Solex 34 PICT 3 carburetor in VW 1302 Super Beetle was re-adjusted the other day, precise positioning of throttle most closed point, fundamental mixture control, Auto-choke module positioning and idle condition in combination with the ignition timing BTDC 7.5 degree conditioning with vacuum advancer activation. Change of fuel octane from premium to regular gasoline required complete change of carburetor and distributor setting from the beginning. Smooth and powerful acceleration could be obtained after the work. Fuel mixture control with smaller screw positioning is the key to establish the work especially to know the highest rotational point and to do 30 RPM downing angular position.
All the inconvenience in the phase of acceleration from low to middle rotation was wiped out with so smooth transient property. To know, feel and discern the motor combustion condition, "Fuel is rich or lean now" is some vital point at all.
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