This is a little off topic for this group but.... I just finished building an experimental plane powered by a 347 all aluminum small block Ford. I am running a holley red pump upstream of my mechanical carter pump feeding a Holley 500 cfm two barrel. At idle my fuel pressure while using just the mech pump is just right at 5 psi, On take off with the engine at full power the pressure drops to .5 psi. When I switch on the electric pump it goes back to 5 psi. The question for you guys is.... Has anyone out there run a Holley red pump up stream of your mechanical pump and did the fuel pressure drop because the electric couldn't pass fuel when it is off????. There is a few pics of the plane and engine at CH701.com. Maybe one of you can see something that I have overlooked. Look for builders pics and then click on Ben Haas. Thanks in advance for any info on topic..
Ben Haas