Ok, here’s what I have. An old SX fuel systems 160 pump. I believe they were bought out by Edelbrock because their billet pumps look identical. I tested this pumps free flow at 2 gallon per minute. The pump out of the box was 12psi, but I turned it down years ago and now I read 6psi. While testing my combo on the freeway flat footing it for about 5 seconds in high gear I see it drops about 1.5 to 2 psi. Just thought I would bump it up a bit.
Test free flow with an orifice that matches the area of your needle and seat. That will give you a better idea of how much flow it can actually produce at WOT. 2gph is enough fuel for over 1000 hp but if it drops to 1 gph when using a restriction you'll be in trouble. I agree, 12 psi seems low for line pressure. That doesn't seem like it provides much margin for error.
