Sorry, you're using a web browser that is no longer supported. I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. 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). This part is Backordered. See also Tom Ogle's "modern" vapor fueling system - google it. I am intrigued by you statement, "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.". The summer gasoline vaporizes in the line and the heat soak is quicker and longer on hot day's. Holley recommends applying PTFE paste to the NPT thread of the fittings before installation on these applications. This product is intended only for the thinning of industrial maintenance coatings. te4cmCbGnt]&~`N@RPyBTa$=~fo:/T 92YE)3Uofo4Ou].-zowDt*ae^qf9z/?. Interesting theory. Fuel Pressure Regulator; Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. For the best experience please upgrade or visit the site on another browser. The reg takes 3/8" fittings and the gauge takes 1/8" fittings. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Rusty, if you can find a cooperative local high school chemistry class, take a small amount of gasoline, split it into 2 portions, add 5% or so kerosene to one half, and have them do a fractional distillation on both. To see our price, add these items to your cart. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. 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. Changing the vapor pressure (and thus the boiling point) of gasoline is not new. He finally achieved significant improvement by fitting a vent to the carburettor top (which is routed away and under the car for safety). There is a light spring that helps push the ball against the the seat in the direction of the fuel flow. Holley 12-804 Fuel Pressure Regulator Installation Instructions . 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. Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. A: The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. 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. [endif]-->