I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. I suspect as the article suggests even with all these steps you can still get the crap gas to boil if it is hot enough under the hood. Mr. Gasket 1561 Fuel Pressure Gauge 1.500 in. This ensures that it's set too low. I wanted to upload the map, but at 2.73mb, it was too big. Holley 12-807 Fuel Pressure Regulator Diaphragm Repair Kit made by Holley, for as low as $9.21. Fuel Pressure Regulators Instruction Sheet (42712804), Designed to be used with standard pump only, Measures 2-1/2" wide and 1-1/2" tall and deep, This low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI, It includes mounting bracket with 2 each self-tapping screws for regulator to bracket installation purposes and 3 screws for bracket to vehicle installation, 1-3/4" hole spacing to mount the regulator to the bracket. What one is after is new "liquid" fuel which vaporizes easily in open air, lights easily and has a rapid flame spread but NOT a hot explosive one, and burns easily and completely under one atmosphere of pressure - what we call 14.7 to 1 - BUT - and this is most important; does not auto-ignite at a low temperature and WAITS to be lit by the spark after being compressed in the cylinder. 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). For more information go to www.P65Warnings.ca.gov. store 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 Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. . That was in the 1990s, so you can project to more current times and suspect we have something more sophisticated now. May God's grace bless you in the Lord Jesus Christ. Adjusting Holley & Demon Mixture Screws; Holley Specs HP Series; Edelbrock Carburetor Specs; Holley Double Pumper 4150 Specs; Carter Competition Series AFB Specs; Company Info. ***The inlet pressure limitation is 7 psi. Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . loyalty program Neither the Holley instructions nor anywhere I can find says what the maximum inlet PSI should be allowed to the regulator - but I was told it was 16 psi and one other spot on the web says something similar. Copyright 2023, Antique Automobile Club of America. Going to check my VW bus fuel pump pressure. Works and does the job. 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. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports. WARNING! If so how? The reg takes 3/8" fittings and the gauge takes 1/8" fittings. TURNING THE ADJUSTMENT SCREW ALL THE WAY IN WILL RESULT IN EXCESSIVE FUEL PRESSURE . If you put in too much you can return the fuel to some "kick" without knock with a small amount of acetone. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. 4.25 out of 5 stars. Adjustable Fuel Regulation From 1 To 4 PSI.220 Inch 7/32 Inch Restriction. You could arrange them on a scale from naptha gas, gasoline, kerosene, stove oil, diesel fuel, light lubricating oil, heavy lubricating oil, grease, asphalt. This experience ties with that the owner of a very early Twin Six Packard. order Any of these heavier than gasoline petroleum distillates above will raise the vapor point of gasoline if mixed into it. 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. The two will be very close to the same just as would Water and Anti-Freeze boiled in an open pot. Shipping cost, delivery date, and order total (including tax) shown at checkout. Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. We will have the previous answer corrected. $5 Off Your $100 Mobile App Purchase . The higher the RVP, the greater the tendency to vaporize or vapor lock. NPT Inlet Attachment: ESPECIALLY a 10% ethanol blend - once generically called the gasohol summer blend in that vapor system would really be a problem. . Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. I'm still looking for the reg in this pic. GENUINE Holley 12-804 CHROME 1-4 PSI Adjustable Fuel Pressure Regulator Kit $49.99 Free shipping Holley 12-804 Carbureted Fuel Pressure Regulator $37.07 +$14.99 shipping Holley 12-804 Chrome Street Strip Fuel Pressure Regulator 1-4 PSI $54.53 Free shipping Holley Performance 12-804 Fuel Pressure Regulator $54.53 Free shipping Holley 12-804 $55.86 You'll find they both have the same initial boiling point - been there and done it. 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. Thanks to all contributors, particularly the information from Rusty, Bob and David. [endif]-->, . This diaphragm repair kit is for 12-803 and 12-804 regulators. 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 item can be returned in its original condition for a full refund or replacement within 30 days of receipt. 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. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. Holley recommends applying PTFE paste to the NPT thread of the fittings before installation on these applications. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. There is no "chemistry set" method to measure fuel vapor points. Vapor lock is caused by usually a fuel that vaporizes too easily at too low a pressure (in the line) due to under-hood heat and not enough pressure on it - which would run great if it could make it to the combustion chamber first. As you can see from what it replaces - it is "hot" solvent - but not quite as hot as acetone in its ability to dissolve other things. No mention of vapor lock issues, but engine de-carbon activities. Browse In Stock and Ready to Ship Alternatives, Universal Fit, 1-4 Fuel Pressure Rating (psi), Aluminum. i'm trying to figure out why you are running a T when there are two outlets. Pre-set at 2.8 PSI Reasonable . A larger tank might need two quarts. Holley HOL 12-804 12-804 Fuel Pressure Regulator Brand: Holley 436 ratings | 33 answered questions Amazon's Choice in Automotive Replacement Fuel Injection Pressure Regulators by Holley $4119 FREE Returns Adjustable fuel regulation from 1 to 4 psi .220" (7/32") restriction 3/8" NPT ports ( 1 in, 2 out) Mounting bracket included Pre-set at 2.8 PSI If I wait a hour for the system to cool to ambient temperature then it starts easy. Holley 12-804 Fuel Pressure Regulator Installation Instructions . Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 for Holley : Amazon.com.au: Automotive Unfortunately, these FPR are now made in Korea and they no longer include an alternate spring. [endif]--> Many thanks for taking the time to clarify this interesting subject . So with that vapor fueling system - you are stuck "downgrading it" to a lower quality fuel. Holley HOL 12-804 12-804 Fuel Pressure Regulator; ; Customer reviews . 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? The thinner, lighter products are at the light end of the scale the thicker heavier products are at heavy end. We work hard to protect your security and privacy. Please try again. [endif]--> http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf,