Holley's recommendation on fuel pressure is a little bit ridiculous. Remember, they're building hotrod carbs intended to be run at or near full throttle all the time. I think their suggestions are outrageous and should probably be ignored, especially since they also sell electric fuel pumps. Anybody who promises to solve all my problems by selling me something? No thanks- - - -I don't need any ocean front property in Arkansas, either. I've run bunches of Holley carbs in all sorts of applications including round track racing and I've never run that much fuel pressure. The NASCAR affiliated 5/8 mile track at Nashville specifically prohibited electric fuel pumps, and we ran those small block V8's from 3K RPM to 6K or so twice a lap with regular mechanical pumps. Street-driven engines will seldom, if ever need that much fuel. This isn't some pipe dream from reading an internet blog like a lot of the "experts" here will quote- - - - -I'm speaking from real world experience. Get the mixture right through the entire operating range of the engine, and ignore the fuel pressure.
Jerry
