the 123\VOLVO-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 curve table for available advance curves.

Volvo-B21-B23 – 4 – R – V  = Volvo-B21-B23 stands for the 123ignition type
Volvo-B21-B23 – 4 – R – V  = 4 stands for the number of cylinders
Volvo-B21-B23 – 4 – R – V  = R stands for straight distributor cap
Volvo-B21-B23 – 4 – R – V  = V stands for vacuum advance