Running Rich-72 SU Carbs

[z3beemer]

Been searching the forum for ideas on my current problem.  Final stages of complete restorations of my 73 Z.  My latest issue is it running rich.  I have replaced the 73 carbs with 72 round tops that I completely rebuilt.  The car runs fines at all rpms and speeds (actual driving it).  It smells rich and does some popping thru the exhaust. I should also mention I have headers on the car.  The carbs have new .100 nozzles from z therapy and N54 needles.  In an attempt to lean it out I've tried incrementally adjusting the Idle nuts 1/2 turn clockwise (did it 2 times 1/4 turn at a time).  According to the 72 FSM says turning the idle adjustment nut clockwise reduces fuel and turning it counterclockwise increases fuel delivery.  I assume if I'm reducing fuel, I'm leaning it out. However, when I went for 1/4 turn cw to 1/2 turn, it seemed to get richer.  Is the FSM correct?  I know I've found other errors in the FSM before. When I originally rebuilt the carbs I set the nozzle depth at 2.2mm as recommended by the FSM. How else can I lean it out?  Am I on the right track?  Like I said it's running well except for the rich smell and popping thru the exhaust.

[Mark Maras]

Clockwise and counterclockwise adjustments are made imagining you're viewing the bottom of the carb. Try reversing the adjustment directions.

[Patcon]

Yes, the threading is standard righty tighty but looking from the bottom. So from above, everything is backards.

If you can't adjust it out with the mixture nuts then it's a float level issue