Might have been along the same lines as adding a quart of atf to the engine oil to help quiet noisy hydraulic valve lifters, or for "sludge clean-up" activities? The pressure regulator works fine when mounted flat, but should work ok when mounted on it. I still think they sent you the high pressure one. Gasoline vaporizes according to fuel system pressure. Great feedback from a knowledgeable group, guys! 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. This item: Holley HOL 12-886 Regulator $13129 MEASUREMAN 1-1/2" Dial Size, 304 Stainless Steel case, Liquid Filled Fuel Pressure Gauge, 0-100Psi, 3-2-3%, 1/8"NPT Center Back Mount $2597 Moroso 65380 Fuel Line Fitting $1701 Total price: $174.27 Add all three to Cart Some of these items ship sooner than the others. Too much fuel pressure for a given needle and seat . The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. Discussion in 'The Hokey Ass Message Board' started by oldrelics, Oct 12, 2010. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability, Holley HOL 12-804 12-804 Fuel Pressure Regulator. Mr. Gasket 1561 Fuel Pressure Gauge 1.500 in. If this is true, how come adding antifreeze to water raises the boiling point? 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? near you Conversely if you go too high and it knocks - you can bring it down with kerosene or the paint thinner family. Features: Adjustable fuel regulation from 1 to 4 psi .220" (7/32") restriction 3/8" NPT ports ( 1 in, 2 out) Chrome finish Mounting bracket included Pre-set at 2.8 PSI About Holley Typically there are "winter" and "summer" blends with different vapor pressures to promote atomization at cold temps and to discourage vapor lock at hot temps. 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. Boy am I glad to have happened on this thread. We currently do not have an estimate when this item will ship. It is not intended to be sold or used for any other purpose. Walk back over and looked again, 9lbs. Reviewed in the United States on June 5, 2022. Works and does the job. #2. Please try again later. 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. THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING THE . The higher the RVP, the greater the tendency to vaporize or vapor lock. Bobburns thank you for the confirmation and technical explanation. We will have the previous answer corrected. 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. My car runs and idles fine with no flooding when running with the electric pump, the flooding only occurred once when it vapor locked. 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. Then I got this good one, to try to get 1.5 PSI to the Kadrons. I have a holley low pressure reg. 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. . $59.69 . Everything does just fine, until temperatures rise above 80 degrees or so, as they are soon to do. I do wish there were some stamped values on the adjustment screw like other models I have seen. They put everything they could into the coal oil including what we would consider low grade gasoline. I remember when I was a teen in the 50's and everyone had a flathead Ford V8 or a Chevy stovebolt 6. Note also that PURE ethylene glycol is also flammable but also miscible with water. By I look upon that effort with a heavy heart though, for I have been religious about keeping the old car original as possible. One needs to have studied Chemistry as I have to actually know how this works. 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. Steve_Mack_CT Reid Vapor Pressure (RVP) is a commonly used indicator of gasoline volatility. A: There was a problem adding this item to Cart. . Changing the vapor pressure (and thus the boiling point) of gasoline is not new. 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. You can do a Google search for it, though. I prefer to keep things simple but I appreciate the more correct technical approach. It was not. Once these chemicals are blended - the over-all resulting chemical properties - especially boiling point under pressure is changed - they are NO LONGER SEPARATE boiling points in play. So in an open cup the boiling points would also appear the same as water but under pressure the boiling point is different. fuel pressure in at the top, fuel pressure out on each side. Reviewed in the United States on September 4, 2017. Auto Parts v 6c02f45cd (2fvgn) cv1440. 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". So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. Reasonable . I have heard true lead (LeadMax2000 or simillar) may do this as well? Please try again. A vapor lock condition would be caused. 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. 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. 3 0 obj <>stream It is a measure, as I understand it, of how readily the fuel will evaporate in open air. CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. IMCT is found in the paint isle of any hardware or home improvement store usually in quart or gallon cans. Kerosene diesel fuel or stove oil will work. 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. In the early days of the oil business the demand was for kerosene or coal oil. Discussion in 'The Hokey Ass Message Board' started by striper, Aug 12, 2009. [endif]-->,