Ignition Timing

Idle speed approx. 500 rpm with shift lever in "P" or "N" and all accessories turned off. The idle On-Off ratio should be 30 - 70 %.

Ignition Distributor Bosch Designation	0 237 401 012
Adjusting Value with Vacuum	5 at idle Degrees Before Top Dead Center At RPM (deg BTDC @ rpm)
Centrifugal Advance without Vacuum	10 - 14 at 1500 Degrees Before Top Dead Center At RPM (deg BTDC @ rpm)
	22 - 26 at 3500 Degrees Before Top Dead Center At RPM (deg BTDC @ rpm)
Vacuum Adjustment Towards Retard at idle speed	N/A
Vacuum Adjustment Towards Advance at 3000 rpm	18 - 22 at 3000 Degrees Before Top Dead Center At RPM (deg BTDC @ rpm)
Distributor Installation Value at Cranking Speed Without Vacuum	5 Degrees Before Top Dead Center (deg BTDC)