the 123VOLVO-B21-B23-4-R-V is designed for the Volvo B17, B19, B21, B23 and B230 engines, not only for classic cars like the Volvo 242, 244, 245 etc but also for the trucks and boats ( Volvo Penta ) .
the 123 offers advance-curves for B17 – B25 Volvo & Volvo Penta engines including turbo engines. This is the result of thorough research in the original Volvo-workshopmanuals. (even a couple of optimised LPG/Ethanol curves are available )
The unit offers a maximum total of 16 advance-curves to be selected by the end-user.
Please take a look in the table below for available advance curves.
| Specifications | |
| Cylinders: | 4 |
| Directions: | CW/CCW |
| Voltage: | 4,0 – 15,0 volt |
| Range: | 500 – 8000 rpm |
| Temperature: | -30 to 100 Celsius |
| Coil: | stock or High Energy coil, primary coil NOT below 1,0 ohm |
| Dwell: | constant current, fully autom. |
| Time-out: | after 1 second current is switched off |
| Spark-bal: | <0,5 degr. crankshaft |
| Vacuum: | Starts at 100 mmHg, ends at 10 degr. @ 300 mmHg |
| Max. Advance: | 45 degr. crankshaft |
| Wiring: | red = +6V or +12V, black = ‘-‘ coil |








