[Desert1957]

Here is an interesting read from Hot Rod Magazine about fuel pressure.


Number One: Incorrect Fuel Pressure

Surprisingly, the most common problem with getting a carb working right is not having the correct fuel pressure. Quick Fuel Technology tech expert Zach Baker says: “These carbs are designed to run at 6.5 psi. You might be able to get away with 7, but we’ve had a rash of pumps that do 8 or 9 pounds, which is great from a volume standpoint of getting fuel to the front of the car, but the carburetor’s not going to be happy there so you have to run a fuel pressure regulator and a lot of people just don’t.” The head of Edelbrock’s tech department, Dave Stinson, recommends a regulated pressure of 5 to 5.5 psi on their carbs, with a max of 6.5 psi.