Is it a product that would be sold by a panel beater's supply shop? I realize this is an old post - but when people write things that are WRONG - it leaves the next Joe who comes along thinking that is the correct answer when especially in this case - it is NOT. The two will be very close to the same just as would Water and Anti-Freeze boiled in an open pot. #1 Holley 12-803 Fuel Pressure Regulator January 16, 2011, 11:41 AM Can it be mounted upside down (adjustment screw pointing down) and still work properly? Octane is an actual chemical which would be at the light end of the scale for gas, kerosene would be at the heavy end. 3 0 obj <>stream However I would welcome you advice on the following. CBPN804A Swinging Drawbar Pin Kit Ford NAA 501 600 700 800 900 2000 3000 4000. 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. Tags: None TheSilverBuick ALMOST Spidey ! . From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holleys commitment to its customers and their cars is at the core of everything we do. I have a holley low pressure reg. This part is Backordered. do you have a picture of it hooked up? You'll find they both have the same initial boiling point - been there and done it. Gasoline was so light if you left the cap off a gallon can it would all evaporate in a few days. NOTE: P/Ns 12-841, 12-842, & 12-879 utilize 3/8" NPT inlets and outlets. 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. Try it, I think you will find it works. The Holley 12-804 is one of the most popular low fuel pressure regulators that works perfectly for setups that require 1 to 4 PSI. It's unlikely that anything's stuck. 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. Will buy again if I need another one for a different project. Generally speaking if your car was made before 1953 it has low compression. , .