Mechanical control

Very trifle factors affect on the performance of the automobile motor, point gap, ignition timing and Air/Fuel mixture while idling.
Recent computerized car are all free from cares on them because of preset controls.

Even on the stage of Legal Inspection comes round every 2 years for a privately owned automobile, I've never realized the upper requirement as some urgent and important issues.
ECU in the modern automobiles controls so perfectly as to be completely forgotten checking items.

After establishing upper adjusting procedures in tough mechanically, I wonder how much tasks have been performed by the computerized electric components with perfect skill automatically?

On the other hand I feel some satisfaction after adjusting on fully mechanically controlled old automobile like VW 1302 Super Beetle.
In another words, adjusting the controls as I like in my own taste is the privilege for fully mechanically controlled old ones.

As for exhaust gas legal checking for emission control, 4,5% CO and 1200ppm HC are cleared if the idle mixture is well adjusted.
Solex 34PICT3 carburetor in VW 1302 Super Beetle has enough capability and good performance.