I am trying to tune idle on 600 cfm mechanical 4150 pumper. Can someone advise how to properly set it? Especially, what to do with the curb idle screw? This screw moves the throttle plates while throttle pedal being depressed. Should I leave the throttle plates completely closed (the screw all the way out) while tuning the idle with screws at side of the main metering body? Looked throuh tons of holley tuning tutorials including instructions on their site but cannot find straight answer to this.
