Awfully good performance!

Only 1/16 of closing angular rotation of air volume control screw on Solex 34PICT3 carburetor equipped in VW 1302 Super Beetle has brought a remarkable improvement on combustion of AD 1600cc motor that had been used 40,000km distance for these 40 years in best conditioned machinery.

Ultimately comfortable combustibility has obtained at 10 degree BTDC with both centrifugal and vacuum ignition timing advancing system at idle speed and 30 degree at 3,000rpm.

Leaner mixture and less ignition timing advancing cause motor jerky feeling.
Good balanced A/F mixture, under the condition of high enough compressive pressure, with strong and even sparks, at good timing are the requirements for good combustion.

To know how, to feel good, to adjust at best condition and to establish all the procedure that's necessary are the great fun for me, this kind of hobby has been supporting myself internally since my childhood.

Recent computer controlled automobiles give us a little pleasure, because the motor condition is fully controlled by factory preset soft wear precisely, no way to interrupt in the way, every user is a complete outsider in controlling the motor conditions.

Though the motor is keeping it's vest condition all the time, some loneliness must be felt by a specific user who wants to enjoy making conversation with the internal combustion engine and to adjust some balance for it's utmost performance.