Trying to learn about carbs so bought an vacuum gauge to adjust the idle mixture ratio. Here is what I am getting at idle. Any ideas or is this reading ok? Gauge is from Harbor Freight so maybe it is bad?
Engine fully warm, idle set to 800-850 rpm. Gauge hooked to small port underneath in front of carb. Engine (from what I am told) is a ZZ4 shortblock with Edelbrock RPM heads, intake, and assume the matching cam. Carb is Holley Street Avenger 670. Mixture screws are 1 full turn out.
Engine runs good and doesn't seem like there are any issues. Just checking things out, learning, and tinkering with it.