, Mike. 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. Putting kerosene into gasoline - while both are hydrocarbons - and they will blend - the lighter oil nature of the kerosene to the solvent of gasoline; in an amount of 5% is not enough to change the STP vapor point of the gasoline, but it will weaken the octane rating of the gasoline enough to feel it under acceleration AND under pressure will raise the vapor point enough to perhaps prevent vapor lock depending on the ambient and under hood temperatures of where one is located. At first it seemed fine, set it to 1.5 PSI and away we go. It's a diaphram with a spring. Refineries have been doing this for decades. 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. Holley 12-804 Fuel Pressure Regulator Installation Instructions . I adjust it up to 2.5 pounds and clean my hands. http://www.jalopyjournal.com/forum/showthread.php?t=386155, Kingman, Arizona - The place on the way to other p, http://www.holley.com/types/Fuel%20Pressure%20Regulators%20-%20Carbureted.asp, (You must log in or sign up to reply here. 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. 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. Conversely if you go too high and it knocks - you can bring it down with kerosene or the paint thinner family. Can you adjust the fuel pressure? Our payment security system encrypts your information during transmission. 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. Privacy Policy. Brief content visible, double tap to read full content. Keep in mind that when there is pressure in the line, backing off on the adjustment isn't going to make the pressure go down. By 1913 it was the other way around. Contact Us - DO NOT EMAIL CAR QUESTIONS. ***The inlet pressure limitation is 7 psi. Sorry, we were unable to perform your search at this time. Add some heavy ends. We work hard to protect your security and privacy. Works, don't use a liquid filled gauge in an engine compartment! 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 . I Have problems with the fuel temp in my 1937 Buick. All kinds of remedies were tried. A: By Please try again. ${cardName} not available for the seller you chose. 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. Some of these items ship sooner than the others. Usually, just runs really lean for a couple of minutes, and will not go above idle until fresh fuel finally clears through. (see reg-setp.pdf), This is the same design as a Holley 12-803 or 804 knock off, so I looked up Holley's instructions. Of course you may already have this setup - that is the first issue. A: The higher the RVP, the greater the tendency to vaporize or vapor lock. Rich boys replaced their 216 stovebolt 6's with GMC 270 or 302 sixes with a performance "full race" cam. I commented that it was already vented by the clearance around where the float needle projects through the top but he advised that this was not enough and the vent needed to be at least a 1/4" tube and that he could see it venting vapor. 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. Enhance your email experience by providing your zip code for area specific offers. A quart of diesel added to the gas tank solves the problem without any more in side effects than a slight smell from the exhaust. I had hoped that the cooler fuel from the electric pump would solve the problem but it did not. Was actually disappointed with the quality of the regulator. Will buy again if I need another one for a different project. Join Date: Nov 2007 Posts: 22035 Share Tweet #2 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. 0 The point is the 0-140 regulators (they are all coming out of China now-a-days) will not regulate lower than about 20 reliably so you need a staged system - and even Holley says so on the 803BP design set up. 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. Post in the forum instead. Please make sure that you are posting in the form of a question. To add the following enhancements to your purchase, choose a different seller. I have the one I have set up in a deadhead setup. 10 in stock. 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. For more information go to www.P65Warnings.ca.gov. Troubleshooting Carburetor Problems and Vaporlock Blues Revisited - Hagerty Lifestyle. Holley 12-804 Holley Fuel Pressure Regulators JEGS 41040 JEGS Fuel Pressure Gauges Now you need fittings. CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. The peak was reached in the sixties when heavily leaded gas of over 100 octane was available. [endif]-->